./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.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_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/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_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/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_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/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 bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:28:29,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:28:29,822 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:28:29,831 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:28:29,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:28:29,872 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:28:29,873 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:28:29,874 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:28:29,875 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:28:29,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:28:29,880 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:28:29,881 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:28:29,881 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:28:29,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:28:29,883 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:28:29,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:28:29,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:28:29,885 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:28:29,885 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:28:29,886 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:28:29,886 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:28:29,887 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:28:29,887 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:28:29,887 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:28:29,888 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:28:29,888 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:28:29,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:28:29,889 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:28:29,890 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:28:29,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:28:29,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:28:29,892 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:28:29,892 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:28:29,892 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:28:29,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:28:29,893 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:28:29,893 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:28:29,893 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:28:29,894 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:28:29,894 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_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa [2023-11-21 22:28:30,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:28:30,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:28:30,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:28:30,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:28:30,192 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:28:30,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2023-11-21 22:28:33,339 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:28:33,666 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:28:33,666 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2023-11-21 22:28:33,701 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/data/10e70a92b/57bf026e2337492cba9c812b7d2e4359/FLAG2d527021c [2023-11-21 22:28:33,726 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/data/10e70a92b/57bf026e2337492cba9c812b7d2e4359 [2023-11-21 22:28:33,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:28:33,735 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:28:33,743 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:28:33,743 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:28:33,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:28:33,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:28:33" (1/1) ... [2023-11-21 22:28:33,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@134976ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:33, skipping insertion in model container [2023-11-21 22:28:33,752 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:28:33" (1/1) ... [2023-11-21 22:28:33,830 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:28:34,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:28:34,602 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:28:34,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:28:34,807 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:28:34,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34 WrapperNode [2023-11-21 22:28:34,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:28:34,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:28:34,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:28:34,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:28:34,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,866 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,920 INFO L138 Inliner]: procedures = 372, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 127 [2023-11-21 22:28:34,921 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:28:34,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:28:34,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:28:34,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:28:34,933 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,970 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:34,980 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:35,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:28:35,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:28:35,002 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:28:35,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:28:35,003 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (1/1) ... [2023-11-21 22:28:35,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:28:35,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:28:35,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:28:35,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:28:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:28:35,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:28:35,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:28:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 22:28:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:28:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:28:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 22:28:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:28:35,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:28:35,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:28:35,098 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-21 22:28:35,099 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-21 22:28:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:28:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:28:35,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:28:35,101 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 22:28:35,324 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:28:35,327 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:28:35,931 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:28:36,199 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:28:36,199 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:28:36,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:28:36 BoogieIcfgContainer [2023-11-21 22:28:36,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:28:36,205 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:28:36,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:28:36,209 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:28:36,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:28:33" (1/3) ... [2023-11-21 22:28:36,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbb3124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:28:36, skipping insertion in model container [2023-11-21 22:28:36,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:28:34" (2/3) ... [2023-11-21 22:28:36,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbb3124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:28:36, skipping insertion in model container [2023-11-21 22:28:36,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:28:36" (3/3) ... [2023-11-21 22:28:36,213 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_09-arraylist.i [2023-11-21 22:28:36,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:28:36,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-21 22:28:36,236 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:28:36,306 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:28:36,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 152 flow [2023-11-21 22:28:36,393 INFO L124 PetriNetUnfolderBase]: 1/73 cut-off events. [2023-11-21 22:28:36,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:28:36,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 73 events. 1/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 286 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-21 22:28:36,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 152 flow [2023-11-21 22:28:36,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 73 transitions, 149 flow [2023-11-21 22:28:36,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:28:36,421 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;@4d2b5aa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:28:36,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-21 22:28:36,426 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:28:36,426 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 22:28:36,427 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:28:36,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:36,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:28:36,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:36,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:36,434 INFO L85 PathProgramCache]: Analyzing trace with hash 398674, now seen corresponding path program 1 times [2023-11-21 22:28:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:36,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596199402] [2023-11-21 22:28:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:36,778 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 22:28:36,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596199402] [2023-11-21 22:28:36,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596199402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:36,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:36,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:36,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256604661] [2023-11-21 22:28:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:36,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:28:36,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:28:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:28:36,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 74 [2023-11-21 22:28:36,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 22:28:36,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:36,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 74 [2023-11-21 22:28:36,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:37,091 INFO L124 PetriNetUnfolderBase]: 64/265 cut-off events. [2023-11-21 22:28:37,092 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:28:37,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 265 events. 64/265 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1336 event pairs, 63 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 377. Up to 151 conditions per place. [2023-11-21 22:28:37,098 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 24 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-11-21 22:28:37,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 197 flow [2023-11-21 22:28:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:28:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:28:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-21 22:28:37,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2023-11-21 22:28:37,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-21 22:28:37,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-21 22:28:37,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:37,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-21 22:28:37,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 22:28:37,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 22:28:37,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 22:28:37,175 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 149 flow. Second operand 3 states and 158 transitions. [2023-11-21 22:28:37,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 197 flow [2023-11-21 22:28:37,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:28:37,191 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 148 flow [2023-11-21 22:28:37,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-11-21 22:28:37,208 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2023-11-21 22:28:37,208 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 148 flow [2023-11-21 22:28:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 22:28:37,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:37,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:28:37,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:28:37,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:37,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash 398675, now seen corresponding path program 1 times [2023-11-21 22:28:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:37,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802498638] [2023-11-21 22:28:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:37,460 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 22:28:37,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:37,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802498638] [2023-11-21 22:28:37,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802498638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:37,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:37,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:37,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34697295] [2023-11-21 22:28:37,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:37,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:28:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:37,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:28:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:28:37,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 74 [2023-11-21 22:28:37,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 22:28:37,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:37,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 74 [2023-11-21 22:28:37,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:37,697 INFO L124 PetriNetUnfolderBase]: 64/261 cut-off events. [2023-11-21 22:28:37,698 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:28:37,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 261 events. 64/261 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1325 event pairs, 63 based on Foata normal form. 4/208 useless extension candidates. Maximal degree in co-relation 388. Up to 151 conditions per place. [2023-11-21 22:28:37,703 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 22 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-11-21 22:28:37,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 192 flow [2023-11-21 22:28:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:28:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:28:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-21 22:28:37,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2023-11-21 22:28:37,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-21 22:28:37,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-21 22:28:37,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:37,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-21 22:28:37,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 22:28:37,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 22:28:37,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 22:28:37,711 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 148 flow. Second operand 3 states and 162 transitions. [2023-11-21 22:28:37,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 192 flow [2023-11-21 22:28:37,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:28:37,714 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 140 flow [2023-11-21 22:28:37,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2023-11-21 22:28:37,716 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -7 predicate places. [2023-11-21 22:28:37,716 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 140 flow [2023-11-21 22:28:37,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 22:28:37,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:37,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 22:28:37,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:28:37,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:37,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:37,718 INFO L85 PathProgramCache]: Analyzing trace with hash 398640, now seen corresponding path program 1 times [2023-11-21 22:28:37,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:37,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116336236] [2023-11-21 22:28:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:37,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:37,768 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 22:28:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:37,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116336236] [2023-11-21 22:28:37,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116336236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:37,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:37,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:37,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370258555] [2023-11-21 22:28:37,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:37,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:28:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:28:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:28:37,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-21 22:28:37,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 140 flow. Second operand has 3 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 22:28:37,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:37,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-21 22:28:37,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:37,906 INFO L124 PetriNetUnfolderBase]: 64/281 cut-off events. [2023-11-21 22:28:37,907 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-21 22:28:37,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 281 events. 64/281 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1345 event pairs, 63 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 401. Up to 153 conditions per place. [2023-11-21 22:28:37,911 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 31 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-21 22:28:37,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 72 transitions, 228 flow [2023-11-21 22:28:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:28:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:28:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-11-21 22:28:37,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8018018018018018 [2023-11-21 22:28:37,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-11-21 22:28:37,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-11-21 22:28:37,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:37,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-11-21 22:28:37,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 22:28:37,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 22:28:37,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 22:28:37,925 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 140 flow. Second operand 3 states and 178 transitions. [2023-11-21 22:28:37,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 72 transitions, 228 flow [2023-11-21 22:28:37,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:28:37,931 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 144 flow [2023-11-21 22:28:37,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2023-11-21 22:28:37,933 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -6 predicate places. [2023-11-21 22:28:37,934 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 144 flow [2023-11-21 22:28:37,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 22:28:37,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:37,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:28:37,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:28:37,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:37,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash 383136850, now seen corresponding path program 1 times [2023-11-21 22:28:37,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:37,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582191696] [2023-11-21 22:28:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:38,271 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 22:28:38,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:38,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582191696] [2023-11-21 22:28:38,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582191696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:38,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:38,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:28:38,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848822081] [2023-11-21 22:28:38,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:38,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:28:38,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:28:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:28:38,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-21 22:28:38,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 22:28:38,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:38,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-21 22:28:38,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:38,589 INFO L124 PetriNetUnfolderBase]: 74/302 cut-off events. [2023-11-21 22:28:38,590 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:28:38,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 302 events. 74/302 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1441 event pairs, 55 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 462. Up to 144 conditions per place. [2023-11-21 22:28:38,597 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 38 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-21 22:28:38,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 236 flow [2023-11-21 22:28:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:28:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:28:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2023-11-21 22:28:38,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7477477477477478 [2023-11-21 22:28:38,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2023-11-21 22:28:38,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2023-11-21 22:28:38,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:38,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2023-11-21 22:28:38,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 22:28:38,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 22:28:38,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 22:28:38,604 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 144 flow. Second operand 3 states and 166 transitions. [2023-11-21 22:28:38,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 236 flow [2023-11-21 22:28:38,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:28:38,610 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 144 flow [2023-11-21 22:28:38,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=144, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-11-21 22:28:38,612 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -7 predicate places. [2023-11-21 22:28:38,613 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 144 flow [2023-11-21 22:28:38,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 22:28:38,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:38,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:28:38,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:28:38,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:38,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash 383136851, now seen corresponding path program 1 times [2023-11-21 22:28:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:38,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208214893] [2023-11-21 22:28:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:38,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:38,908 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 22:28:38,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208214893] [2023-11-21 22:28:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208214893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:38,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:38,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:28:38,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982837551] [2023-11-21 22:28:38,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:38,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:28:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:38,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:28:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:28:39,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 74 [2023-11-21 22:28:39,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 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 22:28:39,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:39,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 74 [2023-11-21 22:28:39,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:39,242 INFO L124 PetriNetUnfolderBase]: 64/269 cut-off events. [2023-11-21 22:28:39,243 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-21 22:28:39,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 269 events. 64/269 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1282 event pairs, 63 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 399. Up to 155 conditions per place. [2023-11-21 22:28:39,246 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 29 selfloop transitions, 6 changer transitions 0/69 dead transitions. [2023-11-21 22:28:39,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 226 flow [2023-11-21 22:28:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:28:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:28:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2023-11-21 22:28:39,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7216216216216216 [2023-11-21 22:28:39,249 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 267 transitions. [2023-11-21 22:28:39,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 267 transitions. [2023-11-21 22:28:39,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:39,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 267 transitions. [2023-11-21 22:28:39,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 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 22:28:39,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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 22:28:39,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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 22:28:39,253 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 144 flow. Second operand 5 states and 267 transitions. [2023-11-21 22:28:39,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 226 flow [2023-11-21 22:28:39,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:28:39,257 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 182 flow [2023-11-21 22:28:39,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2023-11-21 22:28:39,258 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2023-11-21 22:28:39,259 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 182 flow [2023-11-21 22:28:39,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 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 22:28:39,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:39,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:39,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:28:39,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:39,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1645714685, now seen corresponding path program 1 times [2023-11-21 22:28:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:39,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614204550] [2023-11-21 22:28:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:39,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:39,678 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 22:28:39,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:39,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614204550] [2023-11-21 22:28:39,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614204550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:39,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:39,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:28:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673065786] [2023-11-21 22:28:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:39,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:28:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:28:39,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:28:39,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2023-11-21 22:28:39,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 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 22:28:39,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:39,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2023-11-21 22:28:39,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:40,201 INFO L124 PetriNetUnfolderBase]: 78/289 cut-off events. [2023-11-21 22:28:40,202 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 22:28:40,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 289 events. 78/289 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1300 event pairs, 77 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 482. Up to 179 conditions per place. [2023-11-21 22:28:40,205 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 25 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-11-21 22:28:40,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 252 flow [2023-11-21 22:28:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:28:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:28:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 322 transitions. [2023-11-21 22:28:40,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543918918918919 [2023-11-21 22:28:40,208 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 322 transitions. [2023-11-21 22:28:40,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 322 transitions. [2023-11-21 22:28:40,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:40,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 322 transitions. [2023-11-21 22:28:40,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 40.25) internal successors, (322), 8 states have internal predecessors, (322), 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 22:28:40,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 74.0) internal successors, (666), 9 states have internal predecessors, (666), 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 22:28:40,212 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 74.0) internal successors, (666), 9 states have internal predecessors, (666), 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 22:28:40,213 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 182 flow. Second operand 8 states and 322 transitions. [2023-11-21 22:28:40,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 252 flow [2023-11-21 22:28:40,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:28:40,216 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 198 flow [2023-11-21 22:28:40,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=198, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2023-11-21 22:28:40,217 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2023-11-21 22:28:40,218 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 198 flow [2023-11-21 22:28:40,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 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 22:28:40,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:40,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:40,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:28:40,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:40,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1645714684, now seen corresponding path program 1 times [2023-11-21 22:28:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034380050] [2023-11-21 22:28:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:40,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:40,834 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 22:28:40,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:40,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034380050] [2023-11-21 22:28:40,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034380050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:40,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:40,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:28:40,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182103540] [2023-11-21 22:28:40,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:40,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:28:40,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:28:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:28:41,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2023-11-21 22:28:41,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 33.125) internal successors, (265), 8 states have internal predecessors, (265), 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 22:28:41,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:41,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2023-11-21 22:28:41,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:41,726 INFO L124 PetriNetUnfolderBase]: 78/285 cut-off events. [2023-11-21 22:28:41,726 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-21 22:28:41,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 285 events. 78/285 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1290 event pairs, 77 based on Foata normal form. 2/250 useless extension candidates. Maximal degree in co-relation 483. Up to 179 conditions per place. [2023-11-21 22:28:41,729 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 25 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2023-11-21 22:28:41,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 63 transitions, 268 flow [2023-11-21 22:28:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:28:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:28:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 290 transitions. [2023-11-21 22:28:41,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48986486486486486 [2023-11-21 22:28:41,732 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 290 transitions. [2023-11-21 22:28:41,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 290 transitions. [2023-11-21 22:28:41,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:41,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 290 transitions. [2023-11-21 22:28:41,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.25) internal successors, (290), 8 states have internal predecessors, (290), 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 22:28:41,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 74.0) internal successors, (666), 9 states have internal predecessors, (666), 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 22:28:41,736 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 74.0) internal successors, (666), 9 states have internal predecessors, (666), 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 22:28:41,736 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 198 flow. Second operand 8 states and 290 transitions. [2023-11-21 22:28:41,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 63 transitions, 268 flow [2023-11-21 22:28:41,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-21 22:28:41,740 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 194 flow [2023-11-21 22:28:41,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=194, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2023-11-21 22:28:41,741 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -1 predicate places. [2023-11-21 22:28:41,741 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 194 flow [2023-11-21 22:28:41,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.125) internal successors, (265), 8 states have internal predecessors, (265), 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 22:28:41,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:41,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:41,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:28:41,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:41,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:41,743 INFO L85 PathProgramCache]: Analyzing trace with hash -983832572, now seen corresponding path program 1 times [2023-11-21 22:28:41,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:41,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327429783] [2023-11-21 22:28:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:41,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:42,038 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 22:28:42,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:42,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327429783] [2023-11-21 22:28:42,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327429783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:42,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:42,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:28:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036064613] [2023-11-21 22:28:42,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:42,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:28:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:28:42,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:28:42,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-21 22:28:42,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 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 22:28:42,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:42,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-21 22:28:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:42,358 INFO L124 PetriNetUnfolderBase]: 64/259 cut-off events. [2023-11-21 22:28:42,359 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-21 22:28:42,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 259 events. 64/259 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1201 event pairs, 63 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 422. Up to 150 conditions per place. [2023-11-21 22:28:42,361 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 20 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2023-11-21 22:28:42,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 62 transitions, 254 flow [2023-11-21 22:28:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:28:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:28:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2023-11-21 22:28:42,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654054054054054 [2023-11-21 22:28:42,364 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 242 transitions. [2023-11-21 22:28:42,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 242 transitions. [2023-11-21 22:28:42,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:42,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 242 transitions. [2023-11-21 22:28:42,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 22:28:42,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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 22:28:42,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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 22:28:42,368 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 194 flow. Second operand 5 states and 242 transitions. [2023-11-21 22:28:42,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 62 transitions, 254 flow [2023-11-21 22:28:42,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 230 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-21 22:28:42,371 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 190 flow [2023-11-21 22:28:42,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-11-21 22:28:42,373 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -5 predicate places. [2023-11-21 22:28:42,373 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 190 flow [2023-11-21 22:28:42,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 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 22:28:42,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:42,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:28:42,374 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:42,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash -983832573, now seen corresponding path program 1 times [2023-11-21 22:28:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:42,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318073381] [2023-11-21 22:28:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:42,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:42,495 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 22:28:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318073381] [2023-11-21 22:28:42,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318073381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:28:42,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:28:42,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:28:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651691596] [2023-11-21 22:28:42,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:28:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:28:42,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:28:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:28:42,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-21 22:28:42,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 22:28:42,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:42,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-21 22:28:42,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:42,837 INFO L124 PetriNetUnfolderBase]: 64/257 cut-off events. [2023-11-21 22:28:42,838 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-21 22:28:42,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 257 events. 64/257 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1185 event pairs, 63 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 422. Up to 150 conditions per place. [2023-11-21 22:28:42,841 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 22 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2023-11-21 22:28:42,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 61 transitions, 254 flow [2023-11-21 22:28:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:28:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:28:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2023-11-21 22:28:42,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324324324324324 [2023-11-21 22:28:42,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 234 transitions. [2023-11-21 22:28:42,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 234 transitions. [2023-11-21 22:28:42,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:42,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 234 transitions. [2023-11-21 22:28:42,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 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 22:28:42,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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 22:28:42,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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 22:28:42,848 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 190 flow. Second operand 5 states and 234 transitions. [2023-11-21 22:28:42,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 61 transitions, 254 flow [2023-11-21 22:28:42,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:28:42,852 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 188 flow [2023-11-21 22:28:42,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-11-21 22:28:42,853 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -6 predicate places. [2023-11-21 22:28:42,853 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 188 flow [2023-11-21 22:28:42,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 22:28:42,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:42,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:42,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:28:42,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:42,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash -570284254, now seen corresponding path program 1 times [2023-11-21 22:28:42,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:42,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701481455] [2023-11-21 22:28:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:42,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:42,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:42,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701481455] [2023-11-21 22:28:42,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701481455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:28:42,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844165297] [2023-11-21 22:28:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:42,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:42,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:28:42,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:28:42,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:28:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:43,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:28:43,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:28:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:43,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:28:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:43,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844165297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:28:43,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:28:43,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-21 22:28:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627148842] [2023-11-21 22:28:43,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:28:43,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:28:43,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:43,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:28:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:28:43,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-21 22:28:43,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 188 flow. Second operand has 7 states, 7 states have (on average 51.714285714285715) internal successors, (362), 7 states have internal predecessors, (362), 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 22:28:43,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:43,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-21 22:28:43,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:43,495 INFO L124 PetriNetUnfolderBase]: 64/282 cut-off events. [2023-11-21 22:28:43,495 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-21 22:28:43,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 282 events. 64/282 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1128 event pairs, 63 based on Foata normal form. 3/241 useless extension candidates. Maximal degree in co-relation 420. Up to 146 conditions per place. [2023-11-21 22:28:43,498 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 42 selfloop transitions, 6 changer transitions 0/78 dead transitions. [2023-11-21 22:28:43,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 78 transitions, 368 flow [2023-11-21 22:28:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:28:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:28:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2023-11-21 22:28:43,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7635135135135135 [2023-11-21 22:28:43,501 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 339 transitions. [2023-11-21 22:28:43,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 339 transitions. [2023-11-21 22:28:43,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:43,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 339 transitions. [2023-11-21 22:28:43,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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 22:28:43,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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 22:28:43,507 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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 22:28:43,507 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 188 flow. Second operand 6 states and 339 transitions. [2023-11-21 22:28:43,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 78 transitions, 368 flow [2023-11-21 22:28:43,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 78 transitions, 318 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:28:43,513 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 208 flow [2023-11-21 22:28:43,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-11-21 22:28:43,517 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -1 predicate places. [2023-11-21 22:28:43,517 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 208 flow [2023-11-21 22:28:43,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.714285714285715) internal successors, (362), 7 states have internal predecessors, (362), 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 22:28:43,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:43,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:28:43,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:28:43,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:43,734 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:43,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1712689605, now seen corresponding path program 1 times [2023-11-21 22:28:43,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:43,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959670582] [2023-11-21 22:28:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:43,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:44,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959670582] [2023-11-21 22:28:44,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959670582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:28:44,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973719246] [2023-11-21 22:28:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:44,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:44,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:28:44,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:28:44,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:28:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:44,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 22:28:44,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:28:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:28:44,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:44,806 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:28:44,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:28:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:28:44,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:28:44,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:45,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:28:45,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:45,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:28:45,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:28:45,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-21 22:28:45,722 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:28:45,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-21 22:28:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:46,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973719246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:28:46,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:28:46,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-21 22:28:46,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880287982] [2023-11-21 22:28:46,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:28:46,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:28:46,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:28:46,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:28:48,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-21 22:28:48,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 208 flow. Second operand has 16 states, 16 states have (on average 43.0625) internal successors, (689), 16 states have internal predecessors, (689), 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 22:28:48,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:48,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-21 22:28:48,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:49,248 INFO L124 PetriNetUnfolderBase]: 74/315 cut-off events. [2023-11-21 22:28:49,249 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-21 22:28:49,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 315 events. 74/315 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1342 event pairs, 73 based on Foata normal form. 4/271 useless extension candidates. Maximal degree in co-relation 470. Up to 172 conditions per place. [2023-11-21 22:28:49,252 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 50 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2023-11-21 22:28:49,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 390 flow [2023-11-21 22:28:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:28:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:28:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2023-11-21 22:28:49,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776061776061776 [2023-11-21 22:28:49,256 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 351 transitions. [2023-11-21 22:28:49,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 351 transitions. [2023-11-21 22:28:49,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:49,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 351 transitions. [2023-11-21 22:28:49,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 50.142857142857146) internal successors, (351), 7 states have internal predecessors, (351), 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 22:28:49,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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 22:28:49,261 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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 22:28:49,261 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 208 flow. Second operand 7 states and 351 transitions. [2023-11-21 22:28:49,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 390 flow [2023-11-21 22:28:49,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 83 transitions, 378 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-21 22:28:49,266 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 236 flow [2023-11-21 22:28:49,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2023-11-21 22:28:49,267 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 7 predicate places. [2023-11-21 22:28:49,267 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 236 flow [2023-11-21 22:28:49,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 43.0625) internal successors, (689), 16 states have internal predecessors, (689), 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 22:28:49,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:49,268 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2023-11-21 22:28:49,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:28:49,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:49,485 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:49,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash -263899656, now seen corresponding path program 2 times [2023-11-21 22:28:49,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:49,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260750719] [2023-11-21 22:28:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:49,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:49,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:49,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260750719] [2023-11-21 22:28:49,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260750719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:28:49,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958233993] [2023-11-21 22:28:49,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:28:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:28:49,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:28:49,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:28:50,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:28:50,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:28:50,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:28:50,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:28:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:50,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:28:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:50,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958233993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:28:50,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:28:50,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-21 22:28:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055804890] [2023-11-21 22:28:50,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:28:50,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:28:50,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:28:50,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:28:50,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:28:50,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-21 22:28:50,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 236 flow. Second operand has 13 states, 13 states have (on average 53.23076923076923) internal successors, (692), 13 states have internal predecessors, (692), 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 22:28:50,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:28:50,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-21 22:28:50,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:28:50,702 INFO L124 PetriNetUnfolderBase]: 64/342 cut-off events. [2023-11-21 22:28:50,702 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-11-21 22:28:50,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 342 events. 64/342 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1131 event pairs, 63 based on Foata normal form. 6/304 useless extension candidates. Maximal degree in co-relation 615. Up to 146 conditions per place. [2023-11-21 22:28:50,705 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 78 selfloop transitions, 12 changer transitions 0/119 dead transitions. [2023-11-21 22:28:50,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 119 transitions, 656 flow [2023-11-21 22:28:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:28:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:28:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 672 transitions. [2023-11-21 22:28:50,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2023-11-21 22:28:50,709 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 672 transitions. [2023-11-21 22:28:50,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 672 transitions. [2023-11-21 22:28:50,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:28:50,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 672 transitions. [2023-11-21 22:28:50,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 56.0) internal successors, (672), 12 states have internal predecessors, (672), 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 22:28:50,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 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 22:28:50,714 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 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 22:28:50,715 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 236 flow. Second operand 12 states and 672 transitions. [2023-11-21 22:28:50,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 119 transitions, 656 flow [2023-11-21 22:28:50,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 635 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:28:50,720 INFO L231 Difference]: Finished difference. Result has 97 places, 71 transitions, 325 flow [2023-11-21 22:28:50,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=325, PETRI_PLACES=97, PETRI_TRANSITIONS=71} [2023-11-21 22:28:50,721 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 21 predicate places. [2023-11-21 22:28:50,721 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 71 transitions, 325 flow [2023-11-21 22:28:50,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 53.23076923076923) internal successors, (692), 13 states have internal predecessors, (692), 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 22:28:50,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:28:50,722 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2023-11-21 22:28:50,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:28:50,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:28:50,941 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-21 22:28:50,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:28:50,941 INFO L85 PathProgramCache]: Analyzing trace with hash -204455141, now seen corresponding path program 2 times [2023-11-21 22:28:50,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:28:50,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346328142] [2023-11-21 22:28:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:28:50,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:28:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:28:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:28:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346328142] [2023-11-21 22:28:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346328142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:28:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940415788] [2023-11-21 22:28:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:28:56,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:28:56,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:28:56,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:28:56,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cfaae0f-4f1d-40bb-9703-0e0afeaf624a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:28:56,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:28:56,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:28:56,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 111 conjunts are in the unsatisfiable core [2023-11-21 22:28:56,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:28:56,564 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:28:56,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:28:56,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:56,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:28:56,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:56,768 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:28:56,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:28:56,808 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:28:56,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:28:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:28:57,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:57,147 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:28:57,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:28:57,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:57,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:28:57,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:57,517 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:28:57,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:28:57,535 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:28:57,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:28:57,826 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:28:57,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:28:57,844 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:28:57,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:28:58,020 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:28:58,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:28:58,041 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:28:58,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:28:58,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 22:28:58,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-21 22:28:58,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-21 22:28:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:28:58,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:28:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:28:58,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:28:59,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:28:59,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-21 22:28:59,343 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:28:59,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-21 22:29:00,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:29:00,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-21 22:29:00,317 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:29:00,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-21 22:29:00,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:29:00,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-21 22:29:01,143 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:29:01,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-21 22:29:01,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:29:01,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-21 22:29:01,991 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:29:01,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-21 22:29:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:29:02,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940415788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:29:02,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:29:02,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 49 [2023-11-21 22:29:02,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469948319] [2023-11-21 22:29:02,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:29:02,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-21 22:29:02,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:29:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-21 22:29:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2246, Unknown=0, NotChecked=0, Total=2550 [2023-11-21 22:29:21,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 74 [2023-11-21 22:29:21,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 71 transitions, 325 flow. Second operand has 51 states, 51 states have (on average 31.647058823529413) internal successors, (1614), 51 states have internal predecessors, (1614), 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 22:29:21,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:29:21,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 74 [2023-11-21 22:29:21,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand