./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe001_rmo.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/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_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe001_rmo.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/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_0f28327b-c5bf-485a-bf07-1030bc496e6a/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 0d3dfcdcbd1ef266a13f83c8ffcd1431cdbd44aa9b3fb0ca280daf8703879343 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:22:51,213 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:22:51,288 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:22:51,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:22:51,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:22:51,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:22:51,323 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:22:51,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:22:51,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:22:51,325 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:22:51,326 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:22:51,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:22:51,327 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:22:51,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:22:51,329 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:22:51,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:22:51,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:22:51,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:22:51,331 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:22:51,332 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:22:51,332 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:22:51,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:22:51,334 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:22:51,334 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:22:51,335 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:22:51,335 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:22:51,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:22:51,336 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:22:51,337 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:22:51,337 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:22:51,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:51,338 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:22:51,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:22:51,339 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:22:51,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:22:51,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:22:51,340 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:22:51,340 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:22:51,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:22:51,341 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_0f28327b-c5bf-485a-bf07-1030bc496e6a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3dfcdcbd1ef266a13f83c8ffcd1431cdbd44aa9b3fb0ca280daf8703879343 [2023-11-21 22:22:51,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:22:51,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:22:51,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:22:51,701 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:22:51,702 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:22:51,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-wmm/safe001_rmo.oepc.i [2023-11-21 22:22:55,209 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:22:55,596 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:22:55,597 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/sv-benchmarks/c/pthread-wmm/safe001_rmo.oepc.i [2023-11-21 22:22:55,620 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/data/e69432dee/35ff35b276ef448ea0cdec97e06a3c4d/FLAG4cd41b359 [2023-11-21 22:22:55,642 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/data/e69432dee/35ff35b276ef448ea0cdec97e06a3c4d [2023-11-21 22:22:55,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:22:55,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:22:55,652 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:55,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:22:55,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:22:55,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:55" (1/1) ... [2023-11-21 22:22:55,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d582d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:55, skipping insertion in model container [2023-11-21 22:22:55,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:55" (1/1) ... [2023-11-21 22:22:55,732 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:22:56,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:56,384 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:22:56,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:56,541 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:22:56,542 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:22:56,552 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:22:56,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56 WrapperNode [2023-11-21 22:22:56,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:56,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:22:56,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:22:56,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:22:56,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,687 INFO L138 Inliner]: procedures = 176, calls = 83, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2023-11-21 22:22:56,688 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:22:56,689 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:22:56,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:22:56,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:22:56,702 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,725 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,791 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:22:56,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:22:56,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:22:56,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:22:56,794 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (1/1) ... [2023-11-21 22:22:56,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:56,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:56,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:22:56,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f28327b-c5bf-485a-bf07-1030bc496e6a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:22:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:22:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:22:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 22:22:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:22:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:22:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:22:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-21 22:22:56,905 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-21 22:22:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-21 22:22:56,905 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-21 22:22:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-21 22:22:56,906 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-21 22:22:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:22:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 22:22:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:22:56,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:22:56,909 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 22:22:57,161 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:22:57,164 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:22:58,050 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:22:59,320 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:22:59,320 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 22:22:59,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:22:59 BoogieIcfgContainer [2023-11-21 22:22:59,323 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:22:59,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:22:59,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:22:59,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:22:59,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:22:55" (1/3) ... [2023-11-21 22:22:59,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78310de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:22:59, skipping insertion in model container [2023-11-21 22:22:59,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:56" (2/3) ... [2023-11-21 22:22:59,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78310de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:22:59, skipping insertion in model container [2023-11-21 22:22:59,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:22:59" (3/3) ... [2023-11-21 22:22:59,343 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_rmo.oepc.i [2023-11-21 22:22:59,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:22:59,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-11-21 22:22:59,372 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:22:59,590 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:22:59,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 106 transitions, 224 flow [2023-11-21 22:22:59,764 INFO L124 PetriNetUnfolderBase]: 2/103 cut-off events. [2023-11-21 22:22:59,764 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:22:59,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 103 events. 2/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 409 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-11-21 22:22:59,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 106 transitions, 224 flow [2023-11-21 22:22:59,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 103 transitions, 215 flow [2023-11-21 22:22:59,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:22:59,815 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;@68aeb469, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:22:59,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-11-21 22:22:59,821 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:22:59,821 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-21 22:22:59,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:22:59,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:22:59,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:22:59,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:22:59,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash 30666, now seen corresponding path program 1 times [2023-11-21 22:22:59,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:59,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26934881] [2023-11-21 22:22:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:59,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:00,186 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 22:23:00,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:00,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26934881] [2023-11-21 22:23:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26934881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:00,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:00,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:23:00,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925821965] [2023-11-21 22:23:00,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:00,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:00,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:00,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:00,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 106 [2023-11-21 22:23:00,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 103 transitions, 215 flow. Second operand has 3 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 22:23:00,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:00,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 106 [2023-11-21 22:23:00,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:12,397 INFO L124 PetriNetUnfolderBase]: 28514/43016 cut-off events. [2023-11-21 22:23:12,398 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-21 22:23:12,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82809 conditions, 43016 events. 28514/43016 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 3457. Compared 365750 event pairs, 25104 based on Foata normal form. 1300/20789 useless extension candidates. Maximal degree in co-relation 82795. Up to 34966 conditions per place. [2023-11-21 22:23:12,834 INFO L140 encePairwiseOnDemand]: 71/106 looper letters, 71 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-21 22:23:12,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 94 transitions, 343 flow [2023-11-21 22:23:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:23:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-11-21 22:23:12,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2023-11-21 22:23:12,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-11-21 22:23:12,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-11-21 22:23:12,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:12,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-11-21 22:23:12,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 22:23:12,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:12,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:12,889 INFO L175 Difference]: Start difference. First operand has 111 places, 103 transitions, 215 flow. Second operand 3 states and 198 transitions. [2023-11-21 22:23:12,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 94 transitions, 343 flow [2023-11-21 22:23:12,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 340 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:23:12,904 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 148 flow [2023-11-21 22:23:12,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-11-21 22:23:12,911 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -33 predicate places. [2023-11-21 22:23:12,911 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 148 flow [2023-11-21 22:23:12,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 22:23:12,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:12,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:23:12,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:23:12,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:12,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 30667, now seen corresponding path program 1 times [2023-11-21 22:23:12,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:12,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806403236] [2023-11-21 22:23:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:12,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,187 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 22:23:13,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:13,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806403236] [2023-11-21 22:23:13,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806403236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:13,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:13,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:23:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87040493] [2023-11-21 22:23:13,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:13,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:13,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:13,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:13,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 106 [2023-11-21 22:23:13,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 148 flow. Second operand has 3 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 22:23:13,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:13,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 106 [2023-11-21 22:23:13,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:21,198 INFO L124 PetriNetUnfolderBase]: 28514/43015 cut-off events. [2023-11-21 22:23:21,199 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-21 22:23:21,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83456 conditions, 43015 events. 28514/43015 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 3457. Compared 365980 event pairs, 25104 based on Foata normal form. 1/19489 useless extension candidates. Maximal degree in co-relation 83445. Up to 34965 conditions per place. [2023-11-21 22:23:21,510 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 70 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-21 22:23:21,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 340 flow [2023-11-21 22:23:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:23:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-21 22:23:21,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-11-21 22:23:21,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-21 22:23:21,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-21 22:23:21,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:21,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-21 22:23:21,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 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 22:23:21,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:21,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:21,526 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 148 flow. Second operand 3 states and 148 transitions. [2023-11-21 22:23:21,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 340 flow [2023-11-21 22:23:21,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:23:21,766 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 146 flow [2023-11-21 22:23:21,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-21 22:23:21,767 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -34 predicate places. [2023-11-21 22:23:21,768 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 146 flow [2023-11-21 22:23:21,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 22:23:21,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:21,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:23:21,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:23:21,770 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:21,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash 914573744, now seen corresponding path program 1 times [2023-11-21 22:23:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:21,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868675786] [2023-11-21 22:23:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:21,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:21,864 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 22:23:21,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:21,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868675786] [2023-11-21 22:23:21,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868675786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:21,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:21,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:23:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018049613] [2023-11-21 22:23:21,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:21,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:21,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:21,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 106 [2023-11-21 22:23:21,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 146 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 22:23:21,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:21,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 106 [2023-11-21 22:23:21,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:28,039 INFO L124 PetriNetUnfolderBase]: 28518/42886 cut-off events. [2023-11-21 22:23:28,040 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-21 22:23:28,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83336 conditions, 42886 events. 28518/42886 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 3457. Compared 363046 event pairs, 25234 based on Foata normal form. 0/19368 useless extension candidates. Maximal degree in co-relation 83325. Up to 34968 conditions per place. [2023-11-21 22:23:28,442 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 71 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-21 22:23:28,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 340 flow [2023-11-21 22:23:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:23:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-21 22:23:28,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2023-11-21 22:23:28,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-21 22:23:28,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-21 22:23:28,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:28,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-21 22:23:28,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 22:23:28,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:28,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:28,454 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 146 flow. Second operand 3 states and 146 transitions. [2023-11-21 22:23:28,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 340 flow [2023-11-21 22:23:28,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:23:28,655 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 144 flow [2023-11-21 22:23:28,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2023-11-21 22:23:28,657 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -35 predicate places. [2023-11-21 22:23:28,658 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 144 flow [2023-11-21 22:23:28,658 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 22:23:28,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:28,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:23:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:23:28,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:28,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 914573745, now seen corresponding path program 1 times [2023-11-21 22:23:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:28,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086096802] [2023-11-21 22:23:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:28,816 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 22:23:28,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:28,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086096802] [2023-11-21 22:23:28,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086096802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:28,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:28,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:23:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738400427] [2023-11-21 22:23:28,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:28,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 106 [2023-11-21 22:23:28,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 22:23:28,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:28,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 106 [2023-11-21 22:23:28,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:35,174 INFO L124 PetriNetUnfolderBase]: 28514/42878 cut-off events. [2023-11-21 22:23:35,174 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-11-21 22:23:35,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83323 conditions, 42878 events. 28514/42878 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 3457. Compared 365677 event pairs, 25230 based on Foata normal form. 5/19356 useless extension candidates. Maximal degree in co-relation 83313. Up to 34959 conditions per place. [2023-11-21 22:23:35,442 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 70 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-11-21 22:23:35,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 336 flow [2023-11-21 22:23:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:23:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-21 22:23:35,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-11-21 22:23:35,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-21 22:23:35,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-21 22:23:35,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:35,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-21 22:23:35,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 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 22:23:35,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:35,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:35,448 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 144 flow. Second operand 3 states and 148 transitions. [2023-11-21 22:23:35,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 336 flow [2023-11-21 22:23:35,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:23:35,586 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 142 flow [2023-11-21 22:23:35,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-21 22:23:35,589 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -36 predicate places. [2023-11-21 22:23:35,589 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 142 flow [2023-11-21 22:23:35,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 22:23:35,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:35,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:23:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:23:35,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:35,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash 914576941, now seen corresponding path program 1 times [2023-11-21 22:23:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:35,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681293388] [2023-11-21 22:23:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:35,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:35,712 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 22:23:35,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:35,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681293388] [2023-11-21 22:23:35,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681293388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:35,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:35,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:23:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063414962] [2023-11-21 22:23:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:35,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:23:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:23:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:23:35,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 106 [2023-11-21 22:23:35,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 22:23:35,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:35,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 106 [2023-11-21 22:23:35,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:38,456 INFO L124 PetriNetUnfolderBase]: 10405/16139 cut-off events. [2023-11-21 22:23:38,456 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-11-21 22:23:38,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31259 conditions, 16139 events. 10405/16139 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 1207. Compared 127104 event pairs, 8045 based on Foata normal form. 0/9164 useless extension candidates. Maximal degree in co-relation 31248. Up to 10483 conditions per place. [2023-11-21 22:23:38,547 INFO L140 encePairwiseOnDemand]: 93/106 looper letters, 60 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-11-21 22:23:38,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 80 transitions, 294 flow [2023-11-21 22:23:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:23:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-21 22:23:38,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2023-11-21 22:23:38,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-21 22:23:38,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-21 22:23:38,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:38,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-21 22:23:38,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 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 22:23:38,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:38,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:38,554 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 142 flow. Second operand 3 states and 148 transitions. [2023-11-21 22:23:38,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 80 transitions, 294 flow [2023-11-21 22:23:38,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:23:38,565 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 154 flow [2023-11-21 22:23:38,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2023-11-21 22:23:38,566 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -38 predicate places. [2023-11-21 22:23:38,566 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 154 flow [2023-11-21 22:23:38,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 22:23:38,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:38,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:23:38,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:23:38,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:38,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 914576942, now seen corresponding path program 1 times [2023-11-21 22:23:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127652717] [2023-11-21 22:23:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:38,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:38,732 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 22:23:38,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:38,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127652717] [2023-11-21 22:23:38,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127652717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:38,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:23:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923152087] [2023-11-21 22:23:38,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:23:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:23:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:23:38,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 106 [2023-11-21 22:23:38,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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 22:23:38,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:38,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 106 [2023-11-21 22:23:38,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:39,685 INFO L124 PetriNetUnfolderBase]: 2242/3679 cut-off events. [2023-11-21 22:23:39,685 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-11-21 22:23:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7719 conditions, 3679 events. 2242/3679 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25302 event pairs, 1550 based on Foata normal form. 0/3362 useless extension candidates. Maximal degree in co-relation 7707. Up to 1747 conditions per place. [2023-11-21 22:23:39,708 INFO L140 encePairwiseOnDemand]: 93/106 looper letters, 40 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-21 22:23:39,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 234 flow [2023-11-21 22:23:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:23:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:23:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2023-11-21 22:23:39,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891509433962264 [2023-11-21 22:23:39,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 165 transitions. [2023-11-21 22:23:39,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 165 transitions. [2023-11-21 22:23:39,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:39,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 165 transitions. [2023-11-21 22:23:39,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 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 22:23:39,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:23:39,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:23:39,713 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 154 flow. Second operand 4 states and 165 transitions. [2023-11-21 22:23:39,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 234 flow [2023-11-21 22:23:39,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:23:39,718 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 132 flow [2023-11-21 22:23:39,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-11-21 22:23:39,719 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -48 predicate places. [2023-11-21 22:23:39,720 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 132 flow [2023-11-21 22:23:39,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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 22:23:39,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:39,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:39,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:23:39,721 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:39,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1205109853, now seen corresponding path program 1 times [2023-11-21 22:23:39,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:39,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642288191] [2023-11-21 22:23:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:39,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:39,789 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 22:23:39,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:39,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642288191] [2023-11-21 22:23:39,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642288191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:39,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:39,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:23:39,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405762836] [2023-11-21 22:23:39,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:39,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:39,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:39,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:39,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 106 [2023-11-21 22:23:39,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 22:23:39,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:39,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 106 [2023-11-21 22:23:39,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:40,477 INFO L124 PetriNetUnfolderBase]: 2259/3681 cut-off events. [2023-11-21 22:23:40,477 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-11-21 22:23:40,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7750 conditions, 3681 events. 2259/3681 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25153 event pairs, 1548 based on Foata normal form. 0/3382 useless extension candidates. Maximal degree in co-relation 7738. Up to 1747 conditions per place. [2023-11-21 22:23:40,498 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 41 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-21 22:23:40,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 234 flow [2023-11-21 22:23:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:23:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2023-11-21 22:23:40,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36477987421383645 [2023-11-21 22:23:40,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2023-11-21 22:23:40,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2023-11-21 22:23:40,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:40,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2023-11-21 22:23:40,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 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 22:23:40,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:40,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:40,503 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 132 flow. Second operand 3 states and 116 transitions. [2023-11-21 22:23:40,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 234 flow [2023-11-21 22:23:40,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:23:40,508 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 131 flow [2023-11-21 22:23:40,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2023-11-21 22:23:40,510 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -49 predicate places. [2023-11-21 22:23:40,510 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 131 flow [2023-11-21 22:23:40,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 22:23:40,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:40,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:40,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:23:40,511 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:40,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:40,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1205109852, now seen corresponding path program 1 times [2023-11-21 22:23:40,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:40,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383307447] [2023-11-21 22:23:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:40,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:40,601 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 22:23:40,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:40,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383307447] [2023-11-21 22:23:40,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383307447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:40,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:40,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:23:40,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101108226] [2023-11-21 22:23:40,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:40,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:40,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:40,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 106 [2023-11-21 22:23:40,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 22:23:40,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:40,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 106 [2023-11-21 22:23:40,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:41,346 INFO L124 PetriNetUnfolderBase]: 2242/3655 cut-off events. [2023-11-21 22:23:41,346 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-21 22:23:41,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7766 conditions, 3655 events. 2242/3655 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25005 event pairs, 1236 based on Foata normal form. 12/3368 useless extension candidates. Maximal degree in co-relation 7755. Up to 1718 conditions per place. [2023-11-21 22:23:41,369 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 40 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-21 22:23:41,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 231 flow [2023-11-21 22:23:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:23:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-21 22:23:41,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710691823899371 [2023-11-21 22:23:41,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-21 22:23:41,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-21 22:23:41,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:41,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-21 22:23:41,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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 22:23:41,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:41,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:41,374 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 131 flow. Second operand 3 states and 118 transitions. [2023-11-21 22:23:41,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 231 flow [2023-11-21 22:23:41,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:23:41,376 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 129 flow [2023-11-21 22:23:41,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-11-21 22:23:41,377 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -50 predicate places. [2023-11-21 22:23:41,378 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 129 flow [2023-11-21 22:23:41,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 22:23:41,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:41,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:41,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:23:41,378 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:41,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash -171872141, now seen corresponding path program 1 times [2023-11-21 22:23:41,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:41,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103564214] [2023-11-21 22:23:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:41,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:41,654 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 22:23:41,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:41,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103564214] [2023-11-21 22:23:41,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103564214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:41,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:41,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:23:41,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943407327] [2023-11-21 22:23:41,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:41,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:41,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:23:41,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 106 [2023-11-21 22:23:41,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 22:23:41,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:41,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 106 [2023-11-21 22:23:41,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:23:42,389 INFO L124 PetriNetUnfolderBase]: 2140/4120 cut-off events. [2023-11-21 22:23:42,389 INFO L125 PetriNetUnfolderBase]: For 277/277 co-relation queries the response was YES. [2023-11-21 22:23:42,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8089 conditions, 4120 events. 2140/4120 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31483 event pairs, 704 based on Foata normal form. 0/3862 useless extension candidates. Maximal degree in co-relation 8078. Up to 2109 conditions per place. [2023-11-21 22:23:42,411 INFO L140 encePairwiseOnDemand]: 102/106 looper letters, 57 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-21 22:23:42,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 323 flow [2023-11-21 22:23:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:23:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-21 22:23:42,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371069182389937 [2023-11-21 22:23:42,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-21 22:23:42,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-21 22:23:42,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:23:42,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-21 22:23:42,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 22:23:42,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:42,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 22:23:42,416 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 129 flow. Second operand 3 states and 139 transitions. [2023-11-21 22:23:42,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 323 flow [2023-11-21 22:23:42,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:23:42,421 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 135 flow [2023-11-21 22:23:42,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2023-11-21 22:23:42,425 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -49 predicate places. [2023-11-21 22:23:42,425 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 135 flow [2023-11-21 22:23:42,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 22:23:42,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:23:42,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:42,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:23:42,426 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-11-21 22:23:42,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1960246970, now seen corresponding path program 1 times [2023-11-21 22:23:42,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:42,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542867015] [2023-11-21 22:23:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:42,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:42,559 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 22:23:42,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542867015] [2023-11-21 22:23:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542867015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:42,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:42,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:23:42,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118439855] [2023-11-21 22:23:42,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:23:42,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:42,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:23:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:23:42,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 106 [2023-11-21 22:23:42,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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 22:23:42,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:23:42,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 106 [2023-11-21 22:23:42,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand