./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/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_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/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_2a8af2e0-4614-4dda-be88-b68b6b8996ae/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 8f8226cdfe97f42edd1b15fbab303246bf7577cc25c46c21444e4109afadd604 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:12:48,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:12:48,863 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:12:48,867 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:12:48,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:12:48,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:12:48,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:12:48,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:12:48,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:12:48,892 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:12:48,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:12:48,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:12:48,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:12:48,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:12:48,895 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:12:48,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:12:48,896 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:12:48,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:12:48,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:12:48,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:12:48,898 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:12:48,901 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:12:48,902 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:12:48,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:12:48,903 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:12:48,903 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:12:48,904 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:12:48,904 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:12:48,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:12:48,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:12:48,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:12:48,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:12:48,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:12:48,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:12:48,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:12:48,907 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:12:48,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:12:48,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:12:48,907 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:12:48,907 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:12:48,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:12:48,908 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_2a8af2e0-4614-4dda-be88-b68b6b8996ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f8226cdfe97f42edd1b15fbab303246bf7577cc25c46c21444e4109afadd604 [2023-11-29 00:12:49,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:12:49,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:12:49,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:12:49,155 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:12:49,155 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:12:49,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i [2023-11-29 00:12:51,927 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:12:52,165 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:12:52,166 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i [2023-11-29 00:12:52,183 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/data/1f99cfbea/b8aaee13562c48f9b6f8cd212078b056/FLAG64f627bf0 [2023-11-29 00:12:52,204 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/data/1f99cfbea/b8aaee13562c48f9b6f8cd212078b056 [2023-11-29 00:12:52,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:12:52,208 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:12:52,209 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:12:52,209 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:12:52,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:12:52,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639b3179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52, skipping insertion in model container [2023-11-29 00:12:52,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,293 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:12:52,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:12:52,595 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:12:52,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:12:52,672 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:12:52,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52 WrapperNode [2023-11-29 00:12:52,673 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:12:52,674 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:12:52,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:12:52,674 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:12:52,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,694 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,715 INFO L138 Inliner]: procedures = 165, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2023-11-29 00:12:52,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:12:52,716 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:12:52,716 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:12:52,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:12:52,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,729 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,744 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 00:12:52,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,750 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,753 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,755 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:12:52,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:12:52,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:12:52,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:12:52,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (1/1) ... [2023-11-29 00:12:52,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:12:52,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:12:52,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:12:52,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a8af2e0-4614-4dda-be88-b68b6b8996ae/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:12:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-29 00:12:52,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-29 00:12:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 00:12:52,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 00:12:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:12:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:12:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:12:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 00:12:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:12:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:12:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:12:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:12:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:12:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:12:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 00:12:52,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:12:52,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:12:52,834 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 00:12:52,960 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:12:52,962 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:12:53,122 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:12:53,234 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:12:53,235 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:12:53,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:12:53 BoogieIcfgContainer [2023-11-29 00:12:53,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:12:53,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:12:53,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:12:53,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:12:53,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:12:52" (1/3) ... [2023-11-29 00:12:53,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d46eead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:12:53, skipping insertion in model container [2023-11-29 00:12:53,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:12:52" (2/3) ... [2023-11-29 00:12:53,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d46eead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:12:53, skipping insertion in model container [2023-11-29 00:12:53,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:12:53" (3/3) ... [2023-11-29 00:12:53,244 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs-pthread.i [2023-11-29 00:12:53,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:12:53,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-29 00:12:53,259 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:12:53,298 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 00:12:53,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 94 flow [2023-11-29 00:12:53,357 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-11-29 00:12:53,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:12:53,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 4/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 123 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-11-29 00:12:53,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 94 flow [2023-11-29 00:12:53,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 91 flow [2023-11-29 00:12:53,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:12:53,383 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;@20f32da2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:12:53,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-29 00:12:53,387 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:12:53,387 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 00:12:53,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:12:53,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:53,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:12:53,388 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 00:12:53,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:53,394 INFO L85 PathProgramCache]: Analyzing trace with hash 8720, now seen corresponding path program 1 times [2023-11-29 00:12:53,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:53,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274866042] [2023-11-29 00:12:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:53,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:53,617 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 00:12:53,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274866042] [2023-11-29 00:12:53,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274866042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:12:53,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:12:53,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:12:53,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568678155] [2023-11-29 00:12:53,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:12:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:12:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:12:53,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:12:53,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2023-11-29 00:12:53,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 00:12:53,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:53,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2023-11-29 00:12:53,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:53,833 INFO L124 PetriNetUnfolderBase]: 278/507 cut-off events. [2023-11-29 00:12:53,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:12:53,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 507 events. 278/507 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2581 event pairs, 261 based on Foata normal form. 142/628 useless extension candidates. Maximal degree in co-relation 979. Up to 471 conditions per place. [2023-11-29 00:12:53,843 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 21 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-29 00:12:53,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 117 flow [2023-11-29 00:12:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:12:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:12:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-29 00:12:53,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2023-11-29 00:12:53,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-29 00:12:53,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-29 00:12:53,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:12:53,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-29 00:12:53,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 00:12:53,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 00:12:53,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 00:12:53,869 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 91 flow. Second operand 3 states and 67 transitions. [2023-11-29 00:12:53,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 117 flow [2023-11-29 00:12:53,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:12:53,875 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 74 flow [2023-11-29 00:12:53,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-29 00:12:53,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2023-11-29 00:12:53,907 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 74 flow [2023-11-29 00:12:53,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 00:12:53,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:53,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:12:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:12:53,908 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 00:12:53,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash 8721, now seen corresponding path program 1 times [2023-11-29 00:12:53,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:53,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594021629] [2023-11-29 00:12:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:53,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:54,032 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 00:12:54,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:54,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594021629] [2023-11-29 00:12:54,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594021629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:12:54,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:12:54,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:12:54,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525014438] [2023-11-29 00:12:54,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:12:54,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:12:54,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:54,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:12:54,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:12:54,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2023-11-29 00:12:54,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 74 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 00:12:54,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:54,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2023-11-29 00:12:54,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:54,136 INFO L124 PetriNetUnfolderBase]: 198/374 cut-off events. [2023-11-29 00:12:54,136 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 00:12:54,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 374 events. 198/374 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1801 event pairs, 185 based on Foata normal form. 49/406 useless extension candidates. Maximal degree in co-relation 724. Up to 342 conditions per place. [2023-11-29 00:12:54,141 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 19 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-29 00:12:54,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 110 flow [2023-11-29 00:12:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:12:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:12:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-29 00:12:54,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2023-11-29 00:12:54,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-29 00:12:54,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-29 00:12:54,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:12:54,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-29 00:12:54,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 00:12:54,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 00:12:54,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 00:12:54,146 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 74 flow. Second operand 3 states and 67 transitions. [2023-11-29 00:12:54,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 110 flow [2023-11-29 00:12:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:12:54,148 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 71 flow [2023-11-29 00:12:54,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-29 00:12:54,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-11-29 00:12:54,150 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 71 flow [2023-11-29 00:12:54,150 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 00:12:54,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:54,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:12:54,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:12:54,151 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 00:12:54,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash 551858023, now seen corresponding path program 1 times [2023-11-29 00:12:54,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:54,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352004256] [2023-11-29 00:12:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:54,209 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 00:12:54,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:54,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352004256] [2023-11-29 00:12:54,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352004256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:12:54,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:12:54,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:12:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236788993] [2023-11-29 00:12:54,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:12:54,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:12:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:12:54,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:12:54,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2023-11-29 00:12:54,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 00:12:54,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:54,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2023-11-29 00:12:54,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:54,275 INFO L124 PetriNetUnfolderBase]: 140/272 cut-off events. [2023-11-29 00:12:54,275 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 00:12:54,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 272 events. 140/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1219 event pairs, 130 based on Foata normal form. 35/294 useless extension candidates. Maximal degree in co-relation 526. Up to 248 conditions per place. [2023-11-29 00:12:54,278 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 18 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-29 00:12:54,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 103 flow [2023-11-29 00:12:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:12:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:12:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-29 00:12:54,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2023-11-29 00:12:54,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-29 00:12:54,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-29 00:12:54,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:12:54,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-29 00:12:54,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 00:12:54,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 00:12:54,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 00:12:54,283 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 71 flow. Second operand 3 states and 71 transitions. [2023-11-29 00:12:54,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 103 flow [2023-11-29 00:12:54,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 28 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:12:54,285 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 66 flow [2023-11-29 00:12:54,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-11-29 00:12:54,286 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -9 predicate places. [2023-11-29 00:12:54,286 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 66 flow [2023-11-29 00:12:54,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 00:12:54,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:54,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:12:54,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:12:54,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 00:12:54,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:54,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1180579848, now seen corresponding path program 1 times [2023-11-29 00:12:54,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:54,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355658129] [2023-11-29 00:12:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:54,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:12:54,307 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:12:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:12:54,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:12:54,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:12:54,341 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-29 00:12:54,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-29 00:12:54,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-29 00:12:54,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-29 00:12:54,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-29 00:12:54,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2023-11-29 00:12:54,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-29 00:12:54,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2023-11-29 00:12:54,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-29 00:12:54,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:12:54,345 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 00:12:54,348 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:12:54,348 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 00:12:54,376 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 00:12:54,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 71 transitions, 162 flow [2023-11-29 00:12:54,389 INFO L124 PetriNetUnfolderBase]: 5/70 cut-off events. [2023-11-29 00:12:54,389 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:12:54,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 70 events. 5/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 202 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 77. Up to 3 conditions per place. [2023-11-29 00:12:54,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 71 transitions, 162 flow [2023-11-29 00:12:54,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 55 transitions, 123 flow [2023-11-29 00:12:54,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:12:54,394 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;@20f32da2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:12:54,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-29 00:12:54,395 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:12:54,395 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 00:12:54,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:12:54,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:54,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:12:54,396 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 00:12:54,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash 10992, now seen corresponding path program 1 times [2023-11-29 00:12:54,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:54,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470614157] [2023-11-29 00:12:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:54,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:54,428 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 00:12:54,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470614157] [2023-11-29 00:12:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470614157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:12:54,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:12:54,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:12:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203418620] [2023-11-29 00:12:54,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:12:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:12:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:54,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:12:54,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:12:54,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2023-11-29 00:12:54,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 123 flow. Second operand has 3 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 00:12:54,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:54,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2023-11-29 00:12:54,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:55,349 INFO L124 PetriNetUnfolderBase]: 5162/7563 cut-off events. [2023-11-29 00:12:55,350 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2023-11-29 00:12:55,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15001 conditions, 7563 events. 5162/7563 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45715 event pairs, 4793 based on Foata normal form. 1594/8736 useless extension candidates. Maximal degree in co-relation 14987. Up to 7291 conditions per place. [2023-11-29 00:12:55,423 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 33 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-29 00:12:55,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 173 flow [2023-11-29 00:12:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:12:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:12:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-29 00:12:55,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835680751173709 [2023-11-29 00:12:55,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-29 00:12:55,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-29 00:12:55,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:12:55,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-29 00:12:55,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 00:12:55,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 00:12:55,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 00:12:55,428 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 123 flow. Second operand 3 states and 103 transitions. [2023-11-29 00:12:55,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 173 flow [2023-11-29 00:12:55,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:12:55,431 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 106 flow [2023-11-29 00:12:55,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=106, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-29 00:12:55,432 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2023-11-29 00:12:55,432 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 106 flow [2023-11-29 00:12:55,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 00:12:55,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:55,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:12:55,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:12:55,433 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 00:12:55,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash 10993, now seen corresponding path program 1 times [2023-11-29 00:12:55,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:55,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905546156] [2023-11-29 00:12:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:55,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:55,478 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 00:12:55,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:55,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905546156] [2023-11-29 00:12:55,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905546156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:12:55,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:12:55,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:12:55,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266811532] [2023-11-29 00:12:55,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:12:55,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:12:55,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:12:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:12:55,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 71 [2023-11-29 00:12:55,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 00:12:55,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:55,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 71 [2023-11-29 00:12:55,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:56,054 INFO L124 PetriNetUnfolderBase]: 3751/5527 cut-off events. [2023-11-29 00:12:56,055 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-11-29 00:12:56,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 5527 events. 3751/5527 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32188 event pairs, 3474 based on Foata normal form. 533/5743 useless extension candidates. Maximal degree in co-relation 11014. Up to 5347 conditions per place. [2023-11-29 00:12:56,099 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 31 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-29 00:12:56,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 166 flow [2023-11-29 00:12:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:12:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:12:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-29 00:12:56,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835680751173709 [2023-11-29 00:12:56,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-29 00:12:56,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-29 00:12:56,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:12:56,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-29 00:12:56,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 00:12:56,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 00:12:56,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 00:12:56,104 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 106 flow. Second operand 3 states and 103 transitions. [2023-11-29 00:12:56,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 166 flow [2023-11-29 00:12:56,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:12:56,107 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 103 flow [2023-11-29 00:12:56,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-29 00:12:56,108 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2023-11-29 00:12:56,108 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 103 flow [2023-11-29 00:12:56,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 00:12:56,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:56,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:12:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:12:56,109 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 00:12:56,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 316070087, now seen corresponding path program 1 times [2023-11-29 00:12:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:56,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556432720] [2023-11-29 00:12:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:56,147 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 00:12:56,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556432720] [2023-11-29 00:12:56,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556432720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:12:56,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:12:56,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:12:56,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752001106] [2023-11-29 00:12:56,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:12:56,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:12:56,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:12:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:12:56,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 71 [2023-11-29 00:12:56,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 00:12:56,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:56,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 71 [2023-11-29 00:12:56,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:12:56,558 INFO L124 PetriNetUnfolderBase]: 2714/4046 cut-off events. [2023-11-29 00:12:56,558 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-29 00:12:56,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8071 conditions, 4046 events. 2714/4046 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22859 event pairs, 2506 based on Foata normal form. 398/4206 useless extension candidates. Maximal degree in co-relation 8062. Up to 3911 conditions per place. [2023-11-29 00:12:56,586 INFO L140 encePairwiseOnDemand]: 69/71 looper letters, 30 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-29 00:12:56,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 41 transitions, 159 flow [2023-11-29 00:12:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:12:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:12:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-29 00:12:56,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023474178403756 [2023-11-29 00:12:56,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-29 00:12:56,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-29 00:12:56,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:12:56,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-29 00:12:56,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 00:12:56,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 00:12:56,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 00:12:56,590 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 103 flow. Second operand 3 states and 107 transitions. [2023-11-29 00:12:56,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 41 transitions, 159 flow [2023-11-29 00:12:56,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:12:56,592 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 98 flow [2023-11-29 00:12:56,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-11-29 00:12:56,593 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -9 predicate places. [2023-11-29 00:12:56,593 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 98 flow [2023-11-29 00:12:56,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 00:12:56,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:56,594 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:12:56,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:12:56,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 00:12:56,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash -572774534, now seen corresponding path program 1 times [2023-11-29 00:12:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:56,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727153757] [2023-11-29 00:12:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:56,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:12:56,611 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:12:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:12:56,627 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:12:56,627 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:12:56,627 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-29 00:12:56,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-11-29 00:12:56,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-29 00:12:56,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-29 00:12:56,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-29 00:12:56,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-29 00:12:56,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-29 00:12:56,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-11-29 00:12:56,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-29 00:12:56,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-29 00:12:56,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:12:56,629 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 00:12:56,630 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:12:56,630 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 00:12:56,669 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 00:12:56,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 234 flow [2023-11-29 00:12:56,681 INFO L124 PetriNetUnfolderBase]: 6/91 cut-off events. [2023-11-29 00:12:56,682 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 00:12:56,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 91 events. 6/91 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 275 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 102. Up to 4 conditions per place. [2023-11-29 00:12:56,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 99 transitions, 234 flow [2023-11-29 00:12:56,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 68 transitions, 157 flow [2023-11-29 00:12:56,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:12:56,686 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;@20f32da2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:12:56,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-29 00:12:56,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:12:56,687 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 00:12:56,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:12:56,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:56,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:12:56,688 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 00:12:56,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 14160, now seen corresponding path program 1 times [2023-11-29 00:12:56,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:56,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865929610] [2023-11-29 00:12:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:56,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:56,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:56,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865929610] [2023-11-29 00:12:56,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865929610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:12:56,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:12:56,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:12:56,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715772650] [2023-11-29 00:12:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:12:56,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:12:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:12:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:12:56,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 99 [2023-11-29 00:12:56,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:12:56,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:56,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 99 [2023-11-29 00:12:56,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:13:04,197 INFO L124 PetriNetUnfolderBase]: 80182/106367 cut-off events. [2023-11-29 00:13:04,197 INFO L125 PetriNetUnfolderBase]: For 3604/3604 co-relation queries the response was YES. [2023-11-29 00:13:04,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212058 conditions, 106367 events. 80182/106367 cut-off events. For 3604/3604 co-relation queries the response was YES. Maximal size of possible extension queue 3829. Compared 702639 event pairs, 74005 based on Foata normal form. 17566/117176 useless extension candidates. Maximal degree in co-relation 212043. Up to 103607 conditions per place. [2023-11-29 00:13:04,862 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 45 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-11-29 00:13:04,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 231 flow [2023-11-29 00:13:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:13:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:13:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-29 00:13:04,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2023-11-29 00:13:04,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-29 00:13:04,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-29 00:13:04,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:13:04,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-29 00:13:04,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 00:13:04,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 00:13:04,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 00:13:04,867 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 157 flow. Second operand 3 states and 139 transitions. [2023-11-29 00:13:04,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 231 flow [2023-11-29 00:13:04,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 228 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:13:04,873 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 138 flow [2023-11-29 00:13:04,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-29 00:13:04,874 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2023-11-29 00:13:04,874 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 138 flow [2023-11-29 00:13:04,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:13:04,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:13:04,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:13:04,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:13:04,875 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 00:13:04,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:04,876 INFO L85 PathProgramCache]: Analyzing trace with hash 14161, now seen corresponding path program 1 times [2023-11-29 00:13:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:04,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134554287] [2023-11-29 00:13:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:04,926 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 00:13:04,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134554287] [2023-11-29 00:13:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134554287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:13:04,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:13:04,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:13:04,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528744870] [2023-11-29 00:13:04,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:13:04,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:13:04,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:13:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:13:04,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 99 [2023-11-29 00:13:04,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:13:04,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:13:04,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 99 [2023-11-29 00:13:04,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:13:10,162 INFO L124 PetriNetUnfolderBase]: 58806/78142 cut-off events. [2023-11-29 00:13:10,162 INFO L125 PetriNetUnfolderBase]: For 1600/1600 co-relation queries the response was YES. [2023-11-29 00:13:10,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156117 conditions, 78142 events. 58806/78142 cut-off events. For 1600/1600 co-relation queries the response was YES. Maximal size of possible extension queue 2870. Compared 502291 event pairs, 54173 based on Foata normal form. 5857/78906 useless extension candidates. Maximal degree in co-relation 156108. Up to 76374 conditions per place. [2023-11-29 00:13:10,539 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 43 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-29 00:13:10,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 222 flow [2023-11-29 00:13:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:13:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:13:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-29 00:13:10,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2023-11-29 00:13:10,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-29 00:13:10,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-29 00:13:10,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:13:10,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-29 00:13:10,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 00:13:10,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 00:13:10,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 00:13:10,542 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 138 flow. Second operand 3 states and 139 transitions. [2023-11-29 00:13:10,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 222 flow [2023-11-29 00:13:10,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:13:10,546 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 135 flow [2023-11-29 00:13:10,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-11-29 00:13:10,547 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2023-11-29 00:13:10,547 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 135 flow [2023-11-29 00:13:10,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:13:10,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:13:10,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:10,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:13:10,548 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 00:13:10,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1312121049, now seen corresponding path program 1 times [2023-11-29 00:13:10,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:10,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204474416] [2023-11-29 00:13:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:10,576 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 00:13:10,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204474416] [2023-11-29 00:13:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204474416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:13:10,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:13:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:13:10,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594282444] [2023-11-29 00:13:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:13:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:13:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:13:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:13:10,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 99 [2023-11-29 00:13:10,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 00:13:10,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:13:10,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 99 [2023-11-29 00:13:10,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:13:14,401 INFO L124 PetriNetUnfolderBase]: 43007/57509 cut-off events. [2023-11-29 00:13:14,402 INFO L125 PetriNetUnfolderBase]: For 1200/1200 co-relation queries the response was YES. [2023-11-29 00:13:14,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114896 conditions, 57509 events. 43007/57509 cut-off events. For 1200/1200 co-relation queries the response was YES. Maximal size of possible extension queue 2242. Compared 363507 event pairs, 39532 based on Foata normal form. 4391/58080 useless extension candidates. Maximal degree in co-relation 114886. Up to 56183 conditions per place. [2023-11-29 00:13:14,671 INFO L140 encePairwiseOnDemand]: 97/99 looper letters, 42 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-29 00:13:14,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 215 flow [2023-11-29 00:13:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:13:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:13:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-29 00:13:14,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-29 00:13:14,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-29 00:13:14,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-29 00:13:14,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:13:14,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-29 00:13:14,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 00:13:14,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 00:13:14,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 00:13:14,675 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 135 flow. Second operand 3 states and 143 transitions. [2023-11-29 00:13:14,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 215 flow [2023-11-29 00:13:14,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:13:14,678 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 130 flow [2023-11-29 00:13:14,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2023-11-29 00:13:14,679 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2023-11-29 00:13:14,679 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 130 flow [2023-11-29 00:13:14,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 00:13:14,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:13:14,679 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:13:14,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 00:13:14,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:13:14,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:14,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1223870257, now seen corresponding path program 1 times [2023-11-29 00:13:14,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:14,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776723259] [2023-11-29 00:13:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:14,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:13:14,696 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:13:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:13:14,713 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:13:14,713 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:13:14,713 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-11-29 00:13:14,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2023-11-29 00:13:14,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-11-29 00:13:14,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-11-29 00:13:14,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-11-29 00:13:14,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-11-29 00:13:14,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-11-29 00:13:14,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 11 remaining) [2023-11-29 00:13:14,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2023-11-29 00:13:14,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2023-11-29 00:13:14,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-11-29 00:13:14,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 00:13:14,715 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 00:13:14,715 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:13:14,715 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 00:13:14,756 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 00:13:14,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 127 transitions, 310 flow [2023-11-29 00:13:14,768 INFO L124 PetriNetUnfolderBase]: 7/112 cut-off events. [2023-11-29 00:13:14,768 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 00:13:14,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 112 events. 7/112 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 349 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 128. Up to 5 conditions per place. [2023-11-29 00:13:14,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 127 transitions, 310 flow [2023-11-29 00:13:14,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 81 transitions, 193 flow [2023-11-29 00:13:14,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:13:14,771 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;@20f32da2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:13:14,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-29 00:13:14,773 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:13:14,773 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 00:13:14,773 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:13:14,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:13:14,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 00:13:14,774 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 00:13:14,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:13:14,774 INFO L85 PathProgramCache]: Analyzing trace with hash 18224, now seen corresponding path program 1 times [2023-11-29 00:13:14,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:13:14,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443681166] [2023-11-29 00:13:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:13:14,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:13:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:13:14,792 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 00:13:14,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:13:14,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443681166] [2023-11-29 00:13:14,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443681166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:13:14,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:13:14,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:13:14,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783117546] [2023-11-29 00:13:14,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:13:14,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:13:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:13:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:13:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:13:14,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 127 [2023-11-29 00:13:14,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 193 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 00:13:14,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:13:14,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 127 [2023-11-29 00:13:14,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand