./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI --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 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:37:37,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:37:37,954 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:37:37,960 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:37:37,961 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:37:37,994 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:37:37,995 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:37:37,996 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:37:37,997 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:37:37,998 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:37:37,999 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:37:38,000 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:37:38,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:37:38,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:37:38,003 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:37:38,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:37:38,005 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:37:38,006 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:37:38,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:37:38,007 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:37:38,008 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:37:38,009 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:37:38,010 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:37:38,011 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:37:38,012 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:37:38,012 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:37:38,013 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:37:38,014 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:37:38,015 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:37:38,015 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:37:38,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:37:38,017 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:37:38,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:37:38,018 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:37:38,019 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:37:38,020 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:37:38,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:37:38,021 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:37:38,022 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:37:38,023 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:37:38,024 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:37:38,025 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_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 [2023-11-24 21:37:38,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:37:38,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:37:38,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:37:38,415 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:37:38,416 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:37:38,417 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread/queue_longest.i [2023-11-24 21:37:42,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:37:42,619 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:37:42,620 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/sv-benchmarks/c/pthread/queue_longest.i [2023-11-24 21:37:42,647 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/data/2b1d3d81b/2b4611aeefa84e79afe753208b1c7d72/FLAGa7be2fef4 [2023-11-24 21:37:42,664 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/data/2b1d3d81b/2b4611aeefa84e79afe753208b1c7d72 [2023-11-24 21:37:42,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:37:42,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:37:42,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:37:42,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:37:42,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:37:42,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:37:42" (1/1) ... [2023-11-24 21:37:42,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4503ee32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:42, skipping insertion in model container [2023-11-24 21:37:42,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:37:42" (1/1) ... [2023-11-24 21:37:42,749 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:37:43,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:37:43,356 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:37:43,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:37:43,498 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:37:43,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43 WrapperNode [2023-11-24 21:37:43,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:37:43,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:37:43,501 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:37:43,501 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:37:43,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,544 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,611 INFO L138 Inliner]: procedures = 275, calls = 66, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 260 [2023-11-24 21:37:43,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:37:43,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:37:43,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:37:43,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:37:43,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,642 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,674 INFO L175 MemorySlicer]: Split 47 memory accesses to 6 slices as follows [2, 2, 5, 4, 32, 2]. 68 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0, 0]. The 20 writes are split as follows [0, 1, 0, 3, 15, 1]. [2023-11-24 21:37:43,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,675 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,697 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,705 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,709 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:37:43,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:37:43,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:37:43,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:37:43,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (1/1) ... [2023-11-24 21:37:43,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:37:43,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:37:43,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:37:43,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b43c9bb-a871-4940-9af7-1761b256166d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:37:43,814 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 21:37:43,815 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 21:37:43,815 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 21:37:43,815 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 21:37:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:37:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:37:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:37:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:37:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:37:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:37:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:37:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:37:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:37:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:37:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:37:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:37:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:37:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:37:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:37:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:37:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:37:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:37:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:37:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:37:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:37:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:37:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:37:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:37:43,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:37:43,827 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:37:44,062 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:37:44,087 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:37:44,744 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:37:44,986 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:37:44,987 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:37:44,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:37:44 BoogieIcfgContainer [2023-11-24 21:37:44,988 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:37:44,990 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:37:44,990 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:37:44,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:37:44,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:37:42" (1/3) ... [2023-11-24 21:37:44,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788cb560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:37:44, skipping insertion in model container [2023-11-24 21:37:44,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:43" (2/3) ... [2023-11-24 21:37:44,996 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788cb560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:37:44, skipping insertion in model container [2023-11-24 21:37:44,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:37:44" (3/3) ... [2023-11-24 21:37:44,998 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2023-11-24 21:37:45,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:37:45,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-24 21:37:45,020 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:37:45,213 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:37:45,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 185 transitions, 384 flow [2023-11-24 21:37:45,375 INFO L124 PetriNetUnfolderBase]: 14/183 cut-off events. [2023-11-24 21:37:45,376 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:37:45,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 14/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 590 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 148. Up to 2 conditions per place. [2023-11-24 21:37:45,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 185 transitions, 384 flow [2023-11-24 21:37:45,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 182 transitions, 376 flow [2023-11-24 21:37:45,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:37:45,428 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;@7b644d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:37:45,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-11-24 21:37:45,433 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:37:45,434 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:37:45,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:37:45,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:45,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:37:45,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:45,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash 22962, now seen corresponding path program 1 times [2023-11-24 21:37:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:45,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242454227] [2023-11-24 21:37:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:45,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242454227] [2023-11-24 21:37:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242454227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:45,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:45,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:37:45,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50249856] [2023-11-24 21:37:45,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:45,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:45,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:46,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 185 [2023-11-24 21:37:46,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 182 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:46,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:46,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 185 [2023-11-24 21:37:46,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:47,265 INFO L124 PetriNetUnfolderBase]: 1797/4866 cut-off events. [2023-11-24 21:37:47,266 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-24 21:37:47,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7803 conditions, 4866 events. 1797/4866 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 39224 event pairs, 1436 based on Foata normal form. 186/3778 useless extension candidates. Maximal degree in co-relation 7607. Up to 2853 conditions per place. [2023-11-24 21:37:47,328 INFO L140 encePairwiseOnDemand]: 175/185 looper letters, 62 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2023-11-24 21:37:47,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 167 transitions, 474 flow [2023-11-24 21:37:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:37:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-11-24 21:37:47,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7081081081081081 [2023-11-24 21:37:47,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-11-24 21:37:47,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-11-24 21:37:47,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:47,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-11-24 21:37:47,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:47,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:47,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:47,381 INFO L175 Difference]: Start difference. First operand has 175 places, 182 transitions, 376 flow. Second operand 3 states and 393 transitions. [2023-11-24 21:37:47,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 167 transitions, 474 flow [2023-11-24 21:37:47,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 167 transitions, 466 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:37:47,394 INFO L231 Difference]: Finished difference. Result has 164 places, 167 transitions, 342 flow [2023-11-24 21:37:47,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=164, PETRI_TRANSITIONS=167} [2023-11-24 21:37:47,402 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -11 predicate places. [2023-11-24 21:37:47,402 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 167 transitions, 342 flow [2023-11-24 21:37:47,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:47,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:47,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:37:47,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:37:47,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:47,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash 22963, now seen corresponding path program 1 times [2023-11-24 21:37:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:47,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19377168] [2023-11-24 21:37:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:47,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:47,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:47,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19377168] [2023-11-24 21:37:47,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19377168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:47,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:47,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:37:47,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470227160] [2023-11-24 21:37:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:47,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:47,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 185 [2023-11-24 21:37:47,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 167 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:47,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:47,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 185 [2023-11-24 21:37:47,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:48,521 INFO L124 PetriNetUnfolderBase]: 1797/4863 cut-off events. [2023-11-24 21:37:48,521 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-24 21:37:48,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7751 conditions, 4863 events. 1797/4863 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 39210 event pairs, 1436 based on Foata normal form. 3/3592 useless extension candidates. Maximal degree in co-relation 7740. Up to 2853 conditions per place. [2023-11-24 21:37:48,572 INFO L140 encePairwiseOnDemand]: 180/185 looper letters, 60 selfloop transitions, 2 changer transitions 0/164 dead transitions. [2023-11-24 21:37:48,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 164 transitions, 460 flow [2023-11-24 21:37:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:37:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-11-24 21:37:48,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7063063063063063 [2023-11-24 21:37:48,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-11-24 21:37:48,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-11-24 21:37:48,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:48,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-11-24 21:37:48,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:48,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:48,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:48,587 INFO L175 Difference]: Start difference. First operand has 164 places, 167 transitions, 342 flow. Second operand 3 states and 392 transitions. [2023-11-24 21:37:48,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 164 transitions, 460 flow [2023-11-24 21:37:48,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 164 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:37:48,601 INFO L231 Difference]: Finished difference. Result has 161 places, 164 transitions, 336 flow [2023-11-24 21:37:48,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=161, PETRI_TRANSITIONS=164} [2023-11-24 21:37:48,604 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -14 predicate places. [2023-11-24 21:37:48,604 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 164 transitions, 336 flow [2023-11-24 21:37:48,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:48,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:48,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:37:48,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:37:48,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:48,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash 684761422, now seen corresponding path program 1 times [2023-11-24 21:37:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:48,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587033417] [2023-11-24 21:37:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:48,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:48,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:48,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587033417] [2023-11-24 21:37:48,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587033417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:48,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:37:48,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810598408] [2023-11-24 21:37:48,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:37:48,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:48,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:37:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:37:49,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 185 [2023-11-24 21:37:49,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 164 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:49,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:49,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 185 [2023-11-24 21:37:49,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:50,110 INFO L124 PetriNetUnfolderBase]: 1797/4861 cut-off events. [2023-11-24 21:37:50,111 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:37:50,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7752 conditions, 4861 events. 1797/4861 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 39200 event pairs, 1436 based on Foata normal form. 0/3590 useless extension candidates. Maximal degree in co-relation 7739. Up to 2852 conditions per place. [2023-11-24 21:37:50,157 INFO L140 encePairwiseOnDemand]: 180/185 looper letters, 62 selfloop transitions, 3 changer transitions 0/162 dead transitions. [2023-11-24 21:37:50,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 162 transitions, 462 flow [2023-11-24 21:37:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:37:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-11-24 21:37:50,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527027027027027 [2023-11-24 21:37:50,160 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-11-24 21:37:50,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-11-24 21:37:50,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:50,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-11-24 21:37:50,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:50,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:50,166 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:50,166 INFO L175 Difference]: Start difference. First operand has 161 places, 164 transitions, 336 flow. Second operand 4 states and 483 transitions. [2023-11-24 21:37:50,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 162 transitions, 462 flow [2023-11-24 21:37:50,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 162 transitions, 458 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:37:50,174 INFO L231 Difference]: Finished difference. Result has 160 places, 162 transitions, 334 flow [2023-11-24 21:37:50,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=160, PETRI_TRANSITIONS=162} [2023-11-24 21:37:50,176 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -15 predicate places. [2023-11-24 21:37:50,177 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 162 transitions, 334 flow [2023-11-24 21:37:50,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:50,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:50,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:37:50,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:37:50,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:50,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash 684761423, now seen corresponding path program 1 times [2023-11-24 21:37:50,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:50,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346499103] [2023-11-24 21:37:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:50,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:50,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346499103] [2023-11-24 21:37:50,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346499103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:50,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:50,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:37:50,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410494013] [2023-11-24 21:37:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:37:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:37:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:50,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 185 [2023-11-24 21:37:50,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 162 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:50,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:50,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 185 [2023-11-24 21:37:50,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:51,382 INFO L124 PetriNetUnfolderBase]: 1797/4859 cut-off events. [2023-11-24 21:37:51,382 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 21:37:51,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7748 conditions, 4859 events. 1797/4859 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 39237 event pairs, 1436 based on Foata normal form. 2/3590 useless extension candidates. Maximal degree in co-relation 7733. Up to 2852 conditions per place. [2023-11-24 21:37:51,417 INFO L140 encePairwiseOnDemand]: 180/185 looper letters, 59 selfloop transitions, 3 changer transitions 0/160 dead transitions. [2023-11-24 21:37:51,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 160 transitions, 454 flow [2023-11-24 21:37:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:37:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 504 transitions. [2023-11-24 21:37:51,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810810810810811 [2023-11-24 21:37:51,420 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 504 transitions. [2023-11-24 21:37:51,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 504 transitions. [2023-11-24 21:37:51,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:51,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 504 transitions. [2023-11-24 21:37:51,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:51,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:51,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:51,426 INFO L175 Difference]: Start difference. First operand has 160 places, 162 transitions, 334 flow. Second operand 4 states and 504 transitions. [2023-11-24 21:37:51,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 160 transitions, 454 flow [2023-11-24 21:37:51,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 160 transitions, 448 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:37:51,431 INFO L231 Difference]: Finished difference. Result has 158 places, 160 transitions, 330 flow [2023-11-24 21:37:51,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=158, PETRI_TRANSITIONS=160} [2023-11-24 21:37:51,432 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -17 predicate places. [2023-11-24 21:37:51,433 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 160 transitions, 330 flow [2023-11-24 21:37:51,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:51,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:51,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:51,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:37:51,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:51,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash 588076993, now seen corresponding path program 1 times [2023-11-24 21:37:51,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569028433] [2023-11-24 21:37:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:51,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:51,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569028433] [2023-11-24 21:37:51,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569028433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:51,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:51,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:37:51,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138521417] [2023-11-24 21:37:51,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:51,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:51,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:51,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:51,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 185 [2023-11-24 21:37:51,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 160 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:51,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:51,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 185 [2023-11-24 21:37:51,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:52,732 INFO L124 PetriNetUnfolderBase]: 2901/7293 cut-off events. [2023-11-24 21:37:52,732 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 21:37:52,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11779 conditions, 7293 events. 2901/7293 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 61566 event pairs, 2366 based on Foata normal form. 0/5461 useless extension candidates. Maximal degree in co-relation 11764. Up to 4449 conditions per place. [2023-11-24 21:37:52,785 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 62 selfloop transitions, 2 changer transitions 0/158 dead transitions. [2023-11-24 21:37:52,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 158 transitions, 454 flow [2023-11-24 21:37:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:37:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-24 21:37:52,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7027027027027027 [2023-11-24 21:37:52,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-24 21:37:52,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-24 21:37:52,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:52,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-24 21:37:52,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:52,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:52,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:52,794 INFO L175 Difference]: Start difference. First operand has 158 places, 160 transitions, 330 flow. Second operand 3 states and 390 transitions. [2023-11-24 21:37:52,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 158 transitions, 454 flow [2023-11-24 21:37:52,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 158 transitions, 448 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:37:52,799 INFO L231 Difference]: Finished difference. Result has 155 places, 158 transitions, 324 flow [2023-11-24 21:37:52,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=155, PETRI_TRANSITIONS=158} [2023-11-24 21:37:52,800 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -20 predicate places. [2023-11-24 21:37:52,801 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 158 transitions, 324 flow [2023-11-24 21:37:52,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:52,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:52,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:52,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:37:52,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:52,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:52,803 INFO L85 PathProgramCache]: Analyzing trace with hash 588076994, now seen corresponding path program 1 times [2023-11-24 21:37:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:52,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208025011] [2023-11-24 21:37:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:52,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208025011] [2023-11-24 21:37:52,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208025011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:52,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:52,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:37:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394857434] [2023-11-24 21:37:52,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:52,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:53,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 185 [2023-11-24 21:37:53,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 158 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:53,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:53,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 185 [2023-11-24 21:37:53,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:53,690 INFO L124 PetriNetUnfolderBase]: 1797/4847 cut-off events. [2023-11-24 21:37:53,690 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:37:53,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7735 conditions, 4847 events. 1797/4847 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 39082 event pairs, 1436 based on Foata normal form. 488/4076 useless extension candidates. Maximal degree in co-relation 7725. Up to 2852 conditions per place. [2023-11-24 21:37:53,725 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 60 selfloop transitions, 2 changer transitions 0/156 dead transitions. [2023-11-24 21:37:53,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 156 transitions, 444 flow [2023-11-24 21:37:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:37:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-11-24 21:37:53,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7099099099099099 [2023-11-24 21:37:53,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-11-24 21:37:53,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-11-24 21:37:53,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:53,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-11-24 21:37:53,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:53,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:53,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:53,734 INFO L175 Difference]: Start difference. First operand has 155 places, 158 transitions, 324 flow. Second operand 3 states and 394 transitions. [2023-11-24 21:37:53,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 156 transitions, 444 flow [2023-11-24 21:37:53,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 156 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:37:53,739 INFO L231 Difference]: Finished difference. Result has 153 places, 156 transitions, 320 flow [2023-11-24 21:37:53,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=153, PETRI_TRANSITIONS=156} [2023-11-24 21:37:53,743 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -22 predicate places. [2023-11-24 21:37:53,743 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 156 transitions, 320 flow [2023-11-24 21:37:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:53,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:53,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:53,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:37:53,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:53,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:53,747 INFO L85 PathProgramCache]: Analyzing trace with hash 231025848, now seen corresponding path program 1 times [2023-11-24 21:37:53,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:53,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583879032] [2023-11-24 21:37:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:53,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:53,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583879032] [2023-11-24 21:37:53,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583879032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:53,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:53,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:37:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159410731] [2023-11-24 21:37:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:53,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:53,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:53,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:54,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 185 [2023-11-24 21:37:54,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 156 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:54,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:54,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 185 [2023-11-24 21:37:54,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:54,562 INFO L124 PetriNetUnfolderBase]: 1797/4829 cut-off events. [2023-11-24 21:37:54,562 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:37:54,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7717 conditions, 4829 events. 1797/4829 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 38827 event pairs, 1436 based on Foata normal form. 46/3634 useless extension candidates. Maximal degree in co-relation 7707. Up to 2852 conditions per place. [2023-11-24 21:37:54,596 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 60 selfloop transitions, 2 changer transitions 0/154 dead transitions. [2023-11-24 21:37:54,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 154 transitions, 440 flow [2023-11-24 21:37:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:37:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-11-24 21:37:54,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7099099099099099 [2023-11-24 21:37:54,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-11-24 21:37:54,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-11-24 21:37:54,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:54,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-11-24 21:37:54,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:54,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:54,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:54,603 INFO L175 Difference]: Start difference. First operand has 153 places, 156 transitions, 320 flow. Second operand 3 states and 394 transitions. [2023-11-24 21:37:54,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 154 transitions, 440 flow [2023-11-24 21:37:54,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 154 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:37:54,608 INFO L231 Difference]: Finished difference. Result has 151 places, 154 transitions, 316 flow [2023-11-24 21:37:54,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=151, PETRI_TRANSITIONS=154} [2023-11-24 21:37:54,609 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -24 predicate places. [2023-11-24 21:37:54,609 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 154 transitions, 316 flow [2023-11-24 21:37:54,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:54,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:54,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:54,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:37:54,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:54,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:54,611 INFO L85 PathProgramCache]: Analyzing trace with hash 231025847, now seen corresponding path program 1 times [2023-11-24 21:37:54,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:54,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442615837] [2023-11-24 21:37:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:54,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:54,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:54,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442615837] [2023-11-24 21:37:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442615837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:54,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:37:54,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082779032] [2023-11-24 21:37:54,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:54,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:54,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:54,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:54,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:54,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 185 [2023-11-24 21:37:54,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 154 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:54,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:54,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 185 [2023-11-24 21:37:54,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:55,519 INFO L124 PetriNetUnfolderBase]: 1849/4945 cut-off events. [2023-11-24 21:37:55,519 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-24 21:37:55,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7931 conditions, 4945 events. 1849/4945 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 39662 event pairs, 1480 based on Foata normal form. 0/3690 useless extension candidates. Maximal degree in co-relation 7921. Up to 2950 conditions per place. [2023-11-24 21:37:55,562 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 62 selfloop transitions, 2 changer transitions 0/152 dead transitions. [2023-11-24 21:37:55,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 152 transitions, 440 flow [2023-11-24 21:37:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:37:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-24 21:37:55,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7027027027027027 [2023-11-24 21:37:55,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-24 21:37:55,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-24 21:37:55,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:55,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-24 21:37:55,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:55,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:55,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:55,571 INFO L175 Difference]: Start difference. First operand has 151 places, 154 transitions, 316 flow. Second operand 3 states and 390 transitions. [2023-11-24 21:37:55,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 152 transitions, 440 flow [2023-11-24 21:37:55,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 152 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:37:55,576 INFO L231 Difference]: Finished difference. Result has 149 places, 152 transitions, 312 flow [2023-11-24 21:37:55,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=149, PETRI_TRANSITIONS=152} [2023-11-24 21:37:55,581 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -26 predicate places. [2023-11-24 21:37:55,581 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 152 transitions, 312 flow [2023-11-24 21:37:55,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:55,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:55,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:55,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:37:55,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:55,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:55,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1317428719, now seen corresponding path program 1 times [2023-11-24 21:37:55,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:55,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606814845] [2023-11-24 21:37:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:55,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606814845] [2023-11-24 21:37:55,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606814845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:55,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:55,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:37:55,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055377835] [2023-11-24 21:37:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:37:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:37:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:37:56,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 185 [2023-11-24 21:37:56,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 152 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:56,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 185 [2023-11-24 21:37:56,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:56,796 INFO L124 PetriNetUnfolderBase]: 2134/4730 cut-off events. [2023-11-24 21:37:56,796 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:37:56,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8177 conditions, 4730 events. 2134/4730 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 33800 event pairs, 755 based on Foata normal form. 0/4157 useless extension candidates. Maximal degree in co-relation 8167. Up to 1928 conditions per place. [2023-11-24 21:37:56,827 INFO L140 encePairwiseOnDemand]: 162/185 looper letters, 83 selfloop transitions, 7 changer transitions 0/156 dead transitions. [2023-11-24 21:37:56,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 156 transitions, 501 flow [2023-11-24 21:37:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:37:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:37:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-11-24 21:37:56,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740540540540541 [2023-11-24 21:37:56,831 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-11-24 21:37:56,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-11-24 21:37:56,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:56,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-11-24 21:37:56,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,837 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,837 INFO L175 Difference]: Start difference. First operand has 149 places, 152 transitions, 312 flow. Second operand 5 states and 531 transitions. [2023-11-24 21:37:56,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 156 transitions, 501 flow [2023-11-24 21:37:56,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 156 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:37:56,842 INFO L231 Difference]: Finished difference. Result has 135 places, 136 transitions, 290 flow [2023-11-24 21:37:56,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=135, PETRI_TRANSITIONS=136} [2023-11-24 21:37:56,843 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -40 predicate places. [2023-11-24 21:37:56,843 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 136 transitions, 290 flow [2023-11-24 21:37:56,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:56,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:56,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:56,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:37:56,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:56,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:56,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1317428718, now seen corresponding path program 1 times [2023-11-24 21:37:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:56,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563584121] [2023-11-24 21:37:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:56,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:57,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:57,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563584121] [2023-11-24 21:37:57,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563584121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:57,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:57,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:37:57,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537186406] [2023-11-24 21:37:57,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:57,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:37:57,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:37:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:37:57,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 185 [2023-11-24 21:37:57,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 136 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 103.66666666666667) internal successors, (622), 6 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:57,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:57,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 185 [2023-11-24 21:37:57,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:37:58,115 INFO L124 PetriNetUnfolderBase]: 1798/4046 cut-off events. [2023-11-24 21:37:58,115 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-24 21:37:58,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7082 conditions, 4046 events. 1798/4046 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 28246 event pairs, 743 based on Foata normal form. 216/3715 useless extension candidates. Maximal degree in co-relation 2813. Up to 1479 conditions per place. [2023-11-24 21:37:58,149 INFO L140 encePairwiseOnDemand]: 168/185 looper letters, 75 selfloop transitions, 7 changer transitions 0/146 dead transitions. [2023-11-24 21:37:58,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 146 transitions, 475 flow [2023-11-24 21:37:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:37:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:37:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 602 transitions. [2023-11-24 21:37:58,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6508108108108108 [2023-11-24 21:37:58,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 602 transitions. [2023-11-24 21:37:58,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 602 transitions. [2023-11-24 21:37:58,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:37:58,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 602 transitions. [2023-11-24 21:37:58,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:58,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:58,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:58,161 INFO L175 Difference]: Start difference. First operand has 135 places, 136 transitions, 290 flow. Second operand 5 states and 602 transitions. [2023-11-24 21:37:58,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 146 transitions, 475 flow [2023-11-24 21:37:58,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 146 transitions, 461 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:37:58,168 INFO L231 Difference]: Finished difference. Result has 125 places, 126 transitions, 270 flow [2023-11-24 21:37:58,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=125, PETRI_TRANSITIONS=126} [2023-11-24 21:37:58,169 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -50 predicate places. [2023-11-24 21:37:58,170 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 126 transitions, 270 flow [2023-11-24 21:37:58,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.66666666666667) internal successors, (622), 6 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:58,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:37:58,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:58,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:37:58,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:37:58,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2109383483, now seen corresponding path program 1 times [2023-11-24 21:37:58,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:58,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550274665] [2023-11-24 21:37:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:58,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:37:58,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:58,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550274665] [2023-11-24 21:37:58,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550274665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:58,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:58,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:37:58,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106567031] [2023-11-24 21:37:58,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:58,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:37:58,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:37:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:37:59,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 185 [2023-11-24 21:37:59,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 126 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:37:59,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:37:59,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 185 [2023-11-24 21:37:59,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:00,326 INFO L124 PetriNetUnfolderBase]: 2502/5551 cut-off events. [2023-11-24 21:38:00,326 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-24 21:38:00,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9711 conditions, 5551 events. 2502/5551 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 40873 event pairs, 536 based on Foata normal form. 0/4555 useless extension candidates. Maximal degree in co-relation 3905. Up to 3437 conditions per place. [2023-11-24 21:38:00,363 INFO L140 encePairwiseOnDemand]: 175/185 looper letters, 125 selfloop transitions, 12 changer transitions 0/193 dead transitions. [2023-11-24 21:38:00,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 193 transitions, 683 flow [2023-11-24 21:38:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:38:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:38:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 891 transitions. [2023-11-24 21:38:00,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.602027027027027 [2023-11-24 21:38:00,367 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 891 transitions. [2023-11-24 21:38:00,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 891 transitions. [2023-11-24 21:38:00,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:00,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 891 transitions. [2023-11-24 21:38:00,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.375) internal successors, (891), 8 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:00,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:00,376 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:00,376 INFO L175 Difference]: Start difference. First operand has 125 places, 126 transitions, 270 flow. Second operand 8 states and 891 transitions. [2023-11-24 21:38:00,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 193 transitions, 683 flow [2023-11-24 21:38:00,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 193 transitions, 667 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:38:00,382 INFO L231 Difference]: Finished difference. Result has 132 places, 136 transitions, 332 flow [2023-11-24 21:38:00,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=332, PETRI_PLACES=132, PETRI_TRANSITIONS=136} [2023-11-24 21:38:00,384 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -43 predicate places. [2023-11-24 21:38:00,384 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 136 transitions, 332 flow [2023-11-24 21:38:00,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:00,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:00,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:00,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:38:00,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:00,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 966379410, now seen corresponding path program 1 times [2023-11-24 21:38:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:00,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557050725] [2023-11-24 21:38:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:00,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:00,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:00,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557050725] [2023-11-24 21:38:00,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557050725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:00,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:00,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:00,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090955753] [2023-11-24 21:38:00,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:00,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:00,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:00,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:01,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 185 [2023-11-24 21:38:01,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 136 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:01,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:01,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 185 [2023-11-24 21:38:01,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:01,793 INFO L124 PetriNetUnfolderBase]: 2058/4754 cut-off events. [2023-11-24 21:38:01,794 INFO L125 PetriNetUnfolderBase]: For 241/241 co-relation queries the response was YES. [2023-11-24 21:38:01,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8495 conditions, 4754 events. 2058/4754 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 35123 event pairs, 889 based on Foata normal form. 0/3941 useless extension candidates. Maximal degree in co-relation 8204. Up to 1703 conditions per place. [2023-11-24 21:38:01,828 INFO L140 encePairwiseOnDemand]: 174/185 looper letters, 82 selfloop transitions, 8 changer transitions 0/152 dead transitions. [2023-11-24 21:38:01,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 152 transitions, 547 flow [2023-11-24 21:38:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:38:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 674 transitions. [2023-11-24 21:38:01,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6072072072072072 [2023-11-24 21:38:01,832 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 674 transitions. [2023-11-24 21:38:01,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 674 transitions. [2023-11-24 21:38:01,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:01,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 674 transitions. [2023-11-24 21:38:01,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:01,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:01,838 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:01,839 INFO L175 Difference]: Start difference. First operand has 132 places, 136 transitions, 332 flow. Second operand 6 states and 674 transitions. [2023-11-24 21:38:01,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 152 transitions, 547 flow [2023-11-24 21:38:01,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 152 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:01,844 INFO L231 Difference]: Finished difference. Result has 131 places, 132 transitions, 336 flow [2023-11-24 21:38:01,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=131, PETRI_TRANSITIONS=132} [2023-11-24 21:38:01,845 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -44 predicate places. [2023-11-24 21:38:01,845 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 132 transitions, 336 flow [2023-11-24 21:38:01,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:01,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:01,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:01,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:38:01,846 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:01,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1997287935, now seen corresponding path program 1 times [2023-11-24 21:38:01,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:01,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950416624] [2023-11-24 21:38:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:01,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:01,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:01,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950416624] [2023-11-24 21:38:01,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950416624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:01,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:01,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:01,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718535179] [2023-11-24 21:38:01,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:01,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:01,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:01,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:02,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 185 [2023-11-24 21:38:02,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 132 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 98.33333333333333) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:02,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:02,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 185 [2023-11-24 21:38:02,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:03,014 INFO L124 PetriNetUnfolderBase]: 2430/5048 cut-off events. [2023-11-24 21:38:03,014 INFO L125 PetriNetUnfolderBase]: For 517/517 co-relation queries the response was YES. [2023-11-24 21:38:03,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9605 conditions, 5048 events. 2430/5048 cut-off events. For 517/517 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 34853 event pairs, 907 based on Foata normal form. 87/4680 useless extension candidates. Maximal degree in co-relation 9293. Up to 2023 conditions per place. [2023-11-24 21:38:03,051 INFO L140 encePairwiseOnDemand]: 172/185 looper letters, 109 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2023-11-24 21:38:03,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 163 transitions, 657 flow [2023-11-24 21:38:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:38:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-11-24 21:38:03,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378378378378379 [2023-11-24 21:38:03,055 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-11-24 21:38:03,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-11-24 21:38:03,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:03,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-11-24 21:38:03,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,061 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,061 INFO L175 Difference]: Start difference. First operand has 131 places, 132 transitions, 336 flow. Second operand 5 states and 590 transitions. [2023-11-24 21:38:03,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 163 transitions, 657 flow [2023-11-24 21:38:03,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 163 transitions, 631 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 21:38:03,068 INFO L231 Difference]: Finished difference. Result has 122 places, 124 transitions, 314 flow [2023-11-24 21:38:03,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=122, PETRI_TRANSITIONS=124} [2023-11-24 21:38:03,069 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -53 predicate places. [2023-11-24 21:38:03,069 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 124 transitions, 314 flow [2023-11-24 21:38:03,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.33333333333333) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:03,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:03,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:38:03,071 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:03,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1997287936, now seen corresponding path program 1 times [2023-11-24 21:38:03,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:03,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297401519] [2023-11-24 21:38:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:03,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:03,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:03,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297401519] [2023-11-24 21:38:03,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297401519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:03,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:03,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:03,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719432552] [2023-11-24 21:38:03,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:03,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:03,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:03,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:03,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:03,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 185 [2023-11-24 21:38:03,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 124 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:03,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 185 [2023-11-24 21:38:03,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:03,579 INFO L124 PetriNetUnfolderBase]: 1391/3115 cut-off events. [2023-11-24 21:38:03,580 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2023-11-24 21:38:03,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5604 conditions, 3115 events. 1391/3115 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 18194 event pairs, 707 based on Foata normal form. 57/2824 useless extension candidates. Maximal degree in co-relation 5596. Up to 1252 conditions per place. [2023-11-24 21:38:03,600 INFO L140 encePairwiseOnDemand]: 181/185 looper letters, 84 selfloop transitions, 3 changer transitions 0/138 dead transitions. [2023-11-24 21:38:03,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 138 transitions, 492 flow [2023-11-24 21:38:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-11-24 21:38:03,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7639639639639639 [2023-11-24 21:38:03,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-11-24 21:38:03,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-11-24 21:38:03,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:03,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-11-24 21:38:03,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,607 INFO L175 Difference]: Start difference. First operand has 122 places, 124 transitions, 314 flow. Second operand 3 states and 424 transitions. [2023-11-24 21:38:03,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 138 transitions, 492 flow [2023-11-24 21:38:03,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 457 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-11-24 21:38:03,613 INFO L231 Difference]: Finished difference. Result has 112 places, 114 transitions, 245 flow [2023-11-24 21:38:03,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2023-11-24 21:38:03,614 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -63 predicate places. [2023-11-24 21:38:03,614 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 245 flow [2023-11-24 21:38:03,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:03,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:03,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:38:03,615 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:03,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1448703574, now seen corresponding path program 1 times [2023-11-24 21:38:03,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:03,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187469874] [2023-11-24 21:38:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:03,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:03,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:03,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187469874] [2023-11-24 21:38:03,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187469874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:03,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:03,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:03,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064919320] [2023-11-24 21:38:03,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:03,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:03,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:03,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:03,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 185 [2023-11-24 21:38:03,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:03,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:03,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 185 [2023-11-24 21:38:03,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:04,669 INFO L124 PetriNetUnfolderBase]: 2290/4731 cut-off events. [2023-11-24 21:38:04,669 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-11-24 21:38:04,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8516 conditions, 4731 events. 2290/4731 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 28754 event pairs, 1839 based on Foata normal form. 73/4396 useless extension candidates. Maximal degree in co-relation 8511. Up to 3558 conditions per place. [2023-11-24 21:38:04,690 INFO L140 encePairwiseOnDemand]: 180/185 looper letters, 64 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-24 21:38:04,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 371 flow [2023-11-24 21:38:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-11-24 21:38:04,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6954954954954955 [2023-11-24 21:38:04,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-11-24 21:38:04,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-11-24 21:38:04,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:04,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-11-24 21:38:04,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:04,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:04,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:04,699 INFO L175 Difference]: Start difference. First operand has 112 places, 114 transitions, 245 flow. Second operand 3 states and 386 transitions. [2023-11-24 21:38:04,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 371 flow [2023-11-24 21:38:04,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 111 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:04,703 INFO L231 Difference]: Finished difference. Result has 110 places, 111 transitions, 240 flow [2023-11-24 21:38:04,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=110, PETRI_TRANSITIONS=111} [2023-11-24 21:38:04,704 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -65 predicate places. [2023-11-24 21:38:04,704 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 240 flow [2023-11-24 21:38:04,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:04,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:04,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:04,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:38:04,705 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:04,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1448703573, now seen corresponding path program 1 times [2023-11-24 21:38:04,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:04,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961636736] [2023-11-24 21:38:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:04,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:05,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:05,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961636736] [2023-11-24 21:38:05,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961636736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:05,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:05,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:38:05,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96224102] [2023-11-24 21:38:05,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:05,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:38:05,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:38:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:38:05,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 185 [2023-11-24 21:38:05,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 240 flow. Second operand has 9 states, 9 states have (on average 106.11111111111111) internal successors, (955), 9 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:05,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:05,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 185 [2023-11-24 21:38:05,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:06,464 INFO L124 PetriNetUnfolderBase]: 1652/3462 cut-off events. [2023-11-24 21:38:06,464 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-24 21:38:06,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6325 conditions, 3462 events. 1652/3462 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 19414 event pairs, 406 based on Foata normal form. 0/3186 useless extension candidates. Maximal degree in co-relation 6320. Up to 2374 conditions per place. [2023-11-24 21:38:06,484 INFO L140 encePairwiseOnDemand]: 175/185 looper letters, 100 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2023-11-24 21:38:06,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 149 transitions, 539 flow [2023-11-24 21:38:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:38:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:38:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1045 transitions. [2023-11-24 21:38:06,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276276276276276 [2023-11-24 21:38:06,490 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1045 transitions. [2023-11-24 21:38:06,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1045 transitions. [2023-11-24 21:38:06,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:06,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1045 transitions. [2023-11-24 21:38:06,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.11111111111111) internal successors, (1045), 9 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:06,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:06,499 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:06,500 INFO L175 Difference]: Start difference. First operand has 110 places, 111 transitions, 240 flow. Second operand 9 states and 1045 transitions. [2023-11-24 21:38:06,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 149 transitions, 539 flow [2023-11-24 21:38:06,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 149 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:06,505 INFO L231 Difference]: Finished difference. Result has 115 places, 109 transitions, 250 flow [2023-11-24 21:38:06,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=115, PETRI_TRANSITIONS=109} [2023-11-24 21:38:06,506 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -60 predicate places. [2023-11-24 21:38:06,507 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 109 transitions, 250 flow [2023-11-24 21:38:06,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 106.11111111111111) internal successors, (955), 9 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:06,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:06,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:06,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:38:06,509 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:06,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1926805702, now seen corresponding path program 1 times [2023-11-24 21:38:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404742850] [2023-11-24 21:38:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:06,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:06,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404742850] [2023-11-24 21:38:06,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404742850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:06,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:06,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:38:06,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239587066] [2023-11-24 21:38:06,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:06,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:06,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:06,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:06,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 185 [2023-11-24 21:38:06,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 109 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 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) [2023-11-24 21:38:06,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:06,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 185 [2023-11-24 21:38:06,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:07,324 INFO L124 PetriNetUnfolderBase]: 1380/3071 cut-off events. [2023-11-24 21:38:07,324 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-24 21:38:07,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5525 conditions, 3071 events. 1380/3071 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 17695 event pairs, 1089 based on Foata normal form. 0/2782 useless extension candidates. Maximal degree in co-relation 5520. Up to 2235 conditions per place. [2023-11-24 21:38:07,338 INFO L140 encePairwiseOnDemand]: 183/185 looper letters, 61 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-11-24 21:38:07,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 108 transitions, 372 flow [2023-11-24 21:38:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-11-24 21:38:07,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2023-11-24 21:38:07,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-11-24 21:38:07,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-11-24 21:38:07,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:07,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-11-24 21:38:07,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:07,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:07,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:07,347 INFO L175 Difference]: Start difference. First operand has 115 places, 109 transitions, 250 flow. Second operand 3 states and 395 transitions. [2023-11-24 21:38:07,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 108 transitions, 372 flow [2023-11-24 21:38:07,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 108 transitions, 354 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-24 21:38:07,352 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 232 flow [2023-11-24 21:38:07,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2023-11-24 21:38:07,353 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -67 predicate places. [2023-11-24 21:38:07,353 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 232 flow [2023-11-24 21:38:07,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 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) [2023-11-24 21:38:07,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:07,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:07,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:38:07,354 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:07,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:07,355 INFO L85 PathProgramCache]: Analyzing trace with hash 398566288, now seen corresponding path program 1 times [2023-11-24 21:38:07,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:07,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537812485] [2023-11-24 21:38:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:07,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:07,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:07,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537812485] [2023-11-24 21:38:07,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537812485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:07,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:07,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:07,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886174045] [2023-11-24 21:38:07,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:07,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:07,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 185 [2023-11-24 21:38:07,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 107.5) internal successors, (645), 6 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:07,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:07,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 185 [2023-11-24 21:38:07,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:08,347 INFO L124 PetriNetUnfolderBase]: 1397/3064 cut-off events. [2023-11-24 21:38:08,348 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-24 21:38:08,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5485 conditions, 3064 events. 1397/3064 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 17503 event pairs, 1074 based on Foata normal form. 0/2811 useless extension candidates. Maximal degree in co-relation 5480. Up to 2203 conditions per place. [2023-11-24 21:38:08,359 INFO L140 encePairwiseOnDemand]: 178/185 looper letters, 68 selfloop transitions, 5 changer transitions 0/114 dead transitions. [2023-11-24 21:38:08,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 391 flow [2023-11-24 21:38:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:38:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-11-24 21:38:08,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421621621621622 [2023-11-24 21:38:08,362 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-11-24 21:38:08,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-11-24 21:38:08,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:08,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-11-24 21:38:08,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:08,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:08,368 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:08,368 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 232 flow. Second operand 5 states and 594 transitions. [2023-11-24 21:38:08,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 391 flow [2023-11-24 21:38:08,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 114 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:08,372 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 237 flow [2023-11-24 21:38:08,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2023-11-24 21:38:08,373 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -66 predicate places. [2023-11-24 21:38:08,373 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 237 flow [2023-11-24 21:38:08,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 107.5) internal successors, (645), 6 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:08,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:08,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:08,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:38:08,374 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:08,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash 398566289, now seen corresponding path program 1 times [2023-11-24 21:38:08,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:08,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514200135] [2023-11-24 21:38:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:08,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514200135] [2023-11-24 21:38:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514200135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:08,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:08,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:08,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556341006] [2023-11-24 21:38:08,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:08,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:08,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:08,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:09,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 185 [2023-11-24 21:38:09,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 113.16666666666667) internal successors, (679), 6 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:09,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:09,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 185 [2023-11-24 21:38:09,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:09,542 INFO L124 PetriNetUnfolderBase]: 1380/3023 cut-off events. [2023-11-24 21:38:09,543 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-24 21:38:09,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5440 conditions, 3023 events. 1380/3023 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 17184 event pairs, 1074 based on Foata normal form. 24/2794 useless extension candidates. Maximal degree in co-relation 5435. Up to 2204 conditions per place. [2023-11-24 21:38:09,559 INFO L140 encePairwiseOnDemand]: 178/185 looper letters, 65 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2023-11-24 21:38:09,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 390 flow [2023-11-24 21:38:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:38:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 731 transitions. [2023-11-24 21:38:09,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585585585585586 [2023-11-24 21:38:09,563 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 731 transitions. [2023-11-24 21:38:09,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 731 transitions. [2023-11-24 21:38:09,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:09,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 731 transitions. [2023-11-24 21:38:09,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.83333333333333) internal successors, (731), 6 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:09,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:09,569 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:09,570 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 237 flow. Second operand 6 states and 731 transitions. [2023-11-24 21:38:09,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 390 flow [2023-11-24 21:38:09,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 112 transitions, 380 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:38:09,574 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 233 flow [2023-11-24 21:38:09,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2023-11-24 21:38:09,574 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -67 predicate places. [2023-11-24 21:38:09,575 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 233 flow [2023-11-24 21:38:09,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.16666666666667) internal successors, (679), 6 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:09,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:09,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:38:09,576 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:09,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:09,576 INFO L85 PathProgramCache]: Analyzing trace with hash -529378818, now seen corresponding path program 1 times [2023-11-24 21:38:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695023088] [2023-11-24 21:38:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:09,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:09,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:09,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695023088] [2023-11-24 21:38:09,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695023088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:09,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:09,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:09,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412536070] [2023-11-24 21:38:09,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:09,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:09,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:09,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:09,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:09,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 185 [2023-11-24 21:38:09,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:09,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:09,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 185 [2023-11-24 21:38:09,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:10,030 INFO L124 PetriNetUnfolderBase]: 1368/3011 cut-off events. [2023-11-24 21:38:10,030 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-24 21:38:10,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 3011 events. 1368/3011 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 17201 event pairs, 1074 based on Foata normal form. 0/2770 useless extension candidates. Maximal degree in co-relation 5410. Up to 2195 conditions per place. [2023-11-24 21:38:10,075 INFO L140 encePairwiseOnDemand]: 182/185 looper letters, 67 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-24 21:38:10,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 111 transitions, 386 flow [2023-11-24 21:38:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-11-24 21:38:10,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2023-11-24 21:38:10,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-11-24 21:38:10,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-11-24 21:38:10,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:10,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-11-24 21:38:10,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:10,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:10,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:10,083 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 233 flow. Second operand 3 states and 405 transitions. [2023-11-24 21:38:10,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 111 transitions, 386 flow [2023-11-24 21:38:10,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 376 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 21:38:10,086 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 225 flow [2023-11-24 21:38:10,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2023-11-24 21:38:10,091 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -70 predicate places. [2023-11-24 21:38:10,091 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 225 flow [2023-11-24 21:38:10,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:10,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:10,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:10,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:38:10,092 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:10,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash -453167144, now seen corresponding path program 1 times [2023-11-24 21:38:10,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:10,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497212110] [2023-11-24 21:38:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:10,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:11,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:11,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497212110] [2023-11-24 21:38:11,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497212110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:11,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:11,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-24 21:38:11,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417615606] [2023-11-24 21:38:11,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:11,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:38:11,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:38:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:38:13,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 185 [2023-11-24 21:38:13,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 225 flow. Second operand has 14 states, 14 states have (on average 105.71428571428571) internal successors, (1480), 14 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:13,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:13,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 185 [2023-11-24 21:38:13,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:14,083 INFO L124 PetriNetUnfolderBase]: 1634/3317 cut-off events. [2023-11-24 21:38:14,084 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-24 21:38:14,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 3317 events. 1634/3317 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 18360 event pairs, 434 based on Foata normal form. 0/3127 useless extension candidates. Maximal degree in co-relation 6158. Up to 1940 conditions per place. [2023-11-24 21:38:14,103 INFO L140 encePairwiseOnDemand]: 171/185 looper letters, 128 selfloop transitions, 13 changer transitions 0/173 dead transitions. [2023-11-24 21:38:14,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 173 transitions, 657 flow [2023-11-24 21:38:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:38:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:38:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1389 transitions. [2023-11-24 21:38:14,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256756756756757 [2023-11-24 21:38:14,109 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1389 transitions. [2023-11-24 21:38:14,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1389 transitions. [2023-11-24 21:38:14,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:14,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1389 transitions. [2023-11-24 21:38:14,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.75) internal successors, (1389), 12 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:14,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:14,121 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:14,122 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 225 flow. Second operand 12 states and 1389 transitions. [2023-11-24 21:38:14,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 173 transitions, 657 flow [2023-11-24 21:38:14,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 173 transitions, 653 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:14,127 INFO L231 Difference]: Finished difference. Result has 111 places, 100 transitions, 247 flow [2023-11-24 21:38:14,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=111, PETRI_TRANSITIONS=100} [2023-11-24 21:38:14,128 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -64 predicate places. [2023-11-24 21:38:14,128 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 100 transitions, 247 flow [2023-11-24 21:38:14,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 105.71428571428571) internal successors, (1480), 14 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:14,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:14,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:14,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:38:14,129 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:14,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash 111509212, now seen corresponding path program 1 times [2023-11-24 21:38:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:14,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095631059] [2023-11-24 21:38:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:14,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095631059] [2023-11-24 21:38:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095631059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:15,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:15,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:38:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402004178] [2023-11-24 21:38:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:38:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:38:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:38:17,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 185 [2023-11-24 21:38:17,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 100 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 89.23076923076923) internal successors, (1160), 13 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:17,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:17,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 185 [2023-11-24 21:38:17,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:18,456 INFO L124 PetriNetUnfolderBase]: 1689/3412 cut-off events. [2023-11-24 21:38:18,456 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-24 21:38:18,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 3412 events. 1689/3412 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 19037 event pairs, 466 based on Foata normal form. 12/3226 useless extension candidates. Maximal degree in co-relation 6513. Up to 2056 conditions per place. [2023-11-24 21:38:18,478 INFO L140 encePairwiseOnDemand]: 170/185 looper letters, 127 selfloop transitions, 14 changer transitions 0/173 dead transitions. [2023-11-24 21:38:18,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 685 flow [2023-11-24 21:38:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:38:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:38:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1185 transitions. [2023-11-24 21:38:18,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337837837837838 [2023-11-24 21:38:18,484 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1185 transitions. [2023-11-24 21:38:18,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1185 transitions. [2023-11-24 21:38:18,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:18,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1185 transitions. [2023-11-24 21:38:18,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 98.75) internal successors, (1185), 12 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:18,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:18,494 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:18,495 INFO L175 Difference]: Start difference. First operand has 111 places, 100 transitions, 247 flow. Second operand 12 states and 1185 transitions. [2023-11-24 21:38:18,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 685 flow [2023-11-24 21:38:18,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 173 transitions, 663 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-24 21:38:18,500 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 273 flow [2023-11-24 21:38:18,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=273, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2023-11-24 21:38:18,501 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -60 predicate places. [2023-11-24 21:38:18,501 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 273 flow [2023-11-24 21:38:18,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 89.23076923076923) internal successors, (1160), 13 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:18,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:18,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:18,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 21:38:18,502 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:18,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1281849037, now seen corresponding path program 1 times [2023-11-24 21:38:18,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:18,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892556766] [2023-11-24 21:38:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:20,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892556766] [2023-11-24 21:38:20,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892556766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:20,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:20,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-24 21:38:20,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99829153] [2023-11-24 21:38:20,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:20,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:38:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:38:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:38:21,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 185 [2023-11-24 21:38:21,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 273 flow. Second operand has 15 states, 15 states have (on average 106.33333333333333) internal successors, (1595), 15 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:21,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:21,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 185 [2023-11-24 21:38:21,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:22,164 INFO L124 PetriNetUnfolderBase]: 1846/3643 cut-off events. [2023-11-24 21:38:22,164 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2023-11-24 21:38:22,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7213 conditions, 3643 events. 1846/3643 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 19944 event pairs, 496 based on Foata normal form. 0/3447 useless extension candidates. Maximal degree in co-relation 7204. Up to 1990 conditions per place. [2023-11-24 21:38:22,180 INFO L140 encePairwiseOnDemand]: 161/185 looper letters, 162 selfloop transitions, 23 changer transitions 0/217 dead transitions. [2023-11-24 21:38:22,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 217 transitions, 890 flow [2023-11-24 21:38:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:38:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-24 21:38:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1745 transitions. [2023-11-24 21:38:22,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6288288288288288 [2023-11-24 21:38:22,187 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1745 transitions. [2023-11-24 21:38:22,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1745 transitions. [2023-11-24 21:38:22,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:22,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1745 transitions. [2023-11-24 21:38:22,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.33333333333333) internal successors, (1745), 15 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:22,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 185.0) internal successors, (2960), 16 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:22,199 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 185.0) internal successors, (2960), 16 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:22,200 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 273 flow. Second operand 15 states and 1745 transitions. [2023-11-24 21:38:22,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 217 transitions, 890 flow [2023-11-24 21:38:22,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 217 transitions, 868 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-24 21:38:22,206 INFO L231 Difference]: Finished difference. Result has 122 places, 108 transitions, 333 flow [2023-11-24 21:38:22,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=333, PETRI_PLACES=122, PETRI_TRANSITIONS=108} [2023-11-24 21:38:22,207 INFO L281 CegarLoopForPetriNet]: 175 programPoint places, -53 predicate places. [2023-11-24 21:38:22,208 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 108 transitions, 333 flow [2023-11-24 21:38:22,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.33333333333333) internal successors, (1595), 15 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:22,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:22,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:22,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 21:38:22,209 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-24 21:38:22,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1081538355, now seen corresponding path program 1 times [2023-11-24 21:38:22,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:22,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817977947] [2023-11-24 21:38:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:22,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:22,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817977947] [2023-11-24 21:38:22,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817977947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:22,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:22,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994571463] [2023-11-24 21:38:22,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:22,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:22,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 185 [2023-11-24 21:38:22,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 108 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:22,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:22,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 185 [2023-11-24 21:38:22,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand