./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/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_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/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_c06c1df2-773f-4def-8517-4de07bbea133/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 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:50:59,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:50:59,705 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 06:50:59,709 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:50:59,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:50:59,734 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:50:59,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:50:59,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:50:59,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:50:59,736 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:50:59,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:50:59,737 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:50:59,738 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:50:59,738 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:50:59,739 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:50:59,739 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:50:59,740 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:50:59,740 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:50:59,741 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:50:59,741 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:50:59,742 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:50:59,743 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:50:59,743 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:50:59,743 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:50:59,744 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:50:59,744 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:50:59,745 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:50:59,745 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:50:59,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:50:59,746 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:50:59,746 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:50:59,747 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:50:59,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:50:59,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:50:59,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:50:59,748 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:50:59,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:50:59,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:50:59,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:50:59,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:50:59,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:50:59,750 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_c06c1df2-773f-4def-8517-4de07bbea133/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd [2023-11-29 06:50:59,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:50:59,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:50:59,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:50:59,997 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:50:59,998 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:50:59,999 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-29 06:51:02,683 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:51:02,893 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:51:02,893 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs-pthread.i [2023-11-29 06:51:02,909 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/data/118d0ceea/e0304dfd986f4aecb7cc95f96e5df008/FLAG5902a75f7 [2023-11-29 06:51:02,920 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/data/118d0ceea/e0304dfd986f4aecb7cc95f96e5df008 [2023-11-29 06:51:02,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:51:02,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:51:02,925 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:51:02,925 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:51:02,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:51:02,930 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:51:02" (1/1) ... [2023-11-29 06:51:02,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b532be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:02, skipping insertion in model container [2023-11-29 06:51:02,931 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:51:02" (1/1) ... [2023-11-29 06:51:02,976 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:51:03,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:51:03,252 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:51:03,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:51:03,322 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:51:03,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03 WrapperNode [2023-11-29 06:51:03,322 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:51:03,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:51:03,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:51:03,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:51:03,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,343 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,361 INFO L138 Inliner]: procedures = 163, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-11-29 06:51:03,361 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:51:03,362 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:51:03,362 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:51:03,362 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:51:03,371 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,375 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,390 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-11-29 06:51:03,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,397 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,401 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,403 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:51:03,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:51:03,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:51:03,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:51:03,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (1/1) ... [2023-11-29 06:51:03,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:51:03,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:51:03,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:51:03,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:51:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-29 06:51:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-29 06:51:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 06:51:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 06:51:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:51:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:51:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:51:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 06:51:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:51:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:51:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:51:03,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:51:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:51:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:51:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 06:51:03,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:51:03,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:51:03,482 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 06:51:03,608 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:51:03,610 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:51:03,758 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:51:03,854 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:51:03,854 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:51:03,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:51:03 BoogieIcfgContainer [2023-11-29 06:51:03,855 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:51:03,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:51:03,858 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:51:03,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:51:03,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:51:02" (1/3) ... [2023-11-29 06:51:03,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71161788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:51:03, skipping insertion in model container [2023-11-29 06:51:03,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:03" (2/3) ... [2023-11-29 06:51:03,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71161788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:51:03, skipping insertion in model container [2023-11-29 06:51:03,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:51:03" (3/3) ... [2023-11-29 06:51:03,865 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2023-11-29 06:51:03,905 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:51:03,905 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-29 06:51:03,906 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:51:03,954 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 06:51:03,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 38 transitions, 84 flow [2023-11-29 06:51:04,014 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2023-11-29 06:51:04,014 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:51:04,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 44 events. 4/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 119 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-11-29 06:51:04,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 38 transitions, 84 flow [2023-11-29 06:51:04,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 37 transitions, 81 flow [2023-11-29 06:51:04,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:51:04,038 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;@2e87a35b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:51:04,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-29 06:51:04,042 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:51:04,042 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 06:51:04,042 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:51:04,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:04,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:04,044 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 06:51:04,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash 7580, now seen corresponding path program 1 times [2023-11-29 06:51:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:04,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525396205] [2023-11-29 06:51:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:04,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:04,285 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 06:51:04,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:04,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525396205] [2023-11-29 06:51:04,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525396205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:04,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:04,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731574707] [2023-11-29 06:51:04,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:04,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:04,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:04,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2023-11-29 06:51:04,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 06:51:04,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:04,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2023-11-29 06:51:04,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:04,444 INFO L124 PetriNetUnfolderBase]: 110/251 cut-off events. [2023-11-29 06:51:04,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:51:04,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 251 events. 110/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1204 event pairs, 93 based on Foata normal form. 86/324 useless extension candidates. Maximal degree in co-relation 439. Up to 187 conditions per place. [2023-11-29 06:51:04,451 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 13 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-29 06:51:04,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 89 flow [2023-11-29 06:51:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2023-11-29 06:51:04,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-29 06:51:04,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2023-11-29 06:51:04,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2023-11-29 06:51:04,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:04,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2023-11-29 06:51:04,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 06:51:04,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 06:51:04,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 06:51:04,473 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 81 flow. Second operand 3 states and 66 transitions. [2023-11-29 06:51:04,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 89 flow [2023-11-29 06:51:04,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:04,477 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 62 flow [2023-11-29 06:51:04,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-29 06:51:04,481 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-11-29 06:51:04,482 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 62 flow [2023-11-29 06:51:04,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 06:51:04,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:04,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:04,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:51:04,483 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 06:51:04,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:04,484 INFO L85 PathProgramCache]: Analyzing trace with hash 7581, now seen corresponding path program 1 times [2023-11-29 06:51:04,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:04,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445946945] [2023-11-29 06:51:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:04,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:04,589 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 06:51:04,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445946945] [2023-11-29 06:51:04,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445946945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:04,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:04,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:04,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535099146] [2023-11-29 06:51:04,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:04,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:04,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:04,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:04,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2023-11-29 06:51:04,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 06:51:04,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:04,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2023-11-29 06:51:04,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:04,657 INFO L124 PetriNetUnfolderBase]: 79/191 cut-off events. [2023-11-29 06:51:04,658 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 06:51:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 191 events. 79/191 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 847 event pairs, 66 based on Foata normal form. 21/199 useless extension candidates. Maximal degree in co-relation 334. Up to 135 conditions per place. [2023-11-29 06:51:04,661 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 11 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-29 06:51:04,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 82 flow [2023-11-29 06:51:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 06:51:04,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2023-11-29 06:51:04,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 06:51:04,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 06:51:04,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:04,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 06:51:04,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 06:51:04,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 06:51:04,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 06:51:04,666 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 62 flow. Second operand 3 states and 65 transitions. [2023-11-29 06:51:04,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 82 flow [2023-11-29 06:51:04,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 81 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:04,668 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 59 flow [2023-11-29 06:51:04,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-11-29 06:51:04,669 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-11-29 06:51:04,669 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 59 flow [2023-11-29 06:51:04,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 06:51:04,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:04,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:04,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:51:04,670 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 06:51:04,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:04,671 INFO L85 PathProgramCache]: Analyzing trace with hash -166314893, now seen corresponding path program 1 times [2023-11-29 06:51:04,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:04,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140291131] [2023-11-29 06:51:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:04,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:04,736 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 06:51:04,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:04,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140291131] [2023-11-29 06:51:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140291131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:04,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:04,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:51:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863973779] [2023-11-29 06:51:04,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:04,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:04,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:04,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:04,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 38 [2023-11-29 06:51:04,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 06:51:04,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:04,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 38 [2023-11-29 06:51:04,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:04,823 INFO L124 PetriNetUnfolderBase]: 158/359 cut-off events. [2023-11-29 06:51:04,824 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 06:51:04,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 359 events. 158/359 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1659 event pairs, 50 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 624. Up to 134 conditions per place. [2023-11-29 06:51:04,828 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 18 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-29 06:51:04,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 117 flow [2023-11-29 06:51:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-29 06:51:04,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 06:51:04,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-29 06:51:04,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-29 06:51:04,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:04,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-29 06:51:04,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 06:51:04,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 06:51:04,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 06:51:04,832 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 59 flow. Second operand 3 states and 76 transitions. [2023-11-29 06:51:04,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 117 flow [2023-11-29 06:51:04,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:04,834 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 80 flow [2023-11-29 06:51:04,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-29 06:51:04,835 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-11-29 06:51:04,836 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 80 flow [2023-11-29 06:51:04,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 06:51:04,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:04,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:04,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:51:04,837 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 06:51:04,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:04,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1638286471, now seen corresponding path program 1 times [2023-11-29 06:51:04,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:04,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204647374] [2023-11-29 06:51:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:04,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:51:04,858 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:51:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:51:04,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:51:04,891 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:51:04,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-29 06:51:04,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-29 06:51:04,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-29 06:51:04,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-29 06:51:04,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-29 06:51:04,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2023-11-29 06:51:04,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-29 06:51:04,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2023-11-29 06:51:04,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-29 06:51:04,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:51:04,896 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 06:51:04,899 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 06:51:04,899 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 06:51:04,923 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 06:51:04,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 142 flow [2023-11-29 06:51:04,934 INFO L124 PetriNetUnfolderBase]: 5/60 cut-off events. [2023-11-29 06:51:04,934 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:51:04,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 60 events. 5/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 173 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 67. Up to 3 conditions per place. [2023-11-29 06:51:04,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 142 flow [2023-11-29 06:51:04,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 45 transitions, 103 flow [2023-11-29 06:51:04,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:51:04,938 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;@2e87a35b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:51:04,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-29 06:51:04,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:51:04,940 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 06:51:04,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:51:04,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:04,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:04,940 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 06:51:04,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash 9532, now seen corresponding path program 1 times [2023-11-29 06:51:04,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:04,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184960548] [2023-11-29 06:51:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:04,969 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 06:51:04,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:04,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184960548] [2023-11-29 06:51:04,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184960548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:04,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:04,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:04,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713249678] [2023-11-29 06:51:04,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:04,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:04,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:04,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:04,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 61 [2023-11-29 06:51:04,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 06:51:04,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:04,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 61 [2023-11-29 06:51:04,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:05,179 INFO L124 PetriNetUnfolderBase]: 766/1379 cut-off events. [2023-11-29 06:51:05,180 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-29 06:51:05,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 1379 events. 766/1379 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8007 event pairs, 621 based on Foata normal form. 511/1834 useless extension candidates. Maximal degree in co-relation 2519. Up to 1091 conditions per place. [2023-11-29 06:51:05,195 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 17 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-29 06:51:05,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 117 flow [2023-11-29 06:51:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2023-11-29 06:51:05,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5519125683060109 [2023-11-29 06:51:05,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 101 transitions. [2023-11-29 06:51:05,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 101 transitions. [2023-11-29 06:51:05,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:05,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 101 transitions. [2023-11-29 06:51:05,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:05,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:05,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:05,200 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 103 flow. Second operand 3 states and 101 transitions. [2023-11-29 06:51:05,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 117 flow [2023-11-29 06:51:05,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:05,202 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 82 flow [2023-11-29 06:51:05,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-29 06:51:05,204 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-11-29 06:51:05,204 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 82 flow [2023-11-29 06:51:05,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 06:51:05,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:05,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:05,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:51:05,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 06:51:05,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:05,205 INFO L85 PathProgramCache]: Analyzing trace with hash 9533, now seen corresponding path program 1 times [2023-11-29 06:51:05,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:05,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844365622] [2023-11-29 06:51:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:05,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:05,248 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 06:51:05,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:05,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844365622] [2023-11-29 06:51:05,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844365622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:05,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:05,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:05,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637365151] [2023-11-29 06:51:05,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:05,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:05,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:05,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 61 [2023-11-29 06:51:05,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 06:51:05,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:05,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 61 [2023-11-29 06:51:05,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:05,401 INFO L124 PetriNetUnfolderBase]: 559/1031 cut-off events. [2023-11-29 06:51:05,401 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-29 06:51:05,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 1031 events. 559/1031 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5752 event pairs, 450 based on Foata normal form. 85/1064 useless extension candidates. Maximal degree in co-relation 1886. Up to 799 conditions per place. [2023-11-29 06:51:05,410 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 15 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-29 06:51:05,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 110 flow [2023-11-29 06:51:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2023-11-29 06:51:05,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409836065573771 [2023-11-29 06:51:05,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2023-11-29 06:51:05,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2023-11-29 06:51:05,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:05,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2023-11-29 06:51:05,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 06:51:05,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:05,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:05,415 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 82 flow. Second operand 3 states and 99 transitions. [2023-11-29 06:51:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 110 flow [2023-11-29 06:51:05,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:05,417 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 79 flow [2023-11-29 06:51:05,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-29 06:51:05,418 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-11-29 06:51:05,418 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 79 flow [2023-11-29 06:51:05,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 06:51:05,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:05,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:05,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:51:05,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 06:51:05,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1213951251, now seen corresponding path program 1 times [2023-11-29 06:51:05,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:05,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205944570] [2023-11-29 06:51:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:51:05,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:05,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205944570] [2023-11-29 06:51:05,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205944570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:05,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:05,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:51:05,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697827806] [2023-11-29 06:51:05,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:05,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:05,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:05,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 61 [2023-11-29 06:51:05,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 06:51:05,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:05,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 61 [2023-11-29 06:51:05,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:05,732 INFO L124 PetriNetUnfolderBase]: 1203/2163 cut-off events. [2023-11-29 06:51:05,732 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-29 06:51:05,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3950 conditions, 2163 events. 1203/2163 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13029 event pairs, 303 based on Foata normal form. 0/2052 useless extension candidates. Maximal degree in co-relation 3941. Up to 1003 conditions per place. [2023-11-29 06:51:05,749 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 25 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-29 06:51:05,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 166 flow [2023-11-29 06:51:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-29 06:51:05,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6065573770491803 [2023-11-29 06:51:05,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-29 06:51:05,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-29 06:51:05,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:05,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-29 06:51:05,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 06:51:05,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:05,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:05,754 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 79 flow. Second operand 3 states and 111 transitions. [2023-11-29 06:51:05,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 166 flow [2023-11-29 06:51:05,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:05,756 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 108 flow [2023-11-29 06:51:05,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-29 06:51:05,757 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-11-29 06:51:05,757 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 108 flow [2023-11-29 06:51:05,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 06:51:05,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:05,757 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:05,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:51:05,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 06:51:05,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash -441665005, now seen corresponding path program 1 times [2023-11-29 06:51:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:05,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490856789] [2023-11-29 06:51:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:51:05,776 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:51:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:51:05,791 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:51:05,792 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:51:05,792 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-29 06:51:05,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-11-29 06:51:05,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-29 06:51:05,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-29 06:51:05,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-29 06:51:05,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-29 06:51:05,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-29 06:51:05,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-11-29 06:51:05,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-29 06:51:05,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-29 06:51:05,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 06:51:05,794 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 06:51:05,795 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 06:51:05,795 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 06:51:05,823 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 06:51:05,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 84 transitions, 204 flow [2023-11-29 06:51:05,834 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-11-29 06:51:05,834 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 06:51:05,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 76 events. 6/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 223 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-29 06:51:05,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 84 transitions, 204 flow [2023-11-29 06:51:05,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 127 flow [2023-11-29 06:51:05,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:51:05,837 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;@2e87a35b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:51:05,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-29 06:51:05,839 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:51:05,839 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 06:51:05,839 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:51:05,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:05,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:05,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 06:51:05,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash 12220, now seen corresponding path program 1 times [2023-11-29 06:51:05,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:05,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095571901] [2023-11-29 06:51:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:05,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:05,864 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 06:51:05,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:05,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095571901] [2023-11-29 06:51:05,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095571901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:05,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:05,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232872444] [2023-11-29 06:51:05,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:05,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:05,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 84 [2023-11-29 06:51:05,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 06:51:05,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:05,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 84 [2023-11-29 06:51:05,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:06,763 INFO L124 PetriNetUnfolderBase]: 4414/6931 cut-off events. [2023-11-29 06:51:06,763 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-11-29 06:51:06,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 6931 events. 4414/6931 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 44346 event pairs, 3501 based on Foata normal form. 2734/9416 useless extension candidates. Maximal degree in co-relation 12967. Up to 5731 conditions per place. [2023-11-29 06:51:06,843 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 21 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-29 06:51:06,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 147 flow [2023-11-29 06:51:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2023-11-29 06:51:06,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-11-29 06:51:06,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 136 transitions. [2023-11-29 06:51:06,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 136 transitions. [2023-11-29 06:51:06,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:06,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 136 transitions. [2023-11-29 06:51:06,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:06,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:06,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:06,848 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 127 flow. Second operand 3 states and 136 transitions. [2023-11-29 06:51:06,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 147 flow [2023-11-29 06:51:06,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 144 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:06,851 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 102 flow [2023-11-29 06:51:06,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-11-29 06:51:06,852 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-11-29 06:51:06,852 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 102 flow [2023-11-29 06:51:06,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 06:51:06,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:06,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:06,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:51:06,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 06:51:06,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:06,854 INFO L85 PathProgramCache]: Analyzing trace with hash 12221, now seen corresponding path program 1 times [2023-11-29 06:51:06,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:06,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307613203] [2023-11-29 06:51:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:06,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:06,904 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 06:51:06,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:06,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307613203] [2023-11-29 06:51:06,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307613203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:06,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:06,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230756346] [2023-11-29 06:51:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:06,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:06,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:06,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:06,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2023-11-29 06:51:06,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:06,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:06,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2023-11-29 06:51:06,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:07,526 INFO L124 PetriNetUnfolderBase]: 3247/5207 cut-off events. [2023-11-29 06:51:07,526 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2023-11-29 06:51:07,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 5207 events. 3247/5207 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 32779 event pairs, 2562 based on Foata normal form. 341/5315 useless extension candidates. Maximal degree in co-relation 9694. Up to 4239 conditions per place. [2023-11-29 06:51:07,570 INFO L140 encePairwiseOnDemand]: 81/84 looper letters, 19 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-29 06:51:07,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 138 flow [2023-11-29 06:51:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-29 06:51:07,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-29 06:51:07,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-29 06:51:07,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-29 06:51:07,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:07,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-29 06:51:07,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 06:51:07,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:07,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:07,575 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 102 flow. Second operand 3 states and 133 transitions. [2023-11-29 06:51:07,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 138 flow [2023-11-29 06:51:07,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:07,577 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 99 flow [2023-11-29 06:51:07,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-11-29 06:51:07,578 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-11-29 06:51:07,578 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 99 flow [2023-11-29 06:51:07,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:07,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:07,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:07,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 06:51:07,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 06:51:07,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash 546408773, now seen corresponding path program 1 times [2023-11-29 06:51:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128133414] [2023-11-29 06:51:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:07,616 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 06:51:07,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128133414] [2023-11-29 06:51:07,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128133414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:07,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:07,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:51:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888823454] [2023-11-29 06:51:07,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:07,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:07,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2023-11-29 06:51:07,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 06:51:07,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:07,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2023-11-29 06:51:07,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:08,838 INFO L124 PetriNetUnfolderBase]: 6995/11048 cut-off events. [2023-11-29 06:51:08,839 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-11-29 06:51:08,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20554 conditions, 11048 events. 6995/11048 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 74405 event pairs, 1712 based on Foata normal form. 0/10546 useless extension candidates. Maximal degree in co-relation 20544. Up to 5767 conditions per place. [2023-11-29 06:51:08,902 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 32 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-11-29 06:51:08,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 215 flow [2023-11-29 06:51:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-29 06:51:08,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2023-11-29 06:51:08,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-29 06:51:08,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-29 06:51:08,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:08,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-29 06:51:08,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:08,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:08,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:08,907 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 99 flow. Second operand 3 states and 146 transitions. [2023-11-29 06:51:08,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 215 flow [2023-11-29 06:51:08,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:08,909 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 136 flow [2023-11-29 06:51:08,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-29 06:51:08,910 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-29 06:51:08,910 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 136 flow [2023-11-29 06:51:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 06:51:08,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:08,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:08,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 06:51:08,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 06:51:08,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2042652943, now seen corresponding path program 1 times [2023-11-29 06:51:08,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:08,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662321131] [2023-11-29 06:51:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:08,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:08,977 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 06:51:08,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:08,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662321131] [2023-11-29 06:51:08,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662321131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:08,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:08,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:51:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556826420] [2023-11-29 06:51:08,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:08,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:08,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:08,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:08,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-29 06:51:08,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 06:51:08,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:08,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-29 06:51:08,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:09,174 INFO L124 PetriNetUnfolderBase]: 598/1424 cut-off events. [2023-11-29 06:51:09,174 INFO L125 PetriNetUnfolderBase]: For 381/381 co-relation queries the response was YES. [2023-11-29 06:51:09,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 1424 events. 598/1424 cut-off events. For 381/381 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9078 event pairs, 95 based on Foata normal form. 768/2128 useless extension candidates. Maximal degree in co-relation 3052. Up to 815 conditions per place. [2023-11-29 06:51:09,185 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 21 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2023-11-29 06:51:09,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 219 flow [2023-11-29 06:51:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-29 06:51:09,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-29 06:51:09,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-29 06:51:09,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-29 06:51:09,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:09,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-29 06:51:09,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 06:51:09,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:09,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:09,189 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 136 flow. Second operand 3 states and 147 transitions. [2023-11-29 06:51:09,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 219 flow [2023-11-29 06:51:09,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:51:09,194 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 142 flow [2023-11-29 06:51:09,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-29 06:51:09,195 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-29 06:51:09,195 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 142 flow [2023-11-29 06:51:09,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 06:51:09,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:09,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 06:51:09,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 06:51:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash 433299775, now seen corresponding path program 1 times [2023-11-29 06:51:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:09,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692652349] [2023-11-29 06:51:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:09,281 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 06:51:09,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:09,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692652349] [2023-11-29 06:51:09,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692652349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:09,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:09,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:51:09,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312803840] [2023-11-29 06:51:09,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:09,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:51:09,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:51:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:51:09,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2023-11-29 06:51:09,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:09,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:09,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2023-11-29 06:51:09,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:09,599 INFO L124 PetriNetUnfolderBase]: 971/2342 cut-off events. [2023-11-29 06:51:09,599 INFO L125 PetriNetUnfolderBase]: For 672/702 co-relation queries the response was YES. [2023-11-29 06:51:09,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5528 conditions, 2342 events. 971/2342 cut-off events. For 672/702 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17380 event pairs, 52 based on Foata normal form. 24/2350 useless extension candidates. Maximal degree in co-relation 5516. Up to 1117 conditions per place. [2023-11-29 06:51:09,614 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 43 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2023-11-29 06:51:09,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 372 flow [2023-11-29 06:51:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:51:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:51:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2023-11-29 06:51:09,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-29 06:51:09,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 204 transitions. [2023-11-29 06:51:09,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 204 transitions. [2023-11-29 06:51:09,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:09,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 204 transitions. [2023-11-29 06:51:09,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 06:51:09,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 06:51:09,619 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 06:51:09,619 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 142 flow. Second operand 4 states and 204 transitions. [2023-11-29 06:51:09,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 372 flow [2023-11-29 06:51:09,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:09,623 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 213 flow [2023-11-29 06:51:09,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-11-29 06:51:09,623 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-29 06:51:09,624 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 213 flow [2023-11-29 06:51:09,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:09,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:09,624 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:09,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 06:51:09,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 06:51:09,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash -750422013, now seen corresponding path program 1 times [2023-11-29 06:51:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:09,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561645802] [2023-11-29 06:51:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:51:09,643 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:51:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:51:09,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:51:09,659 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:51:09,659 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-11-29 06:51:09,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2023-11-29 06:51:09,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-11-29 06:51:09,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-11-29 06:51:09,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-11-29 06:51:09,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-11-29 06:51:09,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-11-29 06:51:09,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 11 remaining) [2023-11-29 06:51:09,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2023-11-29 06:51:09,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2023-11-29 06:51:09,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-11-29 06:51:09,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 06:51:09,661 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-29 06:51:09,662 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 06:51:09,662 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 06:51:09,694 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 06:51:09,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 270 flow [2023-11-29 06:51:09,706 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2023-11-29 06:51:09,706 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 06:51:09,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 92 events. 7/92 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 264 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 108. Up to 5 conditions per place. [2023-11-29 06:51:09,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 107 transitions, 270 flow [2023-11-29 06:51:09,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 61 transitions, 153 flow [2023-11-29 06:51:09,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:51:09,709 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;@2e87a35b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:51:09,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-29 06:51:09,710 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:51:09,710 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 06:51:09,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:51:09,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:09,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:09,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:51:09,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash 15644, now seen corresponding path program 1 times [2023-11-29 06:51:09,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:09,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386792867] [2023-11-29 06:51:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:09,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:09,733 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 06:51:09,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:09,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386792867] [2023-11-29 06:51:09,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386792867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:09,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:09,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:09,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820513349] [2023-11-29 06:51:09,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:09,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:09,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:09,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 107 [2023-11-29 06:51:09,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:09,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:09,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 107 [2023-11-29 06:51:09,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:12,481 INFO L124 PetriNetUnfolderBase]: 23102/33235 cut-off events. [2023-11-29 06:51:12,481 INFO L125 PetriNetUnfolderBase]: For 4208/4208 co-relation queries the response was YES. [2023-11-29 06:51:12,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63223 conditions, 33235 events. 23102/33235 cut-off events. For 4208/4208 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 224375 event pairs, 18093 based on Foata normal form. 13682/45900 useless extension candidates. Maximal degree in co-relation 63207. Up to 28387 conditions per place. [2023-11-29 06:51:12,661 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 25 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-29 06:51:12,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 179 flow [2023-11-29 06:51:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2023-11-29 06:51:12,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327102803738317 [2023-11-29 06:51:12,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 171 transitions. [2023-11-29 06:51:12,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 171 transitions. [2023-11-29 06:51:12,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:12,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 171 transitions. [2023-11-29 06:51:12,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 06:51:12,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:51:12,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:51:12,665 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 153 flow. Second operand 3 states and 171 transitions. [2023-11-29 06:51:12,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 179 flow [2023-11-29 06:51:12,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 172 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:12,668 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 122 flow [2023-11-29 06:51:12,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-29 06:51:12,669 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2023-11-29 06:51:12,669 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 122 flow [2023-11-29 06:51:12,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:12,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:12,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 06:51:12,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:51:12,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 15645, now seen corresponding path program 1 times [2023-11-29 06:51:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285263714] [2023-11-29 06:51:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:12,710 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 06:51:12,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:12,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285263714] [2023-11-29 06:51:12,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285263714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:12,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:12,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:12,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833959635] [2023-11-29 06:51:12,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:12,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:12,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:12,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:12,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 107 [2023-11-29 06:51:12,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 06:51:12,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:12,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 107 [2023-11-29 06:51:12,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:14,527 INFO L124 PetriNetUnfolderBase]: 17071/25079 cut-off events. [2023-11-29 06:51:14,527 INFO L125 PetriNetUnfolderBase]: For 1396/1396 co-relation queries the response was YES. [2023-11-29 06:51:14,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47208 conditions, 25079 events. 17071/25079 cut-off events. For 1396/1396 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 169425 event pairs, 13314 based on Foata normal form. 1365/25451 useless extension candidates. Maximal degree in co-relation 47198. Up to 21103 conditions per place. [2023-11-29 06:51:14,669 INFO L140 encePairwiseOnDemand]: 104/107 looper letters, 23 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-29 06:51:14,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 166 flow [2023-11-29 06:51:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2023-11-29 06:51:14,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202492211838006 [2023-11-29 06:51:14,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2023-11-29 06:51:14,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2023-11-29 06:51:14,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:14,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2023-11-29 06:51:14,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 06:51:14,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:51:14,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:51:14,673 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 122 flow. Second operand 3 states and 167 transitions. [2023-11-29 06:51:14,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 166 flow [2023-11-29 06:51:14,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:14,675 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 119 flow [2023-11-29 06:51:14,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-29 06:51:14,676 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -11 predicate places. [2023-11-29 06:51:14,676 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 119 flow [2023-11-29 06:51:14,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 06:51:14,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:14,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:14,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 06:51:14,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:51:14,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2034661029, now seen corresponding path program 1 times [2023-11-29 06:51:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:14,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179147930] [2023-11-29 06:51:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:14,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:14,708 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 06:51:14,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:14,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179147930] [2023-11-29 06:51:14,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179147930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:14,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:14,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:51:14,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838168087] [2023-11-29 06:51:14,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:14,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:14,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:14,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:14,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:14,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 107 [2023-11-29 06:51:14,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 06:51:14,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:14,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 107 [2023-11-29 06:51:14,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:18,630 INFO L124 PetriNetUnfolderBase]: 36336/52782 cut-off events. [2023-11-29 06:51:18,631 INFO L125 PetriNetUnfolderBase]: For 2305/2305 co-relation queries the response was YES. [2023-11-29 06:51:18,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99352 conditions, 52782 events. 36336/52782 cut-off events. For 2305/2305 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 376836 event pairs, 9261 based on Foata normal form. 0/50636 useless extension candidates. Maximal degree in co-relation 99341. Up to 29392 conditions per place. [2023-11-29 06:51:18,954 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 39 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-11-29 06:51:18,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 264 flow [2023-11-29 06:51:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-11-29 06:51:18,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638629283489096 [2023-11-29 06:51:18,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-11-29 06:51:18,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-11-29 06:51:18,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:18,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-11-29 06:51:18,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 06:51:18,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:51:18,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:51:18,959 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 119 flow. Second operand 3 states and 181 transitions. [2023-11-29 06:51:18,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 264 flow [2023-11-29 06:51:18,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:18,963 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 164 flow [2023-11-29 06:51:18,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-29 06:51:18,964 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-11-29 06:51:18,964 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 164 flow [2023-11-29 06:51:18,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 06:51:18,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:18,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:18,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 06:51:18,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:51:18,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash -46461627, now seen corresponding path program 1 times [2023-11-29 06:51:18,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:18,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673258650] [2023-11-29 06:51:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:18,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:51:19,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:19,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673258650] [2023-11-29 06:51:19,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673258650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:19,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:19,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:51:19,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020113473] [2023-11-29 06:51:19,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:19,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:19,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:19,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:19,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:19,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2023-11-29 06:51:19,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 06:51:19,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:19,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2023-11-29 06:51:19,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:19,499 INFO L124 PetriNetUnfolderBase]: 1597/3562 cut-off events. [2023-11-29 06:51:19,499 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2023-11-29 06:51:19,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 3562 events. 1597/3562 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 26295 event pairs, 245 based on Foata normal form. 2631/6063 useless extension candidates. Maximal degree in co-relation 7816. Up to 2169 conditions per place. [2023-11-29 06:51:19,523 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 25 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2023-11-29 06:51:19,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 266 flow [2023-11-29 06:51:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2023-11-29 06:51:19,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5700934579439252 [2023-11-29 06:51:19,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2023-11-29 06:51:19,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2023-11-29 06:51:19,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:19,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2023-11-29 06:51:19,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:19,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:51:19,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:51:19,527 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 164 flow. Second operand 3 states and 183 transitions. [2023-11-29 06:51:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 266 flow [2023-11-29 06:51:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:51:19,536 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 172 flow [2023-11-29 06:51:19,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-29 06:51:19,537 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-11-29 06:51:19,537 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 172 flow [2023-11-29 06:51:19,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 06:51:19,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:19,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:19,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 06:51:19,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:51:19,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:19,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1114425002, now seen corresponding path program 1 times [2023-11-29 06:51:19,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:19,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599728402] [2023-11-29 06:51:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:19,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:19,629 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 06:51:19,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:19,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599728402] [2023-11-29 06:51:19,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599728402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:19,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:19,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:51:19,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113379673] [2023-11-29 06:51:19,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:19,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:51:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:51:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:51:19,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2023-11-29 06:51:19,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 06:51:19,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:19,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2023-11-29 06:51:19,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:20,275 INFO L124 PetriNetUnfolderBase]: 2452/5468 cut-off events. [2023-11-29 06:51:20,275 INFO L125 PetriNetUnfolderBase]: For 1531/1591 co-relation queries the response was YES. [2023-11-29 06:51:20,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13283 conditions, 5468 events. 2452/5468 cut-off events. For 1531/1591 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44547 event pairs, 86 based on Foata normal form. 42/5490 useless extension candidates. Maximal degree in co-relation 13270. Up to 3063 conditions per place. [2023-11-29 06:51:20,305 INFO L140 encePairwiseOnDemand]: 101/107 looper letters, 53 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2023-11-29 06:51:20,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 89 transitions, 466 flow [2023-11-29 06:51:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:51:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:51:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2023-11-29 06:51:20,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957943925233645 [2023-11-29 06:51:20,307 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 255 transitions. [2023-11-29 06:51:20,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 255 transitions. [2023-11-29 06:51:20,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:20,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 255 transitions. [2023-11-29 06:51:20,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states 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 06:51:20,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 06:51:20,310 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 06:51:20,310 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 172 flow. Second operand 4 states and 255 transitions. [2023-11-29 06:51:20,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 89 transitions, 466 flow [2023-11-29 06:51:20,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:20,316 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 266 flow [2023-11-29 06:51:20,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2023-11-29 06:51:20,316 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-11-29 06:51:20,317 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 266 flow [2023-11-29 06:51:20,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 06:51:20,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:20,317 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:20,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 06:51:20,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-29 06:51:20,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:20,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1526174615, now seen corresponding path program 1 times [2023-11-29 06:51:20,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:20,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224122999] [2023-11-29 06:51:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:20,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:51:20,337 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:51:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:51:20,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:51:20,355 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:51:20,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 12 remaining) [2023-11-29 06:51:20,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 12 remaining) [2023-11-29 06:51:20,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-11-29 06:51:20,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-11-29 06:51:20,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-11-29 06:51:20,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-11-29 06:51:20,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 12 remaining) [2023-11-29 06:51:20,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 12 remaining) [2023-11-29 06:51:20,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-11-29 06:51:20,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-11-29 06:51:20,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 12 remaining) [2023-11-29 06:51:20,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 12 remaining) [2023-11-29 06:51:20,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 06:51:20,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-29 06:51:20,357 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 06:51:20,358 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-29 06:51:20,397 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 06:51:20,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 130 transitions, 340 flow [2023-11-29 06:51:20,409 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-29 06:51:20,409 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 06:51:20,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 108 events. 8/108 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 319 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 130. Up to 6 conditions per place. [2023-11-29 06:51:20,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 130 transitions, 340 flow [2023-11-29 06:51:20,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 69 transitions, 181 flow [2023-11-29 06:51:20,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:51:20,412 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;@2e87a35b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:51:20,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-29 06:51:20,413 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:51:20,413 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 06:51:20,413 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:51:20,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:20,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:20,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 06:51:20,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash 19804, now seen corresponding path program 1 times [2023-11-29 06:51:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:20,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225354863] [2023-11-29 06:51:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:20,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:20,435 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 06:51:20,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:20,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225354863] [2023-11-29 06:51:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225354863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:20,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933654362] [2023-11-29 06:51:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:20,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:20,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:20,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:20,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 130 [2023-11-29 06:51:20,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 06:51:20,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:20,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 130 [2023-11-29 06:51:20,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:34,528 INFO L124 PetriNetUnfolderBase]: 114238/154835 cut-off events. [2023-11-29 06:51:34,528 INFO L125 PetriNetUnfolderBase]: For 26992/26992 co-relation queries the response was YES. [2023-11-29 06:51:34,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297976 conditions, 154835 events. 114238/154835 cut-off events. For 26992/26992 co-relation queries the response was YES. Maximal size of possible extension queue 5276. Compared 1082223 event pairs, 88749 based on Foata normal form. 65647/216394 useless extension candidates. Maximal degree in co-relation 297959. Up to 135395 conditions per place. [2023-11-29 06:51:35,517 INFO L140 encePairwiseOnDemand]: 118/130 looper letters, 29 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-29 06:51:35,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 213 flow [2023-11-29 06:51:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-11-29 06:51:35,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282051282051282 [2023-11-29 06:51:35,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-11-29 06:51:35,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-11-29 06:51:35,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:35,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-11-29 06:51:35,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 06:51:35,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:51:35,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:51:35,522 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 181 flow. Second operand 3 states and 206 transitions. [2023-11-29 06:51:35,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 213 flow [2023-11-29 06:51:35,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 55 transitions, 200 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:35,534 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 142 flow [2023-11-29 06:51:35,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2023-11-29 06:51:35,535 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -11 predicate places. [2023-11-29 06:51:35,535 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 142 flow [2023-11-29 06:51:35,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 06:51:35,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:35,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:51:35,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 06:51:35,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 06:51:35,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:35,536 INFO L85 PathProgramCache]: Analyzing trace with hash 19805, now seen corresponding path program 1 times [2023-11-29 06:51:35,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:35,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627866402] [2023-11-29 06:51:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:35,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:35,570 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 06:51:35,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:35,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627866402] [2023-11-29 06:51:35,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627866402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:35,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:35,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:51:35,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518136065] [2023-11-29 06:51:35,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:35,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:35,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:35,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 130 [2023-11-29 06:51:35,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 06:51:35,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:35,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 130 [2023-11-29 06:51:35,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:51:44,709 INFO L124 PetriNetUnfolderBase]: 84655/117047 cut-off events. [2023-11-29 06:51:44,709 INFO L125 PetriNetUnfolderBase]: For 5364/5364 co-relation queries the response was YES. [2023-11-29 06:51:45,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222057 conditions, 117047 events. 84655/117047 cut-off events. For 5364/5364 co-relation queries the response was YES. Maximal size of possible extension queue 4177. Compared 828597 event pairs, 65538 based on Foata normal form. 5461/118412 useless extension candidates. Maximal degree in co-relation 222046. Up to 100911 conditions per place. [2023-11-29 06:51:45,472 INFO L140 encePairwiseOnDemand]: 127/130 looper letters, 27 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-29 06:51:45,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 194 flow [2023-11-29 06:51:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:51:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:51:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-29 06:51:45,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2023-11-29 06:51:45,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-29 06:51:45,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-29 06:51:45,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:51:45,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-29 06:51:45,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:45,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:51:45,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:51:45,476 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 142 flow. Second operand 3 states and 201 transitions. [2023-11-29 06:51:45,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 194 flow [2023-11-29 06:51:45,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 193 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:51:45,479 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 139 flow [2023-11-29 06:51:45,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=139, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-11-29 06:51:45,480 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -12 predicate places. [2023-11-29 06:51:45,480 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 139 flow [2023-11-29 06:51:45,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 06:51:45,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:51:45,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:51:45,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 06:51:45,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 06:51:45,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:45,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1520786633, now seen corresponding path program 1 times [2023-11-29 06:51:45,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:45,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383899199] [2023-11-29 06:51:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:45,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:45,519 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 06:51:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383899199] [2023-11-29 06:51:45,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383899199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:51:45,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:51:45,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:51:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143705269] [2023-11-29 06:51:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:51:45,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:51:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:51:45,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 130 [2023-11-29 06:51:45,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:51:45,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:51:45,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 130 [2023-11-29 06:51:45,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:04,785 INFO L124 PetriNetUnfolderBase]: 178118/244037 cut-off events. [2023-11-29 06:52:04,785 INFO L125 PetriNetUnfolderBase]: For 9154/9154 co-relation queries the response was YES. [2023-11-29 06:52:05,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463224 conditions, 244037 events. 178118/244037 cut-off events. For 9154/9154 co-relation queries the response was YES. Maximal size of possible extension queue 8126. Compared 1806966 event pairs, 48026 based on Foata normal form. 0/235128 useless extension candidates. Maximal degree in co-relation 463212. Up to 141658 conditions per place. [2023-11-29 06:52:06,500 INFO L140 encePairwiseOnDemand]: 122/130 looper letters, 46 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-11-29 06:52:06,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 313 flow [2023-11-29 06:52:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:52:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-11-29 06:52:06,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2023-11-29 06:52:06,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-11-29 06:52:06,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-11-29 06:52:06,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:06,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-11-29 06:52:06,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 06:52:06,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:52:06,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:52:06,504 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 139 flow. Second operand 3 states and 216 transitions. [2023-11-29 06:52:06,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 313 flow [2023-11-29 06:52:06,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:52:06,511 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 192 flow [2023-11-29 06:52:06,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-29 06:52:06,511 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -9 predicate places. [2023-11-29 06:52:06,512 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 192 flow [2023-11-29 06:52:06,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:06,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:06,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:06,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 06:52:06,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 06:52:06,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1344843949, now seen corresponding path program 1 times [2023-11-29 06:52:06,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:06,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201310014] [2023-11-29 06:52:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:06,561 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 06:52:06,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:06,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201310014] [2023-11-29 06:52:06,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201310014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:06,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:06,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:52:06,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828647140] [2023-11-29 06:52:06,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:06,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:06,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:06,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:06,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 130 [2023-11-29 06:52:06,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 06:52:06,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:06,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 130 [2023-11-29 06:52:06,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:07,337 INFO L124 PetriNetUnfolderBase]: 3960/8451 cut-off events. [2023-11-29 06:52:07,337 INFO L125 PetriNetUnfolderBase]: For 2996/2996 co-relation queries the response was YES. [2023-11-29 06:52:07,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18878 conditions, 8451 events. 3960/8451 cut-off events. For 2996/2996 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 70265 event pairs, 617 based on Foata normal form. 7905/16128 useless extension candidates. Maximal degree in co-relation 18863. Up to 5378 conditions per place. [2023-11-29 06:52:07,398 INFO L140 encePairwiseOnDemand]: 118/130 looper letters, 29 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2023-11-29 06:52:07,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 313 flow [2023-11-29 06:52:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:52:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-11-29 06:52:07,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2023-11-29 06:52:07,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-11-29 06:52:07,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-11-29 06:52:07,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:07,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-11-29 06:52:07,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 06:52:07,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:52:07,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:52:07,401 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 192 flow. Second operand 3 states and 219 transitions. [2023-11-29 06:52:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 313 flow [2023-11-29 06:52:07,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 67 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:52:07,416 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 202 flow [2023-11-29 06:52:07,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-29 06:52:07,417 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -9 predicate places. [2023-11-29 06:52:07,417 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 202 flow [2023-11-29 06:52:07,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 06:52:07,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:07,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:07,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 06:52:07,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 06:52:07,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash 148132923, now seen corresponding path program 1 times [2023-11-29 06:52:07,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:07,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822316299] [2023-11-29 06:52:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:07,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:07,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:07,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822316299] [2023-11-29 06:52:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822316299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:07,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:07,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:52:07,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829959428] [2023-11-29 06:52:07,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:07,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:52:07,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:07,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:52:07,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:52:07,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 130 [2023-11-29 06:52:07,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 06:52:07,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:07,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 130 [2023-11-29 06:52:07,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:08,805 INFO L124 PetriNetUnfolderBase]: 5746/12084 cut-off events. [2023-11-29 06:52:08,805 INFO L125 PetriNetUnfolderBase]: For 3218/3318 co-relation queries the response was YES. [2023-11-29 06:52:08,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29998 conditions, 12084 events. 5746/12084 cut-off events. For 3218/3318 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 105470 event pairs, 162 based on Foata normal form. 65/12126 useless extension candidates. Maximal degree in co-relation 29984. Up to 7677 conditions per place. [2023-11-29 06:52:08,887 INFO L140 encePairwiseOnDemand]: 123/130 looper letters, 63 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2023-11-29 06:52:08,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 105 transitions, 560 flow [2023-11-29 06:52:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:52:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:52:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 306 transitions. [2023-11-29 06:52:08,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884615384615385 [2023-11-29 06:52:08,889 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 306 transitions. [2023-11-29 06:52:08,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 306 transitions. [2023-11-29 06:52:08,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:08,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 306 transitions. [2023-11-29 06:52:08,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 06:52:08,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states 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 06:52:08,891 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states 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 06:52:08,891 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 202 flow. Second operand 4 states and 306 transitions. [2023-11-29 06:52:08,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 105 transitions, 560 flow [2023-11-29 06:52:08,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 529 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:52:08,900 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 319 flow [2023-11-29 06:52:08,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-11-29 06:52:08,901 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2023-11-29 06:52:08,901 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 319 flow [2023-11-29 06:52:08,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 06:52:08,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:08,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:08,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 06:52:08,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 06:52:08,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:08,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1487341457, now seen corresponding path program 1 times [2023-11-29 06:52:08,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:08,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520621855] [2023-11-29 06:52:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:08,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:08,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520621855] [2023-11-29 06:52:08,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520621855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:52:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605232525] [2023-11-29 06:52:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:08,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:09,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:09,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:09,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:52:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:09,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:52:09,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:09,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:09,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605232525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:09,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:52:09,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 06:52:09,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158891836] [2023-11-29 06:52:09,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:09,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:52:09,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:52:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:52:09,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 130 [2023-11-29 06:52:09,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 319 flow. Second operand has 11 states, 11 states have (on average 62.54545454545455) internal successors, (688), 11 states have internal predecessors, (688), 0 states have call successors, (0), 0 states 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 06:52:09,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:09,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 130 [2023-11-29 06:52:09,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:12,322 INFO L124 PetriNetUnfolderBase]: 14388/29897 cut-off events. [2023-11-29 06:52:12,322 INFO L125 PetriNetUnfolderBase]: For 12069/12169 co-relation queries the response was YES. [2023-11-29 06:52:12,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70943 conditions, 29897 events. 14388/29897 cut-off events. For 12069/12169 co-relation queries the response was YES. Maximal size of possible extension queue 1360. Compared 293471 event pairs, 2531 based on Foata normal form. 191/30065 useless extension candidates. Maximal degree in co-relation 70926. Up to 8691 conditions per place. [2023-11-29 06:52:12,526 INFO L140 encePairwiseOnDemand]: 123/130 looper letters, 59 selfloop transitions, 46 changer transitions 0/131 dead transitions. [2023-11-29 06:52:12,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 131 transitions, 791 flow [2023-11-29 06:52:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:52:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:52:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 371 transitions. [2023-11-29 06:52:12,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707692307692308 [2023-11-29 06:52:12,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 371 transitions. [2023-11-29 06:52:12,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 371 transitions. [2023-11-29 06:52:12,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:12,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 371 transitions. [2023-11-29 06:52:12,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 06:52:12,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 06:52:12,531 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 06:52:12,531 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 319 flow. Second operand 5 states and 371 transitions. [2023-11-29 06:52:12,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 131 transitions, 791 flow [2023-11-29 06:52:12,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 131 transitions, 791 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:52:12,540 INFO L231 Difference]: Finished difference. Result has 74 places, 94 transitions, 563 flow [2023-11-29 06:52:12,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=563, PETRI_PLACES=74, PETRI_TRANSITIONS=94} [2023-11-29 06:52:12,541 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -1 predicate places. [2023-11-29 06:52:12,541 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 94 transitions, 563 flow [2023-11-29 06:52:12,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 62.54545454545455) internal successors, (688), 11 states have internal predecessors, (688), 0 states have call successors, (0), 0 states 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 06:52:12,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:12,541 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:12,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:12,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06c1df2-773f-4def-8517-4de07bbea133/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:52:12,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 06:52:12,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash 10330639, now seen corresponding path program 1 times [2023-11-29 06:52:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:12,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742818525] [2023-11-29 06:52:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:52:12,760 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:52:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:52:12,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:52:12,778 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:52:12,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-29 06:52:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (11 of 13 remaining) [2023-11-29 06:52:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-29 06:52:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-11-29 06:52:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-29 06:52:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-29 06:52:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-11-29 06:52:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 13 remaining) [2023-11-29 06:52:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 13 remaining) [2023-11-29 06:52:12,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2023-11-29 06:52:12,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2023-11-29 06:52:12,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 13 remaining) [2023-11-29 06:52:12,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-11-29 06:52:12,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 06:52:12,780 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:12,781 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 06:52:12,781 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-29 06:52:12,818 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 06:52:12,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 153 transitions, 414 flow [2023-11-29 06:52:12,833 INFO L124 PetriNetUnfolderBase]: 9/124 cut-off events. [2023-11-29 06:52:12,833 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-29 06:52:12,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 124 events. 9/124 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 355 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 153. Up to 7 conditions per place. [2023-11-29 06:52:12,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 153 transitions, 414 flow [2023-11-29 06:52:12,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 77 transitions, 211 flow [2023-11-29 06:52:12,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:52:12,836 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;@2e87a35b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:52:12,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-11-29 06:52:12,837 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:52:12,837 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 06:52:12,837 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:52:12,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:12,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:52:12,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-29 06:52:12,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:12,838 INFO L85 PathProgramCache]: Analyzing trace with hash 24700, now seen corresponding path program 1 times [2023-11-29 06:52:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504387371] [2023-11-29 06:52:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:52:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:52:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504387371] [2023-11-29 06:52:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504387371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:12,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:12,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:52:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632608295] [2023-11-29 06:52:12,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:52:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:12,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:12,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 153 [2023-11-29 06:52:12,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 06:52:12,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:12,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 153 [2023-11-29 06:52:12,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand