./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.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_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/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_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/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_af50c5ee-69df-4c15-8d23-388cf4c7c546/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 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:30,164 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:30,240 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:00:30,245 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:30,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:30,274 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:30,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:30,275 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:30,276 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:30,276 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:30,277 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:30,278 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:30,278 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:30,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:30,279 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:30,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:30,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:30,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:30,282 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:00:30,299 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:00:30,299 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:00:30,300 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:30,300 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:00:30,301 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:00:30,301 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:30,302 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:30,302 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:30,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:30,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:30,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:30,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:30,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:30,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:30,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:30,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:30,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:30,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:30,306 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:30,306 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_af50c5ee-69df-4c15-8d23-388cf4c7c546/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 [2023-11-19 08:00:30,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:30,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:30,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:30,591 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:30,592 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:30,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2023-11-19 08:00:33,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:33,997 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:33,998 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2023-11-19 08:00:34,015 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/data/8529a85a9/f6df6cb318684f5e93dab6d1d1f7cec0/FLAGe7d9d0e09 [2023-11-19 08:00:34,033 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/data/8529a85a9/f6df6cb318684f5e93dab6d1d1f7cec0 [2023-11-19 08:00:34,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:34,038 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:34,040 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:34,040 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:34,046 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:34,047 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,048 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c276b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34, skipping insertion in model container [2023-11-19 08:00:34,048 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,096 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:34,339 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 08:00:34,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:34,521 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:34,551 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 08:00:34,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:34,646 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:34,646 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:34,646 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:00:34,655 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:34,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34 WrapperNode [2023-11-19 08:00:34,656 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:34,657 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:34,657 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:34,657 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:34,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,690 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,735 INFO L138 Inliner]: procedures = 176, calls = 22, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 78 [2023-11-19 08:00:34,735 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:34,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:34,737 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:34,737 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:34,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,751 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,765 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:34,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:34,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:34,772 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:34,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2023-11-19 08:00:34,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:34,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:34,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:34,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af50c5ee-69df-4c15-8d23-388cf4c7c546/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:34,882 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 08:00:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 08:00:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:00:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:00:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:34,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:34,888 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 08:00:35,105 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:35,108 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:35,344 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:35,452 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:35,452 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:00:35,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:35 BoogieIcfgContainer [2023-11-19 08:00:35,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:35,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:35,459 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:35,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:35,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:34" (1/3) ... [2023-11-19 08:00:35,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5db1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:35, skipping insertion in model container [2023-11-19 08:00:35,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (2/3) ... [2023-11-19 08:00:35,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5db1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:35, skipping insertion in model container [2023-11-19 08:00:35,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:35" (3/3) ... [2023-11-19 08:00:35,466 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2023-11-19 08:00:35,485 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:35,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 08:00:35,485 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:00:35,546 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:35,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 72 transitions, 148 flow [2023-11-19 08:00:35,635 INFO L124 PetriNetUnfolderBase]: 5/88 cut-off events. [2023-11-19 08:00:35,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:35,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 88 events. 5/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 113 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-19 08:00:35,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 72 transitions, 148 flow [2023-11-19 08:00:35,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 72 transitions, 148 flow [2023-11-19 08:00:35,656 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:35,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 72 transitions, 148 flow [2023-11-19 08:00:35,669 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 72 transitions, 148 flow [2023-11-19 08:00:35,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 72 transitions, 148 flow [2023-11-19 08:00:35,709 INFO L124 PetriNetUnfolderBase]: 5/88 cut-off events. [2023-11-19 08:00:35,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:35,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 88 events. 5/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 113 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-19 08:00:35,714 INFO L119 LiptonReduction]: Number of co-enabled transitions 1520 [2023-11-19 08:00:37,958 INFO L134 LiptonReduction]: Checked pairs total: 1367 [2023-11-19 08:00:37,959 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-11-19 08:00:37,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:37,986 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;@206aa2fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:37,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 08:00:37,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:37,989 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 08:00:37,989 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:37,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:37,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:37,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 08:00:37,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash 12205, now seen corresponding path program 1 times [2023-11-19 08:00:38,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:38,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426780277] [2023-11-19 08:00:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:38,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:38,309 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 08:00:38,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:38,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426780277] [2023-11-19 08:00:38,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426780277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:38,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:38,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648145418] [2023-11-19 08:00:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:38,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:38,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:38,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 147 [2023-11-19 08:00:38,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 13 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 08:00:38,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:38,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 147 [2023-11-19 08:00:38,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:38,456 INFO L124 PetriNetUnfolderBase]: 13/33 cut-off events. [2023-11-19 08:00:38,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:38,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 33 events. 13/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 66 event pairs, 9 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 56. Up to 32 conditions per place. [2023-11-19 08:00:38,459 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 8 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2023-11-19 08:00:38,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 10 transitions, 42 flow [2023-11-19 08:00:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2023-11-19 08:00:38,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2023-11-19 08:00:38,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2023-11-19 08:00:38,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2023-11-19 08:00:38,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:38,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2023-11-19 08:00:38,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:38,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 08:00:38,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 08:00:38,509 INFO L175 Difference]: Start difference. First operand has 15 places, 13 transitions, 30 flow. Second operand 3 states and 180 transitions. [2023-11-19 08:00:38,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 10 transitions, 42 flow [2023-11-19 08:00:38,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:38,515 INFO L231 Difference]: Finished difference. Result has 14 places, 10 transitions, 26 flow [2023-11-19 08:00:38,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=14, PETRI_TRANSITIONS=10} [2023-11-19 08:00:38,523 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, -1 predicate places. [2023-11-19 08:00:38,523 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 10 transitions, 26 flow [2023-11-19 08:00:38,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 08:00:38,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:38,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:38,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:38,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 08:00:38,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash 12207, now seen corresponding path program 1 times [2023-11-19 08:00:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:38,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446251414] [2023-11-19 08:00:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:38,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:38,673 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 08:00:38,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:38,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446251414] [2023-11-19 08:00:38,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446251414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:38,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:38,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:38,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033409638] [2023-11-19 08:00:38,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:38,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:38,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:38,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 147 [2023-11-19 08:00:38,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 10 transitions, 26 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 08:00:38,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:38,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 147 [2023-11-19 08:00:38,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:38,740 INFO L124 PetriNetUnfolderBase]: 9/24 cut-off events. [2023-11-19 08:00:38,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:38,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 24 events. 9/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 40 event pairs, 6 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 47. Up to 23 conditions per place. [2023-11-19 08:00:38,742 INFO L140 encePairwiseOnDemand]: 145/147 looper letters, 7 selfloop transitions, 1 changer transitions 0/9 dead transitions. [2023-11-19 08:00:38,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 9 transitions, 40 flow [2023-11-19 08:00:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2023-11-19 08:00:38,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2023-11-19 08:00:38,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2023-11-19 08:00:38,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2023-11-19 08:00:38,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:38,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2023-11-19 08:00:38,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 08:00:38,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 08:00:38,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 08:00:38,754 INFO L175 Difference]: Start difference. First operand has 14 places, 10 transitions, 26 flow. Second operand 3 states and 183 transitions. [2023-11-19 08:00:38,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 9 transitions, 40 flow [2023-11-19 08:00:38,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 9 transitions, 39 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:38,755 INFO L231 Difference]: Finished difference. Result has 14 places, 9 transitions, 25 flow [2023-11-19 08:00:38,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=25, PETRI_PLACES=14, PETRI_TRANSITIONS=9} [2023-11-19 08:00:38,756 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, -1 predicate places. [2023-11-19 08:00:38,756 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 9 transitions, 25 flow [2023-11-19 08:00:38,756 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 08:00:38,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:38,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:00:38,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:00:38,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 08:00:38,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash 11739052, now seen corresponding path program 1 times [2023-11-19 08:00:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:38,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362975778] [2023-11-19 08:00:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:38,865 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 08:00:38,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:38,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362975778] [2023-11-19 08:00:38,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362975778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:38,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:38,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:38,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537379632] [2023-11-19 08:00:38,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:38,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:38,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:38,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:38,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:38,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 147 [2023-11-19 08:00:38,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 08:00:38,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:38,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 147 [2023-11-19 08:00:38,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:38,909 INFO L124 PetriNetUnfolderBase]: 7/19 cut-off events. [2023-11-19 08:00:38,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:38,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 2 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 37. Up to 13 conditions per place. [2023-11-19 08:00:38,910 INFO L140 encePairwiseOnDemand]: 144/147 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2023-11-19 08:00:38,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 10 transitions, 45 flow [2023-11-19 08:00:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-11-19 08:00:38,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376417233560091 [2023-11-19 08:00:38,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-11-19 08:00:38,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-11-19 08:00:38,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:38,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-11-19 08:00:38,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 08:00:38,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 08:00:38,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 08:00:38,919 INFO L175 Difference]: Start difference. First operand has 14 places, 9 transitions, 25 flow. Second operand 3 states and 193 transitions. [2023-11-19 08:00:38,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 10 transitions, 45 flow [2023-11-19 08:00:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 44 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:38,920 INFO L231 Difference]: Finished difference. Result has 14 places, 8 transitions, 26 flow [2023-11-19 08:00:38,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=14, PETRI_TRANSITIONS=8} [2023-11-19 08:00:38,921 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, -1 predicate places. [2023-11-19 08:00:38,921 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 8 transitions, 26 flow [2023-11-19 08:00:38,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 08:00:38,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:38,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:00:38,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:00:38,923 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 08:00:38,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1603709401, now seen corresponding path program 1 times [2023-11-19 08:00:38,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:38,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800042276] [2023-11-19 08:00:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:38,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:38,941 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:00:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:38,986 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:00:38,987 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:00:38,990 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 08:00:38,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-19 08:00:38,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-19 08:00:38,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-19 08:00:38,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-19 08:00:38,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-19 08:00:38,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:00:38,997 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 08:00:39,002 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:00:39,002 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:00:39,044 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:39,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 113 transitions, 236 flow [2023-11-19 08:00:39,081 INFO L124 PetriNetUnfolderBase]: 9/147 cut-off events. [2023-11-19 08:00:39,081 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:00:39,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 9/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 317 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-11-19 08:00:39,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 113 transitions, 236 flow [2023-11-19 08:00:39,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 113 transitions, 236 flow [2023-11-19 08:00:39,087 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:39,087 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 113 transitions, 236 flow [2023-11-19 08:00:39,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 113 transitions, 236 flow [2023-11-19 08:00:39,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 113 transitions, 236 flow [2023-11-19 08:00:39,114 INFO L124 PetriNetUnfolderBase]: 9/147 cut-off events. [2023-11-19 08:00:39,115 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:00:39,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 9/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 317 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-11-19 08:00:39,124 INFO L119 LiptonReduction]: Number of co-enabled transitions 6320 [2023-11-19 08:00:41,579 INFO L134 LiptonReduction]: Checked pairs total: 8162 [2023-11-19 08:00:41,580 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-11-19 08:00:41,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:41,583 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;@206aa2fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:41,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:00:41,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:41,585 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:00:41,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:41,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:41,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:41,586 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 08:00:41,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash 20584, now seen corresponding path program 1 times [2023-11-19 08:00:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:41,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307712310] [2023-11-19 08:00:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:41,622 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 08:00:41,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307712310] [2023-11-19 08:00:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307712310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:41,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:41,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896877799] [2023-11-19 08:00:41,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:00:41,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:41,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:00:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:41,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 227 [2023-11-19 08:00:41,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 68 flow. Second operand has 2 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 08:00:41,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:41,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 227 [2023-11-19 08:00:41,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:41,814 INFO L124 PetriNetUnfolderBase]: 481/790 cut-off events. [2023-11-19 08:00:41,815 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-19 08:00:41,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 790 events. 481/790 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4073 event pairs, 413 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 706. Up to 774 conditions per place. [2023-11-19 08:00:41,825 INFO L140 encePairwiseOnDemand]: 223/227 looper letters, 22 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-11-19 08:00:41,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 104 flow [2023-11-19 08:00:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:00:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:00:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2023-11-19 08:00:41,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845814977973568 [2023-11-19 08:00:41,833 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2023-11-19 08:00:41,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2023-11-19 08:00:41,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:41,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2023-11-19 08:00:41,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 08:00:41,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 08:00:41,839 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 08:00:41,839 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 68 flow. Second operand 2 states and 220 transitions. [2023-11-19 08:00:41,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 104 flow [2023-11-19 08:00:41,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:41,842 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 60 flow [2023-11-19 08:00:41,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-11-19 08:00:41,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-11-19 08:00:41,845 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 60 flow [2023-11-19 08:00:41,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 08:00:41,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:41,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:41,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:00:41,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:00:41,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash 20604, now seen corresponding path program 1 times [2023-11-19 08:00:41,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:41,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143931171] [2023-11-19 08:00:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:41,941 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 08:00:41,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:41,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143931171] [2023-11-19 08:00:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143931171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050206535] [2023-11-19 08:00:41,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:41,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:41,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 227 [2023-11-19 08:00:41,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 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 08:00:41,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:41,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 227 [2023-11-19 08:00:41,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:42,090 INFO L124 PetriNetUnfolderBase]: 345/581 cut-off events. [2023-11-19 08:00:42,091 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-19 08:00:42,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 581 events. 345/581 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2828 event pairs, 294 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 1171. Up to 564 conditions per place. [2023-11-19 08:00:42,097 INFO L140 encePairwiseOnDemand]: 225/227 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-19 08:00:42,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 24 transitions, 100 flow [2023-11-19 08:00:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-11-19 08:00:42,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43759177679882527 [2023-11-19 08:00:42,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-11-19 08:00:42,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-11-19 08:00:42,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:42,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-11-19 08:00:42,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 08:00:42,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 08:00:42,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 08:00:42,107 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 60 flow. Second operand 3 states and 298 transitions. [2023-11-19 08:00:42,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 24 transitions, 100 flow [2023-11-19 08:00:42,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:42,109 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 60 flow [2023-11-19 08:00:42,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-11-19 08:00:42,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-11-19 08:00:42,115 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 60 flow [2023-11-19 08:00:42,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 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 08:00:42,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:42,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:42,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:00:42,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:00:42,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash 20603, now seen corresponding path program 1 times [2023-11-19 08:00:42,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:42,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506732922] [2023-11-19 08:00:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:42,223 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 08:00:42,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:42,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506732922] [2023-11-19 08:00:42,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506732922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:42,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:42,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:42,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541457523] [2023-11-19 08:00:42,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:42,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:42,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:42,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:42,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 227 [2023-11-19 08:00:42,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 08:00:42,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:42,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 227 [2023-11-19 08:00:42,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:42,360 INFO L124 PetriNetUnfolderBase]: 209/372 cut-off events. [2023-11-19 08:00:42,361 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-19 08:00:42,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 372 events. 209/372 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1555 event pairs, 175 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 754. Up to 355 conditions per place. [2023-11-19 08:00:42,364 INFO L140 encePairwiseOnDemand]: 225/227 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-11-19 08:00:42,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 23 transitions, 98 flow [2023-11-19 08:00:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-11-19 08:00:42,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42731277533039647 [2023-11-19 08:00:42,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-11-19 08:00:42,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-11-19 08:00:42,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:42,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-11-19 08:00:42,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 08:00:42,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 08:00:42,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 08:00:42,373 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 60 flow. Second operand 3 states and 291 transitions. [2023-11-19 08:00:42,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 23 transitions, 98 flow [2023-11-19 08:00:42,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 23 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:42,375 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 59 flow [2023-11-19 08:00:42,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-11-19 08:00:42,376 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-11-19 08:00:42,376 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 59 flow [2023-11-19 08:00:42,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 08:00:42,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:42,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:00:42,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:00:42,377 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 08:00:42,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash 19814936, now seen corresponding path program 1 times [2023-11-19 08:00:42,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:42,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259989681] [2023-11-19 08:00:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:42,405 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 08:00:42,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:42,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259989681] [2023-11-19 08:00:42,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259989681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:42,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:42,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065487466] [2023-11-19 08:00:42,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:42,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 227 [2023-11-19 08:00:42,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 08:00:42,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:42,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 227 [2023-11-19 08:00:42,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:42,500 INFO L124 PetriNetUnfolderBase]: 170/306 cut-off events. [2023-11-19 08:00:42,500 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 08:00:42,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 306 events. 170/306 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1275 event pairs, 72 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 623. Up to 148 conditions per place. [2023-11-19 08:00:42,504 INFO L140 encePairwiseOnDemand]: 222/227 looper letters, 31 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-11-19 08:00:42,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 160 flow [2023-11-19 08:00:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-11-19 08:00:42,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669603524229075 [2023-11-19 08:00:42,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-11-19 08:00:42,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-11-19 08:00:42,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:42,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-11-19 08:00:42,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 08:00:42,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 08:00:42,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 08:00:42,513 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 59 flow. Second operand 3 states and 318 transitions. [2023-11-19 08:00:42,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 160 flow [2023-11-19 08:00:42,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:42,515 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 79 flow [2023-11-19 08:00:42,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-11-19 08:00:42,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-19 08:00:42,517 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 79 flow [2023-11-19 08:00:42,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 08:00:42,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:42,518 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 08:00:42,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:00:42,518 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 08:00:42,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash -100182152, now seen corresponding path program 1 times [2023-11-19 08:00:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:42,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430050359] [2023-11-19 08:00:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:42,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:00:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:42,561 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:00:42,561 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:00:42,561 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 08:00:42,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-19 08:00:42,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 08:00:42,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 08:00:42,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-19 08:00:42,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 08:00:42,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 08:00:42,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:00:42,563 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 08:00:42,564 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:00:42,565 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:00:42,610 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:42,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 154 transitions, 326 flow [2023-11-19 08:00:42,654 INFO L124 PetriNetUnfolderBase]: 13/206 cut-off events. [2023-11-19 08:00:42,655 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:00:42,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 13/206 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 573 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 151. Up to 8 conditions per place. [2023-11-19 08:00:42,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 154 transitions, 326 flow [2023-11-19 08:00:42,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 154 transitions, 326 flow [2023-11-19 08:00:42,661 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:42,661 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 154 transitions, 326 flow [2023-11-19 08:00:42,662 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 154 transitions, 326 flow [2023-11-19 08:00:42,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 154 transitions, 326 flow [2023-11-19 08:00:42,694 INFO L124 PetriNetUnfolderBase]: 13/206 cut-off events. [2023-11-19 08:00:42,694 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:00:42,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 13/206 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 573 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 151. Up to 8 conditions per place. [2023-11-19 08:00:42,709 INFO L119 LiptonReduction]: Number of co-enabled transitions 14400 [2023-11-19 08:00:45,699 INFO L134 LiptonReduction]: Checked pairs total: 17717 [2023-11-19 08:00:45,699 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-19 08:00:45,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:45,702 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;@206aa2fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:45,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 08:00:45,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:45,704 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:00:45,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:45,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:45,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:45,705 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 08:00:45,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:45,706 INFO L85 PathProgramCache]: Analyzing trace with hash 31857, now seen corresponding path program 1 times [2023-11-19 08:00:45,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:45,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501229626] [2023-11-19 08:00:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:45,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:45,716 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 08:00:45,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501229626] [2023-11-19 08:00:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501229626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:45,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:45,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:45,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506589551] [2023-11-19 08:00:45,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:45,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:00:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:45,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:00:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:45,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 304 [2023-11-19 08:00:45,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 flow. Second operand has 2 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 08:00:45,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:45,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 304 [2023-11-19 08:00:45,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:46,837 INFO L124 PetriNetUnfolderBase]: 6177/8649 cut-off events. [2023-11-19 08:00:46,838 INFO L125 PetriNetUnfolderBase]: For 511/511 co-relation queries the response was YES. [2023-11-19 08:00:46,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17453 conditions, 8649 events. 6177/8649 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 49073 event pairs, 5341 based on Foata normal form. 0/5705 useless extension candidates. Maximal degree in co-relation 1598. Up to 8518 conditions per place. [2023-11-19 08:00:46,918 INFO L140 encePairwiseOnDemand]: 299/304 looper letters, 31 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2023-11-19 08:00:46,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 148 flow [2023-11-19 08:00:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:00:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:00:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 298 transitions. [2023-11-19 08:00:46,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4901315789473684 [2023-11-19 08:00:46,921 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 298 transitions. [2023-11-19 08:00:46,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 298 transitions. [2023-11-19 08:00:46,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:46,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 298 transitions. [2023-11-19 08:00:46,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 08:00:46,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 08:00:46,928 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 08:00:46,928 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 2 states and 298 transitions. [2023-11-19 08:00:46,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 148 flow [2023-11-19 08:00:46,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 146 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:46,932 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 84 flow [2023-11-19 08:00:46,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-19 08:00:46,936 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-11-19 08:00:46,937 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 84 flow [2023-11-19 08:00:46,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 08:00:46,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:46,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:46,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:00:46,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 08:00:46,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash 31880, now seen corresponding path program 1 times [2023-11-19 08:00:46,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:46,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405760716] [2023-11-19 08:00:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:46,978 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 08:00:46,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:46,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405760716] [2023-11-19 08:00:46,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405760716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:46,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:46,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:46,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805171456] [2023-11-19 08:00:46,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:46,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:46,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:47,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 304 [2023-11-19 08:00:47,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 08:00:47,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:47,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 304 [2023-11-19 08:00:47,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:47,793 INFO L124 PetriNetUnfolderBase]: 4505/6392 cut-off events. [2023-11-19 08:00:47,793 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2023-11-19 08:00:47,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12876 conditions, 6392 events. 4505/6392 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34824 event pairs, 3878 based on Foata normal form. 0/4451 useless extension candidates. Maximal degree in co-relation 12870. Up to 6260 conditions per place. [2023-11-19 08:00:47,850 INFO L140 encePairwiseOnDemand]: 302/304 looper letters, 29 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-19 08:00:47,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 142 flow [2023-11-19 08:00:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-11-19 08:00:47,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418859649122807 [2023-11-19 08:00:47,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-11-19 08:00:47,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-11-19 08:00:47,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:47,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-11-19 08:00:47,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 08:00:47,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 08:00:47,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 08:00:47,859 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 84 flow. Second operand 3 states and 403 transitions. [2023-11-19 08:00:47,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 142 flow [2023-11-19 08:00:47,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:47,864 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 84 flow [2023-11-19 08:00:47,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-11-19 08:00:47,866 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-19 08:00:47,868 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 84 flow [2023-11-19 08:00:47,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 08:00:47,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:47,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:00:47,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 08:00:47,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 31881, now seen corresponding path program 1 times [2023-11-19 08:00:47,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:47,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389643512] [2023-11-19 08:00:47,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:47,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:47,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:47,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389643512] [2023-11-19 08:00:47,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389643512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:47,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:47,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:47,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714208979] [2023-11-19 08:00:47,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:47,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:47,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 304 [2023-11-19 08:00:47,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 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 08:00:47,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:47,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 304 [2023-11-19 08:00:47,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:48,644 INFO L124 PetriNetUnfolderBase]: 2833/4135 cut-off events. [2023-11-19 08:00:48,644 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2023-11-19 08:00:48,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8364 conditions, 4135 events. 2833/4135 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21102 event pairs, 2415 based on Foata normal form. 0/3197 useless extension candidates. Maximal degree in co-relation 8357. Up to 4003 conditions per place. [2023-11-19 08:00:48,678 INFO L140 encePairwiseOnDemand]: 302/304 looper letters, 28 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-19 08:00:48,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 140 flow [2023-11-19 08:00:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-11-19 08:00:48,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-11-19 08:00:48,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-11-19 08:00:48,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-11-19 08:00:48,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:48,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-11-19 08:00:48,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 08:00:48,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 08:00:48,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 08:00:48,687 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 84 flow. Second operand 3 states and 408 transitions. [2023-11-19 08:00:48,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 140 flow [2023-11-19 08:00:48,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 32 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:48,691 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 83 flow [2023-11-19 08:00:48,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-11-19 08:00:48,693 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-19 08:00:48,693 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 83 flow [2023-11-19 08:00:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 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 08:00:48,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:48,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:00:48,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:00:48,695 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 08:00:48,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:48,695 INFO L85 PathProgramCache]: Analyzing trace with hash 30662021, now seen corresponding path program 1 times [2023-11-19 08:00:48,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:48,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066590400] [2023-11-19 08:00:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:48,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:48,735 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 08:00:48,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:48,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066590400] [2023-11-19 08:00:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066590400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:48,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:48,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744110729] [2023-11-19 08:00:48,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:48,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:48,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:48,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:48,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:48,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 304 [2023-11-19 08:00:48,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 08:00:48,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:48,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 304 [2023-11-19 08:00:48,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:49,217 INFO L124 PetriNetUnfolderBase]: 2262/3296 cut-off events. [2023-11-19 08:00:49,218 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-11-19 08:00:49,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6713 conditions, 3296 events. 2262/3296 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16786 event pairs, 770 based on Foata normal form. 0/2740 useless extension candidates. Maximal degree in co-relation 6706. Up to 2179 conditions per place. [2023-11-19 08:00:49,242 INFO L140 encePairwiseOnDemand]: 297/304 looper letters, 46 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-11-19 08:00:49,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 235 flow [2023-11-19 08:00:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-11-19 08:00:49,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758771929824561 [2023-11-19 08:00:49,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-11-19 08:00:49,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-11-19 08:00:49,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:49,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-11-19 08:00:49,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 08:00:49,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 08:00:49,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 08:00:49,252 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 83 flow. Second operand 3 states and 434 transitions. [2023-11-19 08:00:49,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 235 flow [2023-11-19 08:00:49,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:49,254 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 112 flow [2023-11-19 08:00:49,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-19 08:00:49,255 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-19 08:00:49,255 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 112 flow [2023-11-19 08:00:49,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 08:00:49,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:49,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:49,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:00:49,257 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 08:00:49,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1558912966, now seen corresponding path program 1 times [2023-11-19 08:00:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:49,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969531205] [2023-11-19 08:00:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:49,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:49,323 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 08:00:49,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:49,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969531205] [2023-11-19 08:00:49,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969531205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:49,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:49,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:49,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633834244] [2023-11-19 08:00:49,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:49,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:49,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:49,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 304 [2023-11-19 08:00:49,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 08:00:49,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:49,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 304 [2023-11-19 08:00:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:49,705 INFO L124 PetriNetUnfolderBase]: 1926/2820 cut-off events. [2023-11-19 08:00:49,705 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2023-11-19 08:00:49,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6223 conditions, 2820 events. 1926/2820 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13438 event pairs, 1530 based on Foata normal form. 152/2930 useless extension candidates. Maximal degree in co-relation 6215. Up to 2726 conditions per place. [2023-11-19 08:00:49,724 INFO L140 encePairwiseOnDemand]: 300/304 looper letters, 28 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-19 08:00:49,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 158 flow [2023-11-19 08:00:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-11-19 08:00:49,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44956140350877194 [2023-11-19 08:00:49,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-11-19 08:00:49,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-11-19 08:00:49,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:49,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-11-19 08:00:49,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 08:00:49,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 08:00:49,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 08:00:49,733 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 112 flow. Second operand 3 states and 410 transitions. [2023-11-19 08:00:49,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 158 flow [2023-11-19 08:00:49,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 32 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:49,736 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 98 flow [2023-11-19 08:00:49,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-11-19 08:00:49,737 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-19 08:00:49,737 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 98 flow [2023-11-19 08:00:49,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 08:00:49,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:49,738 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 08:00:49,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:00:49,738 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 08:00:49,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:49,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1882902221, now seen corresponding path program 1 times [2023-11-19 08:00:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:49,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362796978] [2023-11-19 08:00:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:49,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:49,754 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:00:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:49,767 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:00:49,767 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:00:49,767 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-19 08:00:49,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-19 08:00:49,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-19 08:00:49,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-19 08:00:49,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-19 08:00:49,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-19 08:00:49,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-19 08:00:49,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-19 08:00:49,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 08:00:49,769 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-19 08:00:49,770 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:00:49,770 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 08:00:49,804 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:49,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 195 transitions, 418 flow [2023-11-19 08:00:49,847 INFO L124 PetriNetUnfolderBase]: 17/265 cut-off events. [2023-11-19 08:00:49,848 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:00:49,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 265 events. 17/265 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 845 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 214. Up to 10 conditions per place. [2023-11-19 08:00:49,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 195 transitions, 418 flow [2023-11-19 08:00:49,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 195 transitions, 418 flow [2023-11-19 08:00:49,853 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:49,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 195 transitions, 418 flow [2023-11-19 08:00:49,854 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 195 transitions, 418 flow [2023-11-19 08:00:49,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 195 transitions, 418 flow [2023-11-19 08:00:49,893 INFO L124 PetriNetUnfolderBase]: 17/265 cut-off events. [2023-11-19 08:00:49,894 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:00:49,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 265 events. 17/265 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 845 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 214. Up to 10 conditions per place. [2023-11-19 08:00:49,917 INFO L119 LiptonReduction]: Number of co-enabled transitions 25760 [2023-11-19 08:00:53,864 INFO L134 LiptonReduction]: Checked pairs total: 32557 [2023-11-19 08:00:53,865 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-11-19 08:00:53,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:53,867 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;@206aa2fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:53,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-19 08:00:53,869 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:53,869 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:00:53,869 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:53,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:53,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:53,870 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 08:00:53,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:53,870 INFO L85 PathProgramCache]: Analyzing trace with hash 45078, now seen corresponding path program 1 times [2023-11-19 08:00:53,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:53,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550871442] [2023-11-19 08:00:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:53,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:53,882 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 08:00:53,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:53,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550871442] [2023-11-19 08:00:53,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550871442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:53,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342459923] [2023-11-19 08:00:53,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:53,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:00:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:00:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:53,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 390 [2023-11-19 08:00:53,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 122 flow. Second operand has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:53,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:53,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 390 [2023-11-19 08:00:53,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:01,831 INFO L124 PetriNetUnfolderBase]: 59681/77153 cut-off events. [2023-11-19 08:01:01,831 INFO L125 PetriNetUnfolderBase]: For 6631/6631 co-relation queries the response was YES. [2023-11-19 08:01:01,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155782 conditions, 77153 events. 59681/77153 cut-off events. For 6631/6631 co-relation queries the response was YES. Maximal size of possible extension queue 3398. Compared 459090 event pairs, 51485 based on Foata normal form. 0/51746 useless extension candidates. Maximal degree in co-relation 15488. Up to 76102 conditions per place. [2023-11-19 08:01:02,443 INFO L140 encePairwiseOnDemand]: 385/390 looper letters, 39 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2023-11-19 08:01:02,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 190 flow [2023-11-19 08:01:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:01:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:01:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 374 transitions. [2023-11-19 08:01:02,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794871794871795 [2023-11-19 08:01:02,447 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 374 transitions. [2023-11-19 08:01:02,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 374 transitions. [2023-11-19 08:01:02,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:02,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 374 transitions. [2023-11-19 08:01:02,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 187.0) internal successors, (374), 2 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 08:01:02,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 08:01:02,455 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 08:01:02,455 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 122 flow. Second operand 2 states and 374 transitions. [2023-11-19 08:01:02,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 190 flow [2023-11-19 08:01:02,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 42 transitions, 184 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:02,466 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 106 flow [2023-11-19 08:01:02,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-11-19 08:01:02,469 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-11-19 08:01:02,469 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 106 flow [2023-11-19 08:01:02,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:02,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:02,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:01:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 08:01:02,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:01:02,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash 45106, now seen corresponding path program 1 times [2023-11-19 08:01:02,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:02,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066273026] [2023-11-19 08:01:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:02,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:02,505 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 08:01:02,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066273026] [2023-11-19 08:01:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066273026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:02,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:02,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:02,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754157788] [2023-11-19 08:01:02,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:02,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:02,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:02,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 390 [2023-11-19 08:01:02,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 08:01:02,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:02,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 390 [2023-11-19 08:01:02,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:07,972 INFO L124 PetriNetUnfolderBase]: 43865/57232 cut-off events. [2023-11-19 08:01:07,973 INFO L125 PetriNetUnfolderBase]: For 3388/3388 co-relation queries the response was YES. [2023-11-19 08:01:08,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114981 conditions, 57232 events. 43865/57232 cut-off events. For 3388/3388 co-relation queries the response was YES. Maximal size of possible extension queue 2396. Compared 330431 event pairs, 37718 based on Foata normal form. 0/40028 useless extension candidates. Maximal degree in co-relation 114974. Up to 56180 conditions per place. [2023-11-19 08:01:08,362 INFO L140 encePairwiseOnDemand]: 388/390 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-19 08:01:08,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 180 flow [2023-11-19 08:01:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-11-19 08:01:08,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43846153846153846 [2023-11-19 08:01:08,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-11-19 08:01:08,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-11-19 08:01:08,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:08,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-11-19 08:01:08,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 08:01:08,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 08:01:08,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 08:01:08,374 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 106 flow. Second operand 3 states and 513 transitions. [2023-11-19 08:01:08,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 180 flow [2023-11-19 08:01:08,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 41 transitions, 180 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:08,400 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 106 flow [2023-11-19 08:01:08,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-11-19 08:01:08,401 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-11-19 08:01:08,402 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 106 flow [2023-11-19 08:01:08,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 08:01:08,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:08,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:01:08,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 08:01:08,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:01:08,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:08,403 INFO L85 PathProgramCache]: Analyzing trace with hash 45107, now seen corresponding path program 1 times [2023-11-19 08:01:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:08,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869997026] [2023-11-19 08:01:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:08,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:08,444 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 08:01:08,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:08,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869997026] [2023-11-19 08:01:08,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869997026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:08,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:08,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:08,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179467111] [2023-11-19 08:01:08,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:08,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:08,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:08,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:08,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:08,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 390 [2023-11-19 08:01:08,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 08:01:08,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:08,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 390 [2023-11-19 08:01:08,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:11,834 INFO L124 PetriNetUnfolderBase]: 28049/37311 cut-off events. [2023-11-19 08:01:11,834 INFO L125 PetriNetUnfolderBase]: For 3388/3388 co-relation queries the response was YES. [2023-11-19 08:01:11,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75141 conditions, 37311 events. 28049/37311 cut-off events. For 3388/3388 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 207658 event pairs, 23951 based on Foata normal form. 0/28310 useless extension candidates. Maximal degree in co-relation 75133. Up to 36259 conditions per place. [2023-11-19 08:01:12,105 INFO L140 encePairwiseOnDemand]: 388/390 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-19 08:01:12,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 178 flow [2023-11-19 08:01:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-11-19 08:01:12,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427350427350427 [2023-11-19 08:01:12,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-11-19 08:01:12,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-11-19 08:01:12,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:12,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-11-19 08:01:12,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:12,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 08:01:12,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 08:01:12,122 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 106 flow. Second operand 3 states and 518 transitions. [2023-11-19 08:01:12,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 178 flow [2023-11-19 08:01:12,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:01:12,170 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 105 flow [2023-11-19 08:01:12,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-11-19 08:01:12,170 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-11-19 08:01:12,171 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 105 flow [2023-11-19 08:01:12,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 08:01:12,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:12,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:01:12,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 08:01:12,172 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 08:01:12,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 43384583, now seen corresponding path program 1 times [2023-11-19 08:01:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042747013] [2023-11-19 08:01:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:12,266 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 08:01:12,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:12,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042747013] [2023-11-19 08:01:12,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042747013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:12,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:12,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:12,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040405217] [2023-11-19 08:01:12,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:12,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:12,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:12,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 390 [2023-11-19 08:01:12,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 08:01:12,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:12,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 390 [2023-11-19 08:01:12,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:15,146 INFO L124 PetriNetUnfolderBase]: 22735/29951 cut-off events. [2023-11-19 08:01:15,146 INFO L125 PetriNetUnfolderBase]: For 1834/1834 co-relation queries the response was YES. [2023-11-19 08:01:15,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60848 conditions, 29951 events. 22735/29951 cut-off events. For 1834/1834 co-relation queries the response was YES. Maximal size of possible extension queue 1310. Compared 166608 event pairs, 6369 based on Foata normal form. 0/24069 useless extension candidates. Maximal degree in co-relation 60840. Up to 24129 conditions per place. [2023-11-19 08:01:15,325 INFO L140 encePairwiseOnDemand]: 381/390 looper letters, 59 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2023-11-19 08:01:15,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 302 flow [2023-11-19 08:01:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-11-19 08:01:15,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683760683760684 [2023-11-19 08:01:15,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-11-19 08:01:15,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-11-19 08:01:15,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:15,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-11-19 08:01:15,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 08:01:15,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 08:01:15,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 08:01:15,337 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 105 flow. Second operand 3 states and 548 transitions. [2023-11-19 08:01:15,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 302 flow [2023-11-19 08:01:15,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:01:15,344 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 143 flow [2023-11-19 08:01:15,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-19 08:01:15,345 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-19 08:01:15,345 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 143 flow [2023-11-19 08:01:15,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 08:01:15,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:15,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:15,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 08:01:15,347 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 08:01:15,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash -762328114, now seen corresponding path program 1 times [2023-11-19 08:01:15,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:15,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514869099] [2023-11-19 08:01:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:15,405 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 08:01:15,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:15,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514869099] [2023-11-19 08:01:15,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514869099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:15,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:15,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:15,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353392488] [2023-11-19 08:01:15,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:15,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:15,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:15,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:15,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 390 [2023-11-19 08:01:15,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 08:01:15,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:15,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 390 [2023-11-19 08:01:15,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:17,849 INFO L124 PetriNetUnfolderBase]: 16381/21805 cut-off events. [2023-11-19 08:01:17,849 INFO L125 PetriNetUnfolderBase]: For 4926/4926 co-relation queries the response was YES. [2023-11-19 08:01:17,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47816 conditions, 21805 events. 16381/21805 cut-off events. For 4926/4926 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 113305 event pairs, 12859 based on Foata normal form. 1744/23275 useless extension candidates. Maximal degree in co-relation 47807. Up to 21199 conditions per place. [2023-11-19 08:01:17,959 INFO L140 encePairwiseOnDemand]: 385/390 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-19 08:01:17,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 201 flow [2023-11-19 08:01:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-11-19 08:01:17,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44188034188034186 [2023-11-19 08:01:17,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-11-19 08:01:17,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-11-19 08:01:17,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:17,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-11-19 08:01:17,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states 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 08:01:17,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 08:01:17,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 08:01:17,969 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 143 flow. Second operand 3 states and 517 transitions. [2023-11-19 08:01:17,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 201 flow [2023-11-19 08:01:17,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:01:17,981 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 124 flow [2023-11-19 08:01:17,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-19 08:01:17,982 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-11-19 08:01:17,982 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 124 flow [2023-11-19 08:01:17,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 08:01:17,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:17,983 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:17,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-19 08:01:17,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:01:17,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:17,984 INFO L85 PathProgramCache]: Analyzing trace with hash -448421873, now seen corresponding path program 1 times [2023-11-19 08:01:17,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:17,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113954641] [2023-11-19 08:01:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:17,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:17,999 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:18,015 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:18,015 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:01:18,016 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-19 08:01:18,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-19 08:01:18,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-19 08:01:18,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-19 08:01:18,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-11-19 08:01:18,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-19 08:01:18,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-19 08:01:18,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-19 08:01:18,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-19 08:01:18,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-19 08:01:18,018 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-19 08:01:18,018 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:01:18,019 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 08:01:18,062 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:18,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 236 transitions, 512 flow [2023-11-19 08:01:18,361 INFO L124 PetriNetUnfolderBase]: 21/324 cut-off events. [2023-11-19 08:01:18,361 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 08:01:18,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 324 events. 21/324 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1134 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 278. Up to 12 conditions per place. [2023-11-19 08:01:18,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 236 transitions, 512 flow [2023-11-19 08:01:18,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 236 transitions, 512 flow [2023-11-19 08:01:18,368 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:18,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 236 transitions, 512 flow [2023-11-19 08:01:18,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 236 transitions, 512 flow [2023-11-19 08:01:18,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 236 transitions, 512 flow [2023-11-19 08:01:18,427 INFO L124 PetriNetUnfolderBase]: 21/324 cut-off events. [2023-11-19 08:01:18,427 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 08:01:18,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 324 events. 21/324 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1134 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 278. Up to 12 conditions per place. [2023-11-19 08:01:18,447 INFO L119 LiptonReduction]: Number of co-enabled transitions 40400