./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/40_barrier_vf-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/40_barrier_vf-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya --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 828cbbb8bb1b7fb83d1c4d35071bdac7e1b4ae65dfc83ebb19446976ecd8d980 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:09:03,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:09:03,365 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 04:09:03,369 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:09:03,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:09:03,394 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:09:03,395 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:09:03,396 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:09:03,396 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:09:03,397 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:09:03,398 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:09:03,398 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:09:03,399 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:09:03,400 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:09:03,400 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:09:03,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:09:03,401 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:09:03,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:09:03,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:09:03,403 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:09:03,403 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 04:09:03,404 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 04:09:03,405 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 04:09:03,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:09:03,406 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:09:03,406 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 04:09:03,406 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:09:03,407 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:09:03,407 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:09:03,408 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:09:03,408 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:09:03,409 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:09:03,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:09:03,409 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:09:03,409 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:09:03,410 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:09:03,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:09:03,410 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:09:03,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:09:03,410 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:09:03,410 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:09:03,411 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_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 828cbbb8bb1b7fb83d1c4d35071bdac7e1b4ae65dfc83ebb19446976ecd8d980 [2023-11-29 04:09:03,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:09:03,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:09:03,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:09:03,637 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:09:03,638 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:09:03,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/40_barrier_vf-pthread.i [2023-11-29 04:09:06,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:09:06,572 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:09:06,573 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/sv-benchmarks/c/pthread-ext/40_barrier_vf-pthread.i [2023-11-29 04:09:06,588 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/data/c7e521f50/ba15d1c0f6fb4a13ad88c60efe4a8c01/FLAG0ab0e308e [2023-11-29 04:09:06,602 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/data/c7e521f50/ba15d1c0f6fb4a13ad88c60efe4a8c01 [2023-11-29 04:09:06,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:09:06,606 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:09:06,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:09:06,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:09:06,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:09:06,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:09:06" (1/1) ... [2023-11-29 04:09:06,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54e5802a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:06, skipping insertion in model container [2023-11-29 04:09:06,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:09:06" (1/1) ... [2023-11-29 04:09:06,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:09:06,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:09:06,955 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:09:06,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:09:07,026 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:09:07,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07 WrapperNode [2023-11-29 04:09:07,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:09:07,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:09:07,028 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:09:07,028 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:09:07,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,067 INFO L138 Inliner]: procedures = 165, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-29 04:09:07,068 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:09:07,068 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:09:07,068 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:09:07,069 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:09:07,077 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,080 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,094 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 10, 1]. 56 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 10, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2023-11-29 04:09:07,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,100 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,106 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,110 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:09:07,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:09:07,111 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:09:07,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:09:07,112 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (1/1) ... [2023-11-29 04:09:07,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:09:07,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:07,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:09:07,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc501b9-aefd-4c93-933d-a8c5c05ac8d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:09:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 04:09:07,186 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 04:09:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:09:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:09:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:09:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:09:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 04:09:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:09:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:09:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:09:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:09:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:09:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:09:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:09:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 04:09:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:09:07,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:09:07,190 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 04:09:07,314 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:09:07,316 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:09:07,456 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:09:07,607 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:09:07,608 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:09:07,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:09:07 BoogieIcfgContainer [2023-11-29 04:09:07,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:09:07,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:09:07,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:09:07,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:09:07,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:09:06" (1/3) ... [2023-11-29 04:09:07,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51222fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:09:07, skipping insertion in model container [2023-11-29 04:09:07,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:09:07" (2/3) ... [2023-11-29 04:09:07,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51222fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:09:07, skipping insertion in model container [2023-11-29 04:09:07,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:09:07" (3/3) ... [2023-11-29 04:09:07,617 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf-pthread.i [2023-11-29 04:09:07,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:09:07,636 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-29 04:09:07,636 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:09:07,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 04:09:07,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 31 transitions, 66 flow [2023-11-29 04:09:07,721 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2023-11-29 04:09:07,722 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:09:07,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 4/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 71 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2023-11-29 04:09:07,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 31 transitions, 66 flow [2023-11-29 04:09:07,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 66 flow [2023-11-29 04:09:07,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:09:07,745 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;@1cbcf39e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:09:07,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-29 04:09:07,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:09:07,750 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 04:09:07,751 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:09:07,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:07,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:09:07,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-29 04:09:07,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash 238237, now seen corresponding path program 1 times [2023-11-29 04:09:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426070900] [2023-11-29 04:09:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:08,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:08,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426070900] [2023-11-29 04:09:08,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426070900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:08,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:08,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:09:08,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645100707] [2023-11-29 04:09:08,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:08,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:08,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:08,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:08,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:08,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2023-11-29 04:09:08,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:08,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2023-11-29 04:09:08,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:08,144 INFO L124 PetriNetUnfolderBase]: 32/94 cut-off events. [2023-11-29 04:09:08,144 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:09:08,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 94 events. 32/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 258 event pairs, 24 based on Foata normal form. 12/106 useless extension candidates. Maximal degree in co-relation 155. Up to 71 conditions per place. [2023-11-29 04:09:08,147 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 14 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-29 04:09:08,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 78 flow [2023-11-29 04:09:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2023-11-29 04:09:08,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2023-11-29 04:09:08,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2023-11-29 04:09:08,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2023-11-29 04:09:08,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:08,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2023-11-29 04:09:08,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,169 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 66 flow. Second operand 3 states and 44 transitions. [2023-11-29 04:09:08,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 78 flow [2023-11-29 04:09:08,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 04:09:08,174 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 50 flow [2023-11-29 04:09:08,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-11-29 04:09:08,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-11-29 04:09:08,179 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 50 flow [2023-11-29 04:09:08,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:08,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:09:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:09:08,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-29 04:09:08,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash 238238, now seen corresponding path program 1 times [2023-11-29 04:09:08,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:08,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340324610] [2023-11-29 04:09:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:08,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:08,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340324610] [2023-11-29 04:09:08,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340324610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:08,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:08,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:09:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512071358] [2023-11-29 04:09:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:08,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2023-11-29 04:09:08,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:08,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2023-11-29 04:09:08,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:08,348 INFO L124 PetriNetUnfolderBase]: 22/69 cut-off events. [2023-11-29 04:09:08,348 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 04:09:08,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 69 events. 22/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 164 event pairs, 16 based on Foata normal form. 10/79 useless extension candidates. Maximal degree in co-relation 120. Up to 51 conditions per place. [2023-11-29 04:09:08,350 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 13 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-29 04:09:08,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 76 flow [2023-11-29 04:09:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-29 04:09:08,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-11-29 04:09:08,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-29 04:09:08,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-29 04:09:08,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:08,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-29 04:09:08,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,354 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 50 flow. Second operand 3 states and 42 transitions. [2023-11-29 04:09:08,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 76 flow [2023-11-29 04:09:08,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:08,356 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 49 flow [2023-11-29 04:09:08,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-29 04:09:08,357 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-11-29 04:09:08,357 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 49 flow [2023-11-29 04:09:08,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:08,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 04:09:08,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:09:08,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-29 04:09:08,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 308589829, now seen corresponding path program 1 times [2023-11-29 04:09:08,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:08,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537393250] [2023-11-29 04:09:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:09:08,383 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 04:09:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:09:08,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 04:09:08,418 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 04:09:08,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-29 04:09:08,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-29 04:09:08,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-29 04:09:08,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-29 04:09:08,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-29 04:09:08,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-29 04:09:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:09:08,427 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 04:09:08,430 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 04:09:08,431 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 04:09:08,455 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 04:09:08,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 52 transitions, 114 flow [2023-11-29 04:09:08,473 INFO L124 PetriNetUnfolderBase]: 8/67 cut-off events. [2023-11-29 04:09:08,473 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:09:08,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 67 events. 8/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 183 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 48. Up to 3 conditions per place. [2023-11-29 04:09:08,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 52 transitions, 114 flow [2023-11-29 04:09:08,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 52 transitions, 114 flow [2023-11-29 04:09:08,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:09:08,479 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;@1cbcf39e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:09:08,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-29 04:09:08,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:09:08,483 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 04:09:08,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:09:08,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:08,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:09:08,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 04:09:08,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash 289873, now seen corresponding path program 1 times [2023-11-29 04:09:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:08,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216589809] [2023-11-29 04:09:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:08,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:08,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216589809] [2023-11-29 04:09:08,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216589809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:08,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:08,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:09:08,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107468693] [2023-11-29 04:09:08,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:08,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:08,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:08,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:08,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2023-11-29 04:09:08,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:08,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2023-11-29 04:09:08,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:08,801 INFO L124 PetriNetUnfolderBase]: 809/1500 cut-off events. [2023-11-29 04:09:08,802 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 04:09:08,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2749 conditions, 1500 events. 809/1500 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7811 event pairs, 597 based on Foata normal form. 228/1712 useless extension candidates. Maximal degree in co-relation 1015. Up to 1216 conditions per place. [2023-11-29 04:09:08,818 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 25 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-29 04:09:08,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 138 flow [2023-11-29 04:09:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2023-11-29 04:09:08,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2023-11-29 04:09:08,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2023-11-29 04:09:08,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2023-11-29 04:09:08,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:08,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2023-11-29 04:09:08,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,823 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 114 flow. Second operand 3 states and 73 transitions. [2023-11-29 04:09:08,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 138 flow [2023-11-29 04:09:08,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 04:09:08,826 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 88 flow [2023-11-29 04:09:08,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-11-29 04:09:08,827 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-11-29 04:09:08,827 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 88 flow [2023-11-29 04:09:08,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:08,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:09:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:09:08,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 04:09:08,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash 289874, now seen corresponding path program 1 times [2023-11-29 04:09:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627136256] [2023-11-29 04:09:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:08,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627136256] [2023-11-29 04:09:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627136256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:08,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:08,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:09:08,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579522368] [2023-11-29 04:09:08,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:08,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2023-11-29 04:09:08,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:08,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:08,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2023-11-29 04:09:08,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:09,069 INFO L124 PetriNetUnfolderBase]: 576/1089 cut-off events. [2023-11-29 04:09:09,070 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-29 04:09:09,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 1089 events. 576/1089 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5348 event pairs, 420 based on Foata normal form. 101/1178 useless extension candidates. Maximal degree in co-relation 1994. Up to 878 conditions per place. [2023-11-29 04:09:09,079 INFO L140 encePairwiseOnDemand]: 50/52 looper letters, 24 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-29 04:09:09,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 136 flow [2023-11-29 04:09:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-29 04:09:09,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2023-11-29 04:09:09,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-29 04:09:09,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-29 04:09:09,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:09,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-29 04:09:09,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:09,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:09,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:09,085 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 88 flow. Second operand 3 states and 68 transitions. [2023-11-29 04:09:09,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 136 flow [2023-11-29 04:09:09,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:09,087 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 87 flow [2023-11-29 04:09:09,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-29 04:09:09,089 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-11-29 04:09:09,089 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 87 flow [2023-11-29 04:09:09,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:09,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:09,089 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 04:09:09,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 04:09:09,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 04:09:09,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1916617478, now seen corresponding path program 1 times [2023-11-29 04:09:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:09,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746693479] [2023-11-29 04:09:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:09:09,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 04:09:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:09:09,129 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 04:09:09,130 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 04:09:09,130 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-29 04:09:09,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-29 04:09:09,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-29 04:09:09,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-29 04:09:09,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-29 04:09:09,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-29 04:09:09,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-29 04:09:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 04:09:09,132 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 04:09:09,133 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 04:09:09,133 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 04:09:09,161 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 04:09:09,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 73 transitions, 164 flow [2023-11-29 04:09:09,178 INFO L124 PetriNetUnfolderBase]: 12/96 cut-off events. [2023-11-29 04:09:09,178 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 04:09:09,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 12/96 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 301 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-11-29 04:09:09,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 73 transitions, 164 flow [2023-11-29 04:09:09,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 73 transitions, 164 flow [2023-11-29 04:09:09,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:09:09,183 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;@1cbcf39e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:09:09,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-29 04:09:09,185 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:09:09,185 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 04:09:09,185 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:09:09,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:09,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:09:09,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 04:09:09,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:09,186 INFO L85 PathProgramCache]: Analyzing trace with hash 362362, now seen corresponding path program 1 times [2023-11-29 04:09:09,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:09,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783463282] [2023-11-29 04:09:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:09,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:09,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:09,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783463282] [2023-11-29 04:09:09,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783463282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:09,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:09,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:09:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201925303] [2023-11-29 04:09:09,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:09,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:09,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:09,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2023-11-29 04:09:09,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:09,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:09,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2023-11-29 04:09:09,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:11,277 INFO L124 PetriNetUnfolderBase]: 12997/19998 cut-off events. [2023-11-29 04:09:11,277 INFO L125 PetriNetUnfolderBase]: For 695/695 co-relation queries the response was YES. [2023-11-29 04:09:11,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37484 conditions, 19998 events. 12997/19998 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 130117 event pairs, 9641 based on Foata normal form. 3485/23314 useless extension candidates. Maximal degree in co-relation 2899. Up to 17084 conditions per place. [2023-11-29 04:09:11,399 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 36 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-29 04:09:11,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 200 flow [2023-11-29 04:09:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-11-29 04:09:11,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657534246575342 [2023-11-29 04:09:11,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-11-29 04:09:11,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-11-29 04:09:11,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:11,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-11-29 04:09:11,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,405 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 164 flow. Second operand 3 states and 102 transitions. [2023-11-29 04:09:11,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 200 flow [2023-11-29 04:09:11,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 198 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 04:09:11,409 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 126 flow [2023-11-29 04:09:11,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2023-11-29 04:09:11,410 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -11 predicate places. [2023-11-29 04:09:11,410 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 126 flow [2023-11-29 04:09:11,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:11,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:09:11,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 04:09:11,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 04:09:11,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:11,412 INFO L85 PathProgramCache]: Analyzing trace with hash 362363, now seen corresponding path program 1 times [2023-11-29 04:09:11,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:11,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791522296] [2023-11-29 04:09:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:11,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:11,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:11,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791522296] [2023-11-29 04:09:11,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791522296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:11,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:11,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:09:11,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826586304] [2023-11-29 04:09:11,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:11,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:11,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:11,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 73 [2023-11-29 04:09:11,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:11,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 73 [2023-11-29 04:09:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:12,498 INFO L124 PetriNetUnfolderBase]: 9407/14623 cut-off events. [2023-11-29 04:09:12,498 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2023-11-29 04:09:12,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27374 conditions, 14623 events. 9407/14623 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 91982 event pairs, 6923 based on Foata normal form. 1012/15491 useless extension candidates. Maximal degree in co-relation 27365. Up to 12442 conditions per place. [2023-11-29 04:09:12,568 INFO L140 encePairwiseOnDemand]: 71/73 looper letters, 35 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-29 04:09:12,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 196 flow [2023-11-29 04:09:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2023-11-29 04:09:12,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292237442922374 [2023-11-29 04:09:12,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2023-11-29 04:09:12,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2023-11-29 04:09:12,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:12,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2023-11-29 04:09:12,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:12,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:12,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:12,574 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 126 flow. Second operand 3 states and 94 transitions. [2023-11-29 04:09:12,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 196 flow [2023-11-29 04:09:12,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:12,576 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 125 flow [2023-11-29 04:09:12,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-11-29 04:09:12,577 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -11 predicate places. [2023-11-29 04:09:12,577 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 125 flow [2023-11-29 04:09:12,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:12,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:12,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:12,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 04:09:12,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 04:09:12,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash 491999929, now seen corresponding path program 1 times [2023-11-29 04:09:12,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:12,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444921329] [2023-11-29 04:09:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:12,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:12,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:12,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444921329] [2023-11-29 04:09:12,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444921329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:12,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:12,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:09:12,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086243034] [2023-11-29 04:09:12,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:12,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:09:12,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:09:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:09:12,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2023-11-29 04:09:12,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:12,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:12,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2023-11-29 04:09:12,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:14,394 INFO L124 PetriNetUnfolderBase]: 16074/26711 cut-off events. [2023-11-29 04:09:14,394 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2023-11-29 04:09:14,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48746 conditions, 26711 events. 16074/26711 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 1300. Compared 212946 event pairs, 4333 based on Foata normal form. 867/27419 useless extension candidates. Maximal degree in co-relation 48736. Up to 8833 conditions per place. [2023-11-29 04:09:14,519 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 87 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2023-11-29 04:09:14,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 114 transitions, 456 flow [2023-11-29 04:09:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:09:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:09:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2023-11-29 04:09:14,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6267123287671232 [2023-11-29 04:09:14,521 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 183 transitions. [2023-11-29 04:09:14,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 183 transitions. [2023-11-29 04:09:14,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:14,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 183 transitions. [2023-11-29 04:09:14,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.75) internal successors, (183), 4 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) [2023-11-29 04:09:14,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:14,525 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:14,526 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 125 flow. Second operand 4 states and 183 transitions. [2023-11-29 04:09:14,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 114 transitions, 456 flow [2023-11-29 04:09:14,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 114 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:14,530 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 162 flow [2023-11-29 04:09:14,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-11-29 04:09:14,531 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2023-11-29 04:09:14,531 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 162 flow [2023-11-29 04:09:14,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:14,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:14,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:14,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 04:09:14,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 04:09:14,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:14,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1449023134, now seen corresponding path program 1 times [2023-11-29 04:09:14,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:14,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132270938] [2023-11-29 04:09:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:14,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:14,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132270938] [2023-11-29 04:09:14,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132270938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:14,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:14,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:09:14,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513288468] [2023-11-29 04:09:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:14,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:14,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:14,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2023-11-29 04:09:14,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:14,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:14,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2023-11-29 04:09:14,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:15,802 INFO L124 PetriNetUnfolderBase]: 9562/16188 cut-off events. [2023-11-29 04:09:15,802 INFO L125 PetriNetUnfolderBase]: For 853/853 co-relation queries the response was YES. [2023-11-29 04:09:15,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30548 conditions, 16188 events. 9562/16188 cut-off events. For 853/853 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 123759 event pairs, 3286 based on Foata normal form. 672/16770 useless extension candidates. Maximal degree in co-relation 30537. Up to 9544 conditions per place. [2023-11-29 04:09:15,918 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 59 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-11-29 04:09:15,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 341 flow [2023-11-29 04:09:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2023-11-29 04:09:15,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2023-11-29 04:09:15,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2023-11-29 04:09:15,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2023-11-29 04:09:15,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:15,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2023-11-29 04:09:15,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:15,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:15,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:15,924 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 162 flow. Second operand 3 states and 120 transitions. [2023-11-29 04:09:15,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 341 flow [2023-11-29 04:09:15,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 341 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 04:09:15,928 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 180 flow [2023-11-29 04:09:15,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-29 04:09:15,929 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2023-11-29 04:09:15,929 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 180 flow [2023-11-29 04:09:15,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:15,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:15,930 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-29 04:09:15,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 04:09:15,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 04:09:15,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1480234216, now seen corresponding path program 1 times [2023-11-29 04:09:15,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:15,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722304342] [2023-11-29 04:09:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:15,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:09:15,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 04:09:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:09:15,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 04:09:15,971 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 04:09:15,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-29 04:09:15,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-29 04:09:15,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-29 04:09:15,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-29 04:09:15,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-29 04:09:15,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-29 04:09:15,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-29 04:09:15,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-29 04:09:15,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 04:09:15,973 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-29 04:09:15,974 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 04:09:15,974 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 04:09:16,005 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 04:09:16,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 94 transitions, 216 flow [2023-11-29 04:09:16,023 INFO L124 PetriNetUnfolderBase]: 16/125 cut-off events. [2023-11-29 04:09:16,023 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 04:09:16,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 125 events. 16/125 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 401 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 108. Up to 5 conditions per place. [2023-11-29 04:09:16,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 94 transitions, 216 flow [2023-11-29 04:09:16,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 94 transitions, 216 flow [2023-11-29 04:09:16,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:09:16,028 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;@1cbcf39e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:09:16,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-29 04:09:16,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:09:16,030 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 04:09:16,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:09:16,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:16,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:09:16,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 04:09:16,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 455704, now seen corresponding path program 1 times [2023-11-29 04:09:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:16,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759882371] [2023-11-29 04:09:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:16,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:16,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759882371] [2023-11-29 04:09:16,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759882371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:16,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:16,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:09:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164002373] [2023-11-29 04:09:16,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:16,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:16,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 94 [2023-11-29 04:09:16,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 94 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:16,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:16,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 94 [2023-11-29 04:09:16,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:33,442 INFO L124 PetriNetUnfolderBase]: 179037/249132 cut-off events. [2023-11-29 04:09:33,442 INFO L125 PetriNetUnfolderBase]: For 12282/12282 co-relation queries the response was YES. [2023-11-29 04:09:33,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474059 conditions, 249132 events. 179037/249132 cut-off events. For 12282/12282 co-relation queries the response was YES. Maximal size of possible extension queue 6733. Compared 1818083 event pairs, 133201 based on Foata normal form. 47095/294528 useless extension candidates. Maximal degree in co-relation 37580. Up to 219924 conditions per place. [2023-11-29 04:09:34,953 INFO L140 encePairwiseOnDemand]: 79/94 looper letters, 47 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-11-29 04:09:34,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 264 flow [2023-11-29 04:09:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-29 04:09:34,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645390070921986 [2023-11-29 04:09:34,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-29 04:09:34,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-29 04:09:34,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:34,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-29 04:09:34,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:34,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:34,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:34,958 INFO L175 Difference]: Start difference. First operand has 87 places, 94 transitions, 216 flow. Second operand 3 states and 131 transitions. [2023-11-29 04:09:34,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 264 flow [2023-11-29 04:09:34,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 258 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-29 04:09:34,968 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 164 flow [2023-11-29 04:09:34,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-11-29 04:09:34,969 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -14 predicate places. [2023-11-29 04:09:34,970 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 164 flow [2023-11-29 04:09:34,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:34,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:34,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:09:34,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 04:09:34,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 04:09:34,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:34,971 INFO L85 PathProgramCache]: Analyzing trace with hash 455705, now seen corresponding path program 1 times [2023-11-29 04:09:34,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:34,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807602274] [2023-11-29 04:09:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:35,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807602274] [2023-11-29 04:09:35,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807602274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:35,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:35,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:09:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999895717] [2023-11-29 04:09:35,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:35,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:09:35,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:09:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:09:35,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 94 [2023-11-29 04:09:35,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:35,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:35,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 94 [2023-11-29 04:09:35,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:09:46,505 INFO L124 PetriNetUnfolderBase]: 130531/182769 cut-off events. [2023-11-29 04:09:46,505 INFO L125 PetriNetUnfolderBase]: For 3040/3040 co-relation queries the response was YES. [2023-11-29 04:09:46,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346711 conditions, 182769 events. 130531/182769 cut-off events. For 3040/3040 co-relation queries the response was YES. Maximal size of possible extension queue 5022. Compared 1304899 event pairs, 96559 based on Foata normal form. 10123/191416 useless extension candidates. Maximal degree in co-relation 346701. Up to 160899 conditions per place. [2023-11-29 04:09:47,573 INFO L140 encePairwiseOnDemand]: 92/94 looper letters, 46 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-11-29 04:09:47,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 256 flow [2023-11-29 04:09:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:09:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:09:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2023-11-29 04:09:47,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425531914893617 [2023-11-29 04:09:47,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2023-11-29 04:09:47,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2023-11-29 04:09:47,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:09:47,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2023-11-29 04:09:47,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:47,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:47,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:47,577 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 164 flow. Second operand 3 states and 120 transitions. [2023-11-29 04:09:47,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 256 flow [2023-11-29 04:09:47,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:09:47,580 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 163 flow [2023-11-29 04:09:47,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-11-29 04:09:47,581 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -14 predicate places. [2023-11-29 04:09:47,581 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 163 flow [2023-11-29 04:09:47,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:47,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:09:47,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:09:47,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 04:09:47,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 04:09:47,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1717389033, now seen corresponding path program 1 times [2023-11-29 04:09:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:47,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668222436] [2023-11-29 04:09:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:47,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:47,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668222436] [2023-11-29 04:09:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668222436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:09:47,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:09:47,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:09:47,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321659443] [2023-11-29 04:09:47,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:09:47,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:09:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:47,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:09:47,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:09:47,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 94 [2023-11-29 04:09:47,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:47,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:09:47,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 94 [2023-11-29 04:09:47,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:14,304 INFO L124 PetriNetUnfolderBase]: 276312/405716 cut-off events. [2023-11-29 04:10:14,304 INFO L125 PetriNetUnfolderBase]: For 5566/5566 co-relation queries the response was YES. [2023-11-29 04:10:15,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756696 conditions, 405716 events. 276312/405716 cut-off events. For 5566/5566 co-relation queries the response was YES. Maximal size of possible extension queue 15567. Compared 3625088 event pairs, 84700 based on Foata normal form. 15825/419354 useless extension candidates. Maximal degree in co-relation 756685. Up to 130816 conditions per place. [2023-11-29 04:10:16,812 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 115 selfloop transitions, 13 changer transitions 0/150 dead transitions. [2023-11-29 04:10:16,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 150 transitions, 606 flow [2023-11-29 04:10:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:10:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:10:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2023-11-29 04:10:16,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2023-11-29 04:10:16,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 236 transitions. [2023-11-29 04:10:16,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 236 transitions. [2023-11-29 04:10:16,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:10:16,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 236 transitions. [2023-11-29 04:10:16,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:16,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:16,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:16,818 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 163 flow. Second operand 4 states and 236 transitions. [2023-11-29 04:10:16,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 150 transitions, 606 flow [2023-11-29 04:10:16,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 150 transitions, 605 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:10:16,825 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 212 flow [2023-11-29 04:10:16,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2023-11-29 04:10:16,826 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -12 predicate places. [2023-11-29 04:10:16,826 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 212 flow [2023-11-29 04:10:16,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:16,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:16,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:16,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 04:10:16,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 04:10:16,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1677442162, now seen corresponding path program 1 times [2023-11-29 04:10:16,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:16,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238484291] [2023-11-29 04:10:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:16,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:16,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:16,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238484291] [2023-11-29 04:10:16,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238484291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:10:16,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:10:16,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:10:16,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828149439] [2023-11-29 04:10:16,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:10:16,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:10:16,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:10:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:10:16,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 94 [2023-11-29 04:10:16,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:16,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:16,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 94 [2023-11-29 04:10:16,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:10:36,989 INFO L124 PetriNetUnfolderBase]: 196431/295532 cut-off events. [2023-11-29 04:10:36,989 INFO L125 PetriNetUnfolderBase]: For 17284/17284 co-relation queries the response was YES. [2023-11-29 04:10:37,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566404 conditions, 295532 events. 196431/295532 cut-off events. For 17284/17284 co-relation queries the response was YES. Maximal size of possible extension queue 11004. Compared 2686919 event pairs, 60081 based on Foata normal form. 6642/300083 useless extension candidates. Maximal degree in co-relation 566392. Up to 215698 conditions per place. [2023-11-29 04:10:38,916 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 86 selfloop transitions, 5 changer transitions 0/113 dead transitions. [2023-11-29 04:10:38,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 500 flow [2023-11-29 04:10:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:10:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:10:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-29 04:10:38,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2023-11-29 04:10:38,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-29 04:10:38,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-29 04:10:38,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:10:38,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-29 04:10:38,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:38,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:38,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:38,919 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 212 flow. Second operand 3 states and 158 transitions. [2023-11-29 04:10:38,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 500 flow [2023-11-29 04:10:38,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 04:10:38,924 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 259 flow [2023-11-29 04:10:38,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2023-11-29 04:10:38,925 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -9 predicate places. [2023-11-29 04:10:38,925 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 259 flow [2023-11-29 04:10:38,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:38,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:38,925 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 04:10:38,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 04:10:38,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 04:10:38,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:38,926 INFO L85 PathProgramCache]: Analyzing trace with hash 923693215, now seen corresponding path program 1 times [2023-11-29 04:10:38,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:38,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274844245] [2023-11-29 04:10:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:38,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:10:38,946 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 04:10:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:10:38,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 04:10:38,964 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 04:10:38,965 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-29 04:10:38,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-29 04:10:38,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-29 04:10:38,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-29 04:10:38,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-11-29 04:10:38,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-29 04:10:38,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-29 04:10:38,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-29 04:10:38,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-29 04:10:38,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 04:10:38,967 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-29 04:10:38,967 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 04:10:38,968 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-29 04:10:38,998 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 04:10:39,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 270 flow [2023-11-29 04:10:39,016 INFO L124 PetriNetUnfolderBase]: 20/154 cut-off events. [2023-11-29 04:10:39,016 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 04:10:39,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 154 events. 20/154 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 518 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-11-29 04:10:39,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 270 flow [2023-11-29 04:10:39,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 115 transitions, 270 flow [2023-11-29 04:10:39,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:10:39,020 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;@1cbcf39e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:10:39,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-29 04:10:39,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:10:39,022 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 04:10:39,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 04:10:39,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:10:39,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 04:10:39,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 04:10:39,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash 569899, now seen corresponding path program 1 times [2023-11-29 04:10:39,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:39,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407863794] [2023-11-29 04:10:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:39,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:10:39,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:39,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407863794] [2023-11-29 04:10:39,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407863794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:10:39,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:10:39,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:10:39,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938900271] [2023-11-29 04:10:39,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:10:39,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:10:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:39,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:10:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:10:39,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 115 [2023-11-29 04:10:39,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 115 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:39,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:10:39,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 115 [2023-11-29 04:10:39,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand