./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/01b_inc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/01b_inc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu --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 a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:36:34,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:36:34,926 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:36:34,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:36:34,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:36:34,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:36:34,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:36:34,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:36:34,975 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:36:34,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:36:34,981 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:36:34,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:36:34,983 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:36:34,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:36:34,985 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:36:34,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:36:34,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:36:34,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:36:34,987 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:36:34,987 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:36:34,988 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:36:34,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:36:34,989 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:36:34,989 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:36:34,990 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:36:34,990 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:36:34,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:36:34,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:36:34,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:36:34,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:34,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:36:34,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:36:34,994 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:36:34,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:36:34,995 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:36:34,995 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:36:34,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:36:34,996 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:36:34,996 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_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 [2023-11-19 07:36:35,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:36:35,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:36:35,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:36:35,338 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:36:35,339 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:36:35,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/01b_inc.i [2023-11-19 07:36:38,477 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:36:38,826 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:36:38,827 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/sv-benchmarks/c/pthread-ext/01b_inc.i [2023-11-19 07:36:38,854 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/data/373a6f93a/e05d04bf38064b33b7a2a3d4dc58f499/FLAG1a12b923b [2023-11-19 07:36:38,870 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/data/373a6f93a/e05d04bf38064b33b7a2a3d4dc58f499 [2023-11-19 07:36:38,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:36:38,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:36:38,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:38,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:36:38,883 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:36:38,884 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a86dc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:38, skipping insertion in model container [2023-11-19 07:36:38,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:38" (1/1) ... [2023-11-19 07:36:38,953 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:36:39,200 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:36:39,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:39,439 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:36:39,465 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 07:36:39,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:39,548 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:36:39,548 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:36:39,548 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:36:39,556 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:36:39,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39 WrapperNode [2023-11-19 07:36:39,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:39,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:39,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:36:39,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:36:39,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,632 INFO L138 Inliner]: procedures = 173, calls = 21, calls flagged for inlining = 8, calls inlined = 9, statements flattened = 64 [2023-11-19 07:36:39,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:39,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:36:39,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:36:39,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:36:39,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,651 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,654 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:36:39,662 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:36:39,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:36:39,662 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:36:39,668 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (1/1) ... [2023-11-19 07:36:39,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:39,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:39,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:36:39,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8a86255-925e-4ba3-9af1-c839de40cbda/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:36:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:36:39,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:36:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:36:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:36:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:36:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:36:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:36:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:36:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:36:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:36:39,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:36:39,762 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:36:39,961 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:36:39,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:36:40,115 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:36:40,267 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:36:40,267 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:36:40,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:40 BoogieIcfgContainer [2023-11-19 07:36:40,270 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:36:40,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:36:40,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:36:40,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:36:40,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:38" (1/3) ... [2023-11-19 07:36:40,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455b197e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:40, skipping insertion in model container [2023-11-19 07:36:40,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:39" (2/3) ... [2023-11-19 07:36:40,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455b197e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:40, skipping insertion in model container [2023-11-19 07:36:40,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:40" (3/3) ... [2023-11-19 07:36:40,291 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-11-19 07:36:40,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:36:40,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 07:36:40,309 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:36:40,355 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:36:40,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 47 transitions, 98 flow [2023-11-19 07:36:40,431 INFO L124 PetriNetUnfolderBase]: 4/63 cut-off events. [2023-11-19 07:36:40,431 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:40,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 63 events. 4/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 126 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 33. Up to 4 conditions per place. [2023-11-19 07:36:40,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 47 transitions, 98 flow [2023-11-19 07:36:40,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 47 transitions, 98 flow [2023-11-19 07:36:40,445 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:36:40,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 47 transitions, 98 flow [2023-11-19 07:36:40,459 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 47 transitions, 98 flow [2023-11-19 07:36:40,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 47 transitions, 98 flow [2023-11-19 07:36:40,477 INFO L124 PetriNetUnfolderBase]: 4/63 cut-off events. [2023-11-19 07:36:40,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:40,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 63 events. 4/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 126 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 33. Up to 4 conditions per place. [2023-11-19 07:36:40,480 INFO L119 LiptonReduction]: Number of co-enabled transitions 570 [2023-11-19 07:36:42,644 INFO L134 LiptonReduction]: Checked pairs total: 515 [2023-11-19 07:36:42,646 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-19 07:36:42,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:42,682 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;@2492e070, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:42,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:36:42,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:42,697 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:36:42,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:42,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:42,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:42,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 07:36:42,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash 9493, now seen corresponding path program 1 times [2023-11-19 07:36:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:42,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570899987] [2023-11-19 07:36:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:42,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:42,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570899987] [2023-11-19 07:36:42,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570899987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:42,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:42,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572880875] [2023-11-19 07:36:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:36:42,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:42,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:36:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:36:42,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 95 [2023-11-19 07:36:42,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 26 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:42,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:42,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 95 [2023-11-19 07:36:42,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:42,965 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2023-11-19 07:36:42,965 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:42,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 20 events. 4/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 38 event pairs, 4 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 26. Up to 19 conditions per place. [2023-11-19 07:36:42,967 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-19 07:36:42,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 8 transitions, 34 flow [2023-11-19 07:36:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:36:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:36:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 86 transitions. [2023-11-19 07:36:42,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2023-11-19 07:36:42,985 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 86 transitions. [2023-11-19 07:36:42,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 86 transitions. [2023-11-19 07:36:42,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:42,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 86 transitions. [2023-11-19 07:36:42,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:42,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:42,999 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,001 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 26 flow. Second operand 2 states and 86 transitions. [2023-11-19 07:36:43,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 8 transitions, 34 flow [2023-11-19 07:36:43,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:43,007 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 20 flow [2023-11-19 07:36:43,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2023-11-19 07:36:43,014 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-11-19 07:36:43,014 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 20 flow [2023-11-19 07:36:43,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:43,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:43,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:36:43,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 07:36:43,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash 9500, now seen corresponding path program 1 times [2023-11-19 07:36:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:43,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657473482] [2023-11-19 07:36:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:43,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:43,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657473482] [2023-11-19 07:36:43,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657473482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:43,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:43,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:43,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128551739] [2023-11-19 07:36:43,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:43,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:43,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 95 [2023-11-19 07:36:43,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:43,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 95 [2023-11-19 07:36:43,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:43,264 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-19 07:36:43,265 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:43,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 16 events. 3/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 3 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 32. Up to 14 conditions per place. [2023-11-19 07:36:43,266 INFO L140 encePairwiseOnDemand]: 93/95 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-11-19 07:36:43,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 7 transitions, 30 flow [2023-11-19 07:36:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2023-11-19 07:36:43,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508771929824561 [2023-11-19 07:36:43,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2023-11-19 07:36:43,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2023-11-19 07:36:43,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:43,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2023-11-19 07:36:43,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,274 INFO L175 Difference]: Start difference. First operand has 12 places, 8 transitions, 20 flow. Second operand 3 states and 100 transitions. [2023-11-19 07:36:43,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 7 transitions, 30 flow [2023-11-19 07:36:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:43,275 INFO L231 Difference]: Finished difference. Result has 13 places, 7 transitions, 20 flow [2023-11-19 07:36:43,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=13, PETRI_TRANSITIONS=7} [2023-11-19 07:36:43,276 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2023-11-19 07:36:43,276 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 7 transitions, 20 flow [2023-11-19 07:36:43,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:43,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:43,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:36:43,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 07:36:43,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash 9501, now seen corresponding path program 1 times [2023-11-19 07:36:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:43,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137945704] [2023-11-19 07:36:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:43,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:43,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:43,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137945704] [2023-11-19 07:36:43,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137945704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:43,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:43,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:43,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310153955] [2023-11-19 07:36:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:43,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:43,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 95 [2023-11-19 07:36:43,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 7 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:43,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 95 [2023-11-19 07:36:43,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:43,422 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-19 07:36:43,422 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:43,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 25. Up to 10 conditions per place. [2023-11-19 07:36:43,423 INFO L140 encePairwiseOnDemand]: 93/95 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-11-19 07:36:43,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 6 transitions, 28 flow [2023-11-19 07:36:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2023-11-19 07:36:43,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2023-11-19 07:36:43,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 105 transitions. [2023-11-19 07:36:43,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 105 transitions. [2023-11-19 07:36:43,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:43,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 105 transitions. [2023-11-19 07:36:43,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,430 INFO L175 Difference]: Start difference. First operand has 13 places, 7 transitions, 20 flow. Second operand 3 states and 105 transitions. [2023-11-19 07:36:43,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 6 transitions, 28 flow [2023-11-19 07:36:43,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:43,431 INFO L231 Difference]: Finished difference. Result has 13 places, 6 transitions, 19 flow [2023-11-19 07:36:43,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=19, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2023-11-19 07:36:43,433 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2023-11-19 07:36:43,433 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 19 flow [2023-11-19 07:36:43,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:43,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:43,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:36:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:36:43,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 07:36:43,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash 189405500, now seen corresponding path program 1 times [2023-11-19 07:36:43,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:43,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140102759] [2023-11-19 07:36:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:43,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:43,455 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:36:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:43,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:36:43,488 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:36:43,489 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 07:36:43,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-19 07:36:43,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-19 07:36:43,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-19 07:36:43,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-19 07:36:43,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-19 07:36:43,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:36:43,494 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:36:43,497 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:36:43,497 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:36:43,518 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:36:43,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 63 transitions, 136 flow [2023-11-19 07:36:43,541 INFO L124 PetriNetUnfolderBase]: 7/97 cut-off events. [2023-11-19 07:36:43,541 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:43,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 97 events. 7/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 225 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2023-11-19 07:36:43,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 63 transitions, 136 flow [2023-11-19 07:36:43,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 63 transitions, 136 flow [2023-11-19 07:36:43,545 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:36:43,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 63 transitions, 136 flow [2023-11-19 07:36:43,546 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 63 transitions, 136 flow [2023-11-19 07:36:43,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 63 transitions, 136 flow [2023-11-19 07:36:43,563 INFO L124 PetriNetUnfolderBase]: 7/97 cut-off events. [2023-11-19 07:36:43,564 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:36:43,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 97 events. 7/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 225 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2023-11-19 07:36:43,567 INFO L119 LiptonReduction]: Number of co-enabled transitions 1620 [2023-11-19 07:36:44,800 INFO L134 LiptonReduction]: Checked pairs total: 5609 [2023-11-19 07:36:44,800 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-11-19 07:36:44,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:44,809 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;@2492e070, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:44,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:36:44,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:44,811 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:36:44,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:44,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:44,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:44,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:36:44,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash 13464, now seen corresponding path program 1 times [2023-11-19 07:36:44,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:44,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277850289] [2023-11-19 07:36:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:44,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:44,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:44,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277850289] [2023-11-19 07:36:44,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277850289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:44,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:44,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:44,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383936019] [2023-11-19 07:36:44,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:44,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:36:44,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:36:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:36:44,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 106 [2023-11-19 07:36:44,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:44,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:44,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 106 [2023-11-19 07:36:44,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:44,966 INFO L124 PetriNetUnfolderBase]: 196/414 cut-off events. [2023-11-19 07:36:44,967 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:36:44,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 414 events. 196/414 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2261 event pairs, 152 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 238. Up to 321 conditions per place. [2023-11-19 07:36:44,979 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 16 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-11-19 07:36:44,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 96 flow [2023-11-19 07:36:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:36:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:36:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 113 transitions. [2023-11-19 07:36:44,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2023-11-19 07:36:44,986 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 113 transitions. [2023-11-19 07:36:44,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 113 transitions. [2023-11-19 07:36:44,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:44,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 113 transitions. [2023-11-19 07:36:44,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 56.5) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:44,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:44,989 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:44,989 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 70 flow. Second operand 2 states and 113 transitions. [2023-11-19 07:36:44,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 96 flow [2023-11-19 07:36:44,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 96 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:44,991 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 64 flow [2023-11-19 07:36:44,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-19 07:36:44,993 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-11-19 07:36:44,993 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 64 flow [2023-11-19 07:36:44,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:44,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:44,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:44,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:36:44,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:36:44,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash 13469, now seen corresponding path program 1 times [2023-11-19 07:36:44,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:44,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168379984] [2023-11-19 07:36:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:45,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:45,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168379984] [2023-11-19 07:36:45,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168379984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:45,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:45,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:45,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508889119] [2023-11-19 07:36:45,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:45,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:45,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:45,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2023-11-19 07:36:45,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:45,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2023-11-19 07:36:45,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:45,134 INFO L124 PetriNetUnfolderBase]: 141/308 cut-off events. [2023-11-19 07:36:45,134 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:36:45,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 308 events. 141/308 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1583 event pairs, 108 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 559. Up to 234 conditions per place. [2023-11-19 07:36:45,138 INFO L140 encePairwiseOnDemand]: 104/106 looper letters, 14 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-19 07:36:45,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 92 flow [2023-11-19 07:36:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-11-19 07:36:45,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276729559748428 [2023-11-19 07:36:45,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-11-19 07:36:45,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-11-19 07:36:45,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:45,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-11-19 07:36:45,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,144 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 64 flow. Second operand 3 states and 136 transitions. [2023-11-19 07:36:45,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 92 flow [2023-11-19 07:36:45,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:45,146 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 64 flow [2023-11-19 07:36:45,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-19 07:36:45,148 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-19 07:36:45,148 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 64 flow [2023-11-19 07:36:45,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:45,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:36:45,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:36:45,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash 13470, now seen corresponding path program 1 times [2023-11-19 07:36:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225181727] [2023-11-19 07:36:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:45,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:45,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225181727] [2023-11-19 07:36:45,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225181727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:45,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:45,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:45,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180606836] [2023-11-19 07:36:45,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:45,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:45,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:45,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:45,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 106 [2023-11-19 07:36:45,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:45,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 106 [2023-11-19 07:36:45,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:45,275 INFO L124 PetriNetUnfolderBase]: 86/202 cut-off events. [2023-11-19 07:36:45,276 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:36:45,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 202 events. 86/202 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 891 event pairs, 64 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 368. Up to 148 conditions per place. [2023-11-19 07:36:45,278 INFO L140 encePairwiseOnDemand]: 104/106 looper letters, 13 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-19 07:36:45,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 90 flow [2023-11-19 07:36:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-19 07:36:45,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2023-11-19 07:36:45,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-19 07:36:45,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-19 07:36:45,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:45,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-19 07:36:45,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,284 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 64 flow. Second operand 3 states and 141 transitions. [2023-11-19 07:36:45,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 90 flow [2023-11-19 07:36:45,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:45,286 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 63 flow [2023-11-19 07:36:45,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-11-19 07:36:45,287 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-19 07:36:45,287 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 63 flow [2023-11-19 07:36:45,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:45,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:45,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:36:45,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:36:45,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1222058208, now seen corresponding path program 1 times [2023-11-19 07:36:45,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:45,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047531714] [2023-11-19 07:36:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:45,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:45,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:45,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047531714] [2023-11-19 07:36:45,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047531714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:45,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:45,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:45,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184573034] [2023-11-19 07:36:45,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:45,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:45,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:45,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:45,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:45,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2023-11-19 07:36:45,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:45,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2023-11-19 07:36:45,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:45,643 INFO L124 PetriNetUnfolderBase]: 200/387 cut-off events. [2023-11-19 07:36:45,643 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:36:45,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 387 events. 200/387 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1940 event pairs, 51 based on Foata normal form. 12/350 useless extension candidates. Maximal degree in co-relation 781. Up to 128 conditions per place. [2023-11-19 07:36:45,647 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 35 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2023-11-19 07:36:45,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 211 flow [2023-11-19 07:36:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:36:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 288 transitions. [2023-11-19 07:36:45,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2023-11-19 07:36:45,650 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 288 transitions. [2023-11-19 07:36:45,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 288 transitions. [2023-11-19 07:36:45,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:45,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 288 transitions. [2023-11-19 07:36:45,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,655 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,655 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 63 flow. Second operand 6 states and 288 transitions. [2023-11-19 07:36:45,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 211 flow [2023-11-19 07:36:45,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:45,657 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 118 flow [2023-11-19 07:36:45,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-11-19 07:36:45,659 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-11-19 07:36:45,659 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 118 flow [2023-11-19 07:36:45,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:45,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:45,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:36:45,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:36:45,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:36:45,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1026914347, now seen corresponding path program 1 times [2023-11-19 07:36:45,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:45,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611325287] [2023-11-19 07:36:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:45,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:45,673 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:36:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:45,686 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:36:45,686 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:36:45,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:36:45,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-19 07:36:45,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:36:45,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:36:45,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-19 07:36:45,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:36:45,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:36:45,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:36:45,688 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 07:36:45,689 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:36:45,689 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:36:45,711 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:36:45,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 176 flow [2023-11-19 07:36:45,729 INFO L124 PetriNetUnfolderBase]: 10/131 cut-off events. [2023-11-19 07:36:45,729 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:36:45,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 10/131 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 340 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 101. Up to 8 conditions per place. [2023-11-19 07:36:45,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 79 transitions, 176 flow [2023-11-19 07:36:45,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 79 transitions, 176 flow [2023-11-19 07:36:45,732 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:36:45,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 79 transitions, 176 flow [2023-11-19 07:36:45,733 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 79 transitions, 176 flow [2023-11-19 07:36:45,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 176 flow [2023-11-19 07:36:45,748 INFO L124 PetriNetUnfolderBase]: 10/131 cut-off events. [2023-11-19 07:36:45,748 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:36:45,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 10/131 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 340 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 101. Up to 8 conditions per place. [2023-11-19 07:36:45,752 INFO L119 LiptonReduction]: Number of co-enabled transitions 3150 [2023-11-19 07:36:47,273 INFO L134 LiptonReduction]: Checked pairs total: 11085 [2023-11-19 07:36:47,273 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-11-19 07:36:47,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:47,282 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;@2492e070, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:47,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 07:36:47,283 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:47,284 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:36:47,284 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:47,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:47,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:47,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:36:47,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:47,286 INFO L85 PathProgramCache]: Analyzing trace with hash 18137, now seen corresponding path program 1 times [2023-11-19 07:36:47,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:47,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308118418] [2023-11-19 07:36:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:47,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:47,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:47,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308118418] [2023-11-19 07:36:47,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308118418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:47,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:47,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:47,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742781677] [2023-11-19 07:36:47,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:47,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:36:47,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:36:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:36:47,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 131 [2023-11-19 07:36:47,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 98 flow. Second operand has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:47,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 131 [2023-11-19 07:36:47,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:47,751 INFO L124 PetriNetUnfolderBase]: 1596/2690 cut-off events. [2023-11-19 07:36:47,751 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-19 07:36:47,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 2690 events. 1596/2690 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17495 event pairs, 1252 based on Foata normal form. 0/1868 useless extension candidates. Maximal degree in co-relation 757. Up to 2221 conditions per place. [2023-11-19 07:36:47,781 INFO L140 encePairwiseOnDemand]: 128/131 looper letters, 22 selfloop transitions, 0 changer transitions 0/37 dead transitions. [2023-11-19 07:36:47,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 136 flow [2023-11-19 07:36:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:36:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:36:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 137 transitions. [2023-11-19 07:36:47,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229007633587787 [2023-11-19 07:36:47,784 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 137 transitions. [2023-11-19 07:36:47,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 137 transitions. [2023-11-19 07:36:47,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:47,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 137 transitions. [2023-11-19 07:36:47,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 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) [2023-11-19 07:36:47,787 INFO L81 ComplementDD]: Finished complementDD. Result has 3 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) [2023-11-19 07:36:47,787 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 98 flow. Second operand 2 states and 137 transitions. [2023-11-19 07:36:47,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 136 flow [2023-11-19 07:36:47,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 134 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:47,791 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 90 flow [2023-11-19 07:36:47,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-19 07:36:47,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-19 07:36:47,795 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 90 flow [2023-11-19 07:36:47,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:47,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:47,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:36:47,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:36:47,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:47,797 INFO L85 PathProgramCache]: Analyzing trace with hash 18144, now seen corresponding path program 1 times [2023-11-19 07:36:47,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:47,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823021472] [2023-11-19 07:36:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:47,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:47,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:47,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823021472] [2023-11-19 07:36:47,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823021472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:47,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:47,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:47,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516624570] [2023-11-19 07:36:47,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:47,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:47,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:47,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 131 [2023-11-19 07:36:47,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:47,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:47,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 131 [2023-11-19 07:36:47,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:48,146 INFO L124 PetriNetUnfolderBase]: 1166/2004 cut-off events. [2023-11-19 07:36:48,146 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-11-19 07:36:48,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3736 conditions, 2004 events. 1166/2004 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12532 event pairs, 908 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 3730. Up to 1634 conditions per place. [2023-11-19 07:36:48,238 INFO L140 encePairwiseOnDemand]: 129/131 looper letters, 20 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-11-19 07:36:48,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 130 flow [2023-11-19 07:36:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-19 07:36:48,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44529262086513993 [2023-11-19 07:36:48,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-19 07:36:48,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-19 07:36:48,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:48,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-19 07:36:48,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,244 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 90 flow. Second operand 3 states and 175 transitions. [2023-11-19 07:36:48,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 130 flow [2023-11-19 07:36:48,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:48,249 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 90 flow [2023-11-19 07:36:48,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-19 07:36:48,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-11-19 07:36:48,251 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 90 flow [2023-11-19 07:36:48,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:48,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:36:48,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:36:48,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash 18143, now seen corresponding path program 1 times [2023-11-19 07:36:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:48,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491457699] [2023-11-19 07:36:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:48,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:48,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491457699] [2023-11-19 07:36:48,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491457699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:48,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:48,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:48,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515023258] [2023-11-19 07:36:48,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:48,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:48,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:48,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:48,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 131 [2023-11-19 07:36:48,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:48,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 131 [2023-11-19 07:36:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:48,514 INFO L124 PetriNetUnfolderBase]: 736/1318 cut-off events. [2023-11-19 07:36:48,514 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-11-19 07:36:48,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2466 conditions, 1318 events. 736/1318 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7721 event pairs, 564 based on Foata normal form. 0/1042 useless extension candidates. Maximal degree in co-relation 2459. Up to 1048 conditions per place. [2023-11-19 07:36:48,528 INFO L140 encePairwiseOnDemand]: 129/131 looper letters, 19 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-19 07:36:48,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 128 flow [2023-11-19 07:36:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-19 07:36:48,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42748091603053434 [2023-11-19 07:36:48,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-19 07:36:48,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-19 07:36:48,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:48,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-19 07:36:48,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,534 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 90 flow. Second operand 3 states and 168 transitions. [2023-11-19 07:36:48,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 128 flow [2023-11-19 07:36:48,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:48,536 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 89 flow [2023-11-19 07:36:48,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-11-19 07:36:48,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-11-19 07:36:48,538 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 89 flow [2023-11-19 07:36:48,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:48,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:48,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:36:48,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:36:48,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1123870663, now seen corresponding path program 1 times [2023-11-19 07:36:48,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:48,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155999602] [2023-11-19 07:36:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:48,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:48,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:48,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155999602] [2023-11-19 07:36:48,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155999602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:48,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:48,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:48,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828365004] [2023-11-19 07:36:48,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:48,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:48,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:48,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:48,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:48,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 131 [2023-11-19 07:36:48,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:48,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:48,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 131 [2023-11-19 07:36:48,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:49,506 INFO L124 PetriNetUnfolderBase]: 3340/4906 cut-off events. [2023-11-19 07:36:49,506 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-11-19 07:36:49,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10042 conditions, 4906 events. 3340/4906 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 28525 event pairs, 1049 based on Foata normal form. 44/4289 useless extension candidates. Maximal degree in co-relation 10035. Up to 2052 conditions per place. [2023-11-19 07:36:49,557 INFO L140 encePairwiseOnDemand]: 121/131 looper letters, 70 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-11-19 07:36:49,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 90 transitions, 393 flow [2023-11-19 07:36:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:36:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 370 transitions. [2023-11-19 07:36:49,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707379134860051 [2023-11-19 07:36:49,562 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 370 transitions. [2023-11-19 07:36:49,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 370 transitions. [2023-11-19 07:36:49,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:49,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 370 transitions. [2023-11-19 07:36:49,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,567 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,567 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 89 flow. Second operand 6 states and 370 transitions. [2023-11-19 07:36:49,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 90 transitions, 393 flow [2023-11-19 07:36:49,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 90 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:49,570 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 179 flow [2023-11-19 07:36:49,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-19 07:36:49,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-11-19 07:36:49,572 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 179 flow [2023-11-19 07:36:49,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:49,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:49,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:36:49,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:36:49,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:49,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2017568925, now seen corresponding path program 1 times [2023-11-19 07:36:49,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:49,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639653791] [2023-11-19 07:36:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:49,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:49,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:49,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639653791] [2023-11-19 07:36:49,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639653791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:49,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:49,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:49,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529149088] [2023-11-19 07:36:49,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:49,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:49,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:49,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:49,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 131 [2023-11-19 07:36:49,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:49,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:49,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 131 [2023-11-19 07:36:49,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:50,980 INFO L124 PetriNetUnfolderBase]: 5434/8184 cut-off events. [2023-11-19 07:36:50,980 INFO L125 PetriNetUnfolderBase]: For 3202/3254 co-relation queries the response was YES. [2023-11-19 07:36:51,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19124 conditions, 8184 events. 5434/8184 cut-off events. For 3202/3254 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 54836 event pairs, 1847 based on Foata normal form. 50/7370 useless extension candidates. Maximal degree in co-relation 19113. Up to 3679 conditions per place. [2023-11-19 07:36:51,058 INFO L140 encePairwiseOnDemand]: 124/131 looper letters, 75 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2023-11-19 07:36:51,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 103 transitions, 569 flow [2023-11-19 07:36:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:36:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 364 transitions. [2023-11-19 07:36:51,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631043256997455 [2023-11-19 07:36:51,060 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 364 transitions. [2023-11-19 07:36:51,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 364 transitions. [2023-11-19 07:36:51,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:51,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 364 transitions. [2023-11-19 07:36:51,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.666666666666664) internal successors, (364), 6 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:51,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:51,064 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:51,065 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 179 flow. Second operand 6 states and 364 transitions. [2023-11-19 07:36:51,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 103 transitions, 569 flow [2023-11-19 07:36:51,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 103 transitions, 569 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:51,073 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 309 flow [2023-11-19 07:36:51,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-11-19 07:36:51,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-11-19 07:36:51,074 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 309 flow [2023-11-19 07:36:51,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:51,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:51,074 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:36:51,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:36:51,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:36:51,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash 774011848, now seen corresponding path program 1 times [2023-11-19 07:36:51,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:51,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925587795] [2023-11-19 07:36:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:51,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:51,089 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:36:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:36:51,108 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:36:51,108 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:36:51,108 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-19 07:36:51,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-19 07:36:51,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-19 07:36:51,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-19 07:36:51,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-19 07:36:51,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-19 07:36:51,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-19 07:36:51,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-19 07:36:51,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:36:51,110 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-19 07:36:51,111 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:36:51,111 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:36:51,147 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:36:51,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 218 flow [2023-11-19 07:36:51,175 INFO L124 PetriNetUnfolderBase]: 13/165 cut-off events. [2023-11-19 07:36:51,175 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:36:51,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 165 events. 13/165 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 432 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 139. Up to 10 conditions per place. [2023-11-19 07:36:51,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 95 transitions, 218 flow [2023-11-19 07:36:51,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 95 transitions, 218 flow [2023-11-19 07:36:51,178 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:36:51,178 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 95 transitions, 218 flow [2023-11-19 07:36:51,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 95 transitions, 218 flow [2023-11-19 07:36:51,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 218 flow [2023-11-19 07:36:51,195 INFO L124 PetriNetUnfolderBase]: 13/165 cut-off events. [2023-11-19 07:36:51,196 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:36:51,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 165 events. 13/165 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 432 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 139. Up to 10 conditions per place. [2023-11-19 07:36:51,202 INFO L119 LiptonReduction]: Number of co-enabled transitions 5160 [2023-11-19 07:36:52,798 INFO L134 LiptonReduction]: Checked pairs total: 21840 [2023-11-19 07:36:52,798 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-11-19 07:36:52,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:52,801 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;@2492e070, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:52,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-19 07:36:52,802 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:52,803 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:36:52,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:52,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:52,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:52,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:36:52,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash 23608, now seen corresponding path program 1 times [2023-11-19 07:36:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:52,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322420529] [2023-11-19 07:36:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:52,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:52,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:52,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322420529] [2023-11-19 07:36:52,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322420529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:52,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:52,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:52,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759165563] [2023-11-19 07:36:52,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:52,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:36:52,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:36:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:36:52,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 154 [2023-11-19 07:36:52,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 130 flow. Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:52,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:52,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 154 [2023-11-19 07:36:52,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:54,878 INFO L124 PetriNetUnfolderBase]: 11096/16570 cut-off events. [2023-11-19 07:36:54,878 INFO L125 PetriNetUnfolderBase]: For 1921/1921 co-relation queries the response was YES. [2023-11-19 07:36:54,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31538 conditions, 16570 events. 11096/16570 cut-off events. For 1921/1921 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 117983 event pairs, 8752 based on Foata normal form. 0/11828 useless extension candidates. Maximal degree in co-relation 5058. Up to 14221 conditions per place. [2023-11-19 07:36:55,019 INFO L140 encePairwiseOnDemand]: 150/154 looper letters, 28 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2023-11-19 07:36:55,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 178 flow [2023-11-19 07:36:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:36:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:36:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 162 transitions. [2023-11-19 07:36:55,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2023-11-19 07:36:55,022 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 162 transitions. [2023-11-19 07:36:55,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 162 transitions. [2023-11-19 07:36:55,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:55,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 162 transitions. [2023-11-19 07:36:55,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:55,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:55,027 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:55,027 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 130 flow. Second operand 2 states and 162 transitions. [2023-11-19 07:36:55,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 178 flow [2023-11-19 07:36:55,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 172 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:55,032 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 116 flow [2023-11-19 07:36:55,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-19 07:36:55,034 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-11-19 07:36:55,035 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 116 flow [2023-11-19 07:36:55,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:55,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:55,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:55,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:36:55,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:36:55,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash 23614, now seen corresponding path program 1 times [2023-11-19 07:36:55,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:55,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850857828] [2023-11-19 07:36:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:55,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:55,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:55,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850857828] [2023-11-19 07:36:55,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850857828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:55,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:55,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127600310] [2023-11-19 07:36:55,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:55,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:55,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 154 [2023-11-19 07:36:55,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:55,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:55,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 154 [2023-11-19 07:36:55,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:56,648 INFO L124 PetriNetUnfolderBase]: 8166/12359 cut-off events. [2023-11-19 07:36:56,649 INFO L125 PetriNetUnfolderBase]: For 1015/1015 co-relation queries the response was YES. [2023-11-19 07:36:56,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23342 conditions, 12359 events. 8166/12359 cut-off events. For 1015/1015 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 85820 event pairs, 6408 based on Foata normal form. 0/9140 useless extension candidates. Maximal degree in co-relation 23335. Up to 10509 conditions per place. [2023-11-19 07:36:56,771 INFO L140 encePairwiseOnDemand]: 152/154 looper letters, 26 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-19 07:36:56,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 168 flow [2023-11-19 07:36:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-11-19 07:36:56,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2023-11-19 07:36:56,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-11-19 07:36:56,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-11-19 07:36:56,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:56,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-11-19 07:36:56,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:56,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:56,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:56,778 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 116 flow. Second operand 3 states and 208 transitions. [2023-11-19 07:36:56,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 168 flow [2023-11-19 07:36:56,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:56,782 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 116 flow [2023-11-19 07:36:56,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-11-19 07:36:56,783 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-11-19 07:36:56,783 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 116 flow [2023-11-19 07:36:56,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:56,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:56,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:56,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:36:56,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:36:56,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash 23613, now seen corresponding path program 1 times [2023-11-19 07:36:56,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:56,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915544876] [2023-11-19 07:36:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:56,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:56,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:56,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915544876] [2023-11-19 07:36:56,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915544876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:56,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:56,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:56,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888943796] [2023-11-19 07:36:56,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:56,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:56,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:56,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:56,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:56,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 154 [2023-11-19 07:36:56,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:56,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:56,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 154 [2023-11-19 07:36:56,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:57,953 INFO L124 PetriNetUnfolderBase]: 5236/8148 cut-off events. [2023-11-19 07:36:57,954 INFO L125 PetriNetUnfolderBase]: For 1015/1015 co-relation queries the response was YES. [2023-11-19 07:36:57,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15422 conditions, 8148 events. 5236/8148 cut-off events. For 1015/1015 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 54852 event pairs, 4064 based on Foata normal form. 0/6452 useless extension candidates. Maximal degree in co-relation 15414. Up to 6798 conditions per place. [2023-11-19 07:36:58,019 INFO L140 encePairwiseOnDemand]: 152/154 looper letters, 25 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-19 07:36:58,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 166 flow [2023-11-19 07:36:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-19 07:36:58,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2023-11-19 07:36:58,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-19 07:36:58,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-19 07:36:58,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:58,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-19 07:36:58,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,025 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 116 flow. Second operand 3 states and 201 transitions. [2023-11-19 07:36:58,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 166 flow [2023-11-19 07:36:58,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:58,030 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 115 flow [2023-11-19 07:36:58,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-11-19 07:36:58,031 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-11-19 07:36:58,031 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 115 flow [2023-11-19 07:36:58,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:58,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:58,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:36:58,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:36:58,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2008234123, now seen corresponding path program 1 times [2023-11-19 07:36:58,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:58,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538441094] [2023-11-19 07:36:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:58,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:58,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538441094] [2023-11-19 07:36:58,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538441094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:58,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:58,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:58,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905372485] [2023-11-19 07:36:58,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:58,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:36:58,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:36:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:36:58,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 154 [2023-11-19 07:36:58,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:58,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:58,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 154 [2023-11-19 07:36:58,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:03,251 INFO L124 PetriNetUnfolderBase]: 38126/50056 cut-off events. [2023-11-19 07:37:03,252 INFO L125 PetriNetUnfolderBase]: For 2308/2308 co-relation queries the response was YES. [2023-11-19 07:37:03,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102338 conditions, 50056 events. 38126/50056 cut-off events. For 2308/2308 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 300677 event pairs, 13503 based on Foata normal form. 132/43544 useless extension candidates. Maximal degree in co-relation 102330. Up to 22160 conditions per place. [2023-11-19 07:37:03,651 INFO L140 encePairwiseOnDemand]: 142/154 looper letters, 97 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2023-11-19 07:37:03,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 543 flow [2023-11-19 07:37:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:37:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:37:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 444 transitions. [2023-11-19 07:37:03,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2023-11-19 07:37:03,655 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 444 transitions. [2023-11-19 07:37:03,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 444 transitions. [2023-11-19 07:37:03,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:03,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 444 transitions. [2023-11-19 07:37:03,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:03,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:03,661 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:03,661 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 115 flow. Second operand 6 states and 444 transitions. [2023-11-19 07:37:03,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 543 flow [2023-11-19 07:37:03,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 122 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:37:03,667 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 232 flow [2023-11-19 07:37:03,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-11-19 07:37:03,668 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-11-19 07:37:03,668 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 232 flow [2023-11-19 07:37:03,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:03,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:03,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:03,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 07:37:03,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:37:03,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1021181748, now seen corresponding path program 1 times [2023-11-19 07:37:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:03,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061322208] [2023-11-19 07:37:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:03,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:37:03,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:03,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061322208] [2023-11-19 07:37:03,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061322208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:03,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:03,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:03,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348109973] [2023-11-19 07:37:03,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:03,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:03,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:03,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:03,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:03,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 154 [2023-11-19 07:37:03,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:03,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:03,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 154 [2023-11-19 07:37:03,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:13,730 INFO L124 PetriNetUnfolderBase]: 72724/96946 cut-off events. [2023-11-19 07:37:13,730 INFO L125 PetriNetUnfolderBase]: For 45163/45611 co-relation queries the response was YES. [2023-11-19 07:37:13,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231612 conditions, 96946 events. 72724/96946 cut-off events. For 45163/45611 co-relation queries the response was YES. Maximal size of possible extension queue 5143. Compared 661199 event pairs, 26615 based on Foata normal form. 426/86754 useless extension candidates. Maximal degree in co-relation 231600. Up to 44665 conditions per place. [2023-11-19 07:37:14,721 INFO L140 encePairwiseOnDemand]: 146/154 looper letters, 108 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2023-11-19 07:37:14,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 144 transitions, 805 flow [2023-11-19 07:37:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:37:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:37:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 436 transitions. [2023-11-19 07:37:14,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2023-11-19 07:37:14,724 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 436 transitions. [2023-11-19 07:37:14,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 436 transitions. [2023-11-19 07:37:14,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:14,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 436 transitions. [2023-11-19 07:37:14,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.66666666666667) internal successors, (436), 6 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:14,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:14,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:14,730 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 232 flow. Second operand 6 states and 436 transitions. [2023-11-19 07:37:14,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 144 transitions, 805 flow [2023-11-19 07:37:14,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 144 transitions, 805 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:37:14,823 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 403 flow [2023-11-19 07:37:14,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=403, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-11-19 07:37:14,824 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-11-19 07:37:14,824 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 403 flow [2023-11-19 07:37:14,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:14,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:14,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:14,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-19 07:37:14,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 07:37:14,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:14,826 INFO L85 PathProgramCache]: Analyzing trace with hash 730507368, now seen corresponding path program 1 times [2023-11-19 07:37:14,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:14,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972771660] [2023-11-19 07:37:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:14,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:37:14,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972771660] [2023-11-19 07:37:14,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972771660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:14,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:14,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:14,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474601983] [2023-11-19 07:37:14,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:14,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:14,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:14,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:14,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:15,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 154 [2023-11-19 07:37:15,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 403 flow. Second operand has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:15,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:15,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 154 [2023-11-19 07:37:15,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand