./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/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_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/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_ee0f1775-fa57-46c1-bb64-560c0556f7b5/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 d59c014df9ead169c56b7ae39b852ef0f17fdf8c183ee9a03f7bf209d03f772f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:55:39,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:55:39,870 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 01:55:39,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:55:39,875 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:55:39,899 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:55:39,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:55:39,900 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:55:39,901 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:55:39,901 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:55:39,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:55:39,902 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:55:39,903 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:55:39,903 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:55:39,904 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:55:39,904 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:55:39,905 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:55:39,905 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:55:39,906 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:55:39,906 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:55:39,907 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 01:55:39,909 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 01:55:39,910 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 01:55:39,910 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:55:39,911 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 01:55:39,911 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:55:39,912 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:55:39,912 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:55:39,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:55:39,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:55:39,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:55:39,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:55:39,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:55:39,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:55:39,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:55:39,914 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:55:39,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:55:39,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:55:39,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:55:39,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:55:39,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:55:39,916 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_ee0f1775-fa57-46c1-bb64-560c0556f7b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d59c014df9ead169c56b7ae39b852ef0f17fdf8c183ee9a03f7bf209d03f772f [2023-11-29 01:55:40,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:55:40,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:55:40,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:55:40,157 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:55:40,157 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:55:40,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-29 01:55:42,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:55:43,178 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:55:43,178 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-29 01:55:43,194 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/data/24926fa09/415f466983eb429582e2a5dfe83664b6/FLAG951cd7071 [2023-11-29 01:55:43,210 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/data/24926fa09/415f466983eb429582e2a5dfe83664b6 [2023-11-29 01:55:43,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:55:43,214 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:55:43,215 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:55:43,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:55:43,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:55:43,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42ae814d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43, skipping insertion in model container [2023-11-29 01:55:43,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,268 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:55:43,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:55:43,593 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:55:43,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:55:43,672 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:55:43,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43 WrapperNode [2023-11-29 01:55:43,673 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:55:43,674 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:55:43,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:55:43,674 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:55:43,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,719 INFO L138 Inliner]: procedures = 165, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 91 [2023-11-29 01:55:43,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:55:43,720 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:55:43,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:55:43,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:55:43,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,734 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,749 INFO L175 MemorySlicer]: Split 15 memory accesses to 4 slices as follows [2, 1, 5, 7]. 47 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 0, 5, 1]. The 3 writes are split as follows [0, 1, 0, 2]. [2023-11-29 01:55:43,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,760 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,762 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,764 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:55:43,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:55:43,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:55:43,769 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:55:43,769 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (1/1) ... [2023-11-29 01:55:43,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:55:43,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:43,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:55:43,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee0f1775-fa57-46c1-bb64-560c0556f7b5/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:55:43,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:55:43,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:55:43,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:55:43,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:55:43,847 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 01:55:43,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 01:55:43,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:55:43,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:55:43,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:55:43,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:55:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 01:55:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:55:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:55:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:55:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:55:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:55:43,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:55:43,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:55:43,849 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 01:55:43,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:55:43,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:55:43,851 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 01:55:43,990 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:55:43,992 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:55:44,211 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:55:44,359 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:55:44,360 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 01:55:44,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:55:44 BoogieIcfgContainer [2023-11-29 01:55:44,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:55:44,364 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:55:44,364 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:55:44,367 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:55:44,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:55:43" (1/3) ... [2023-11-29 01:55:44,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f69d73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:55:44, skipping insertion in model container [2023-11-29 01:55:44,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:43" (2/3) ... [2023-11-29 01:55:44,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f69d73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:55:44, skipping insertion in model container [2023-11-29 01:55:44,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:55:44" (3/3) ... [2023-11-29 01:55:44,371 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur-pthread.i [2023-11-29 01:55:44,392 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:55:44,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-29 01:55:44,392 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:55:44,454 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:55:44,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 53 transitions, 110 flow [2023-11-29 01:55:44,526 INFO L124 PetriNetUnfolderBase]: 4/60 cut-off events. [2023-11-29 01:55:44,526 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:55:44,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 60 events. 4/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 162 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-29 01:55:44,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 53 transitions, 110 flow [2023-11-29 01:55:44,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 53 transitions, 110 flow [2023-11-29 01:55:44,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:55:44,552 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;@72229797, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:55:44,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-29 01:55:44,556 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:55:44,557 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:55:44,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:55:44,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:44,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:55:44,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 01:55:44,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash 317003, now seen corresponding path program 1 times [2023-11-29 01:55:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:44,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540589408] [2023-11-29 01:55:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:44,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:44,811 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 01:55:44,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:44,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540589408] [2023-11-29 01:55:44,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540589408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:44,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:44,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:44,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659456785] [2023-11-29 01:55:44,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:44,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:44,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2023-11-29 01:55:44,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:44,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:44,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2023-11-29 01:55:44,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:45,054 INFO L124 PetriNetUnfolderBase]: 111/415 cut-off events. [2023-11-29 01:55:45,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:55:45,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 415 events. 111/415 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1780 event pairs, 55 based on Foata normal form. 11/308 useless extension candidates. Maximal degree in co-relation 659. Up to 141 conditions per place. [2023-11-29 01:55:45,061 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 40 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-11-29 01:55:45,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 220 flow [2023-11-29 01:55:45,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-29 01:55:45,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7735849056603774 [2023-11-29 01:55:45,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-29 01:55:45,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-29 01:55:45,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:45,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-29 01:55:45,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 01:55:45,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,089 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 110 flow. Second operand 3 states and 123 transitions. [2023-11-29 01:55:45,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 220 flow [2023-11-29 01:55:45,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:55:45,096 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 116 flow [2023-11-29 01:55:45,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-29 01:55:45,101 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-29 01:55:45,102 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 116 flow [2023-11-29 01:55:45,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:45,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:45,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:55:45,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:55:45,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 01:55:45,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash 317004, now seen corresponding path program 1 times [2023-11-29 01:55:45,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:45,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994102807] [2023-11-29 01:55:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:45,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:45,217 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 01:55:45,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:45,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994102807] [2023-11-29 01:55:45,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994102807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:45,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:45,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:45,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317884731] [2023-11-29 01:55:45,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:45,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:45,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 53 [2023-11-29 01:55:45,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:45,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:45,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 53 [2023-11-29 01:55:45,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:45,334 INFO L124 PetriNetUnfolderBase]: 66/305 cut-off events. [2023-11-29 01:55:45,334 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-29 01:55:45,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 305 events. 66/305 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1186 event pairs, 60 based on Foata normal form. 32/258 useless extension candidates. Maximal degree in co-relation 493. Up to 178 conditions per place. [2023-11-29 01:55:45,338 INFO L140 encePairwiseOnDemand]: 51/53 looper letters, 21 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-29 01:55:45,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 158 flow [2023-11-29 01:55:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2023-11-29 01:55:45,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911949685534591 [2023-11-29 01:55:45,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2023-11-29 01:55:45,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2023-11-29 01:55:45,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:45,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2023-11-29 01:55:45,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:45,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,343 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 116 flow. Second operand 3 states and 94 transitions. [2023-11-29 01:55:45,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 158 flow [2023-11-29 01:55:45,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:55:45,347 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 110 flow [2023-11-29 01:55:45,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, 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=110, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-29 01:55:45,348 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-11-29 01:55:45,348 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 110 flow [2023-11-29 01:55:45,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:45,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:45,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:45,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:55:45,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 01:55:45,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 711052004, now seen corresponding path program 1 times [2023-11-29 01:55:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845439084] [2023-11-29 01:55:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:45,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:45,475 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 01:55:45,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845439084] [2023-11-29 01:55:45,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845439084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:45,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:45,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:45,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171534885] [2023-11-29 01:55:45,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:45,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:45,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:45,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:45,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:45,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2023-11-29 01:55:45,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:45,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:45,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2023-11-29 01:55:45,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:45,583 INFO L124 PetriNetUnfolderBase]: 58/253 cut-off events. [2023-11-29 01:55:45,583 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 01:55:45,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 253 events. 58/253 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 836 event pairs, 8 based on Foata normal form. 21/236 useless extension candidates. Maximal degree in co-relation 423. Up to 121 conditions per place. [2023-11-29 01:55:45,586 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 19 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-11-29 01:55:45,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 146 flow [2023-11-29 01:55:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-29 01:55:45,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2023-11-29 01:55:45,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-29 01:55:45,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-29 01:55:45,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:45,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-29 01:55:45,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 01:55:45,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,591 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 110 flow. Second operand 3 states and 90 transitions. [2023-11-29 01:55:45,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 146 flow [2023-11-29 01:55:45,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:55:45,594 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 103 flow [2023-11-29 01:55:45,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-29 01:55:45,595 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-11-29 01:55:45,595 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 103 flow [2023-11-29 01:55:45,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:45,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:45,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:45,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:55:45,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 01:55:45,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:45,596 INFO L85 PathProgramCache]: Analyzing trace with hash 711052001, now seen corresponding path program 1 times [2023-11-29 01:55:45,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:45,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967140367] [2023-11-29 01:55:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:45,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:45,635 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 01:55:45,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:45,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967140367] [2023-11-29 01:55:45,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967140367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:45,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:45,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:45,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964108995] [2023-11-29 01:55:45,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:45,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:45,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:45,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:45,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:45,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 53 [2023-11-29 01:55:45,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 01:55:45,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:45,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 53 [2023-11-29 01:55:45,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:45,710 INFO L124 PetriNetUnfolderBase]: 56/250 cut-off events. [2023-11-29 01:55:45,710 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-29 01:55:45,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 250 events. 56/250 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 829 event pairs, 4 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 433. Up to 137 conditions per place. [2023-11-29 01:55:45,713 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 23 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-29 01:55:45,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 165 flow [2023-11-29 01:55:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2023-11-29 01:55:45,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2023-11-29 01:55:45,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2023-11-29 01:55:45,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2023-11-29 01:55:45,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:45,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2023-11-29 01:55:45,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:45,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,718 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 103 flow. Second operand 3 states and 100 transitions. [2023-11-29 01:55:45,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 165 flow [2023-11-29 01:55:45,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 157 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:55:45,720 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 109 flow [2023-11-29 01:55:45,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-29 01:55:45,722 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-11-29 01:55:45,722 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 109 flow [2023-11-29 01:55:45,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 01:55:45,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:45,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:45,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:55:45,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 01:55:45,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:45,723 INFO L85 PathProgramCache]: Analyzing trace with hash 711052003, now seen corresponding path program 1 times [2023-11-29 01:55:45,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:45,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540458647] [2023-11-29 01:55:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:45,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:45,782 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 01:55:45,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:45,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540458647] [2023-11-29 01:55:45,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540458647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:45,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:45,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:45,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019893814] [2023-11-29 01:55:45,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:45,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:45,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:45,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:45,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:45,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2023-11-29 01:55:45,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 01:55:45,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:45,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2023-11-29 01:55:45,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:45,871 INFO L124 PetriNetUnfolderBase]: 62/215 cut-off events. [2023-11-29 01:55:45,871 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 01:55:45,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 215 events. 62/215 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 557 event pairs, 8 based on Foata normal form. 7/219 useless extension candidates. Maximal degree in co-relation 406. Up to 132 conditions per place. [2023-11-29 01:55:45,873 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 21 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-11-29 01:55:45,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 147 flow [2023-11-29 01:55:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-29 01:55:45,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2023-11-29 01:55:45,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-29 01:55:45,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-29 01:55:45,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:45,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-29 01:55:45,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 01:55:45,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 01:55:45,877 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 109 flow. Second operand 3 states and 82 transitions. [2023-11-29 01:55:45,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 147 flow [2023-11-29 01:55:45,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:55:45,879 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 99 flow [2023-11-29 01:55:45,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-29 01:55:45,880 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -11 predicate places. [2023-11-29 01:55:45,880 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 99 flow [2023-11-29 01:55:45,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 01:55:45,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:45,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 01:55:45,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:55:45,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 01:55:45,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash 567016496, now seen corresponding path program 1 times [2023-11-29 01:55:45,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:45,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023234104] [2023-11-29 01:55:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:45,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:55:45,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:55:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:55:45,923 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:55:45,923 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:55:45,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2023-11-29 01:55:45,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2023-11-29 01:55:45,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2023-11-29 01:55:45,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2023-11-29 01:55:45,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2023-11-29 01:55:45,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2023-11-29 01:55:45,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2023-11-29 01:55:45,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2023-11-29 01:55:45,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2023-11-29 01:55:45,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (24 of 34 remaining) [2023-11-29 01:55:45,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2023-11-29 01:55:45,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2023-11-29 01:55:45,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (21 of 34 remaining) [2023-11-29 01:55:45,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (20 of 34 remaining) [2023-11-29 01:55:45,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2023-11-29 01:55:45,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2023-11-29 01:55:45,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2023-11-29 01:55:45,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2023-11-29 01:55:45,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (15 of 34 remaining) [2023-11-29 01:55:45,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2023-11-29 01:55:45,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2023-11-29 01:55:45,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2023-11-29 01:55:45,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2023-11-29 01:55:45,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2023-11-29 01:55:45,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2023-11-29 01:55:45,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2023-11-29 01:55:45,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2023-11-29 01:55:45,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 34 remaining) [2023-11-29 01:55:45,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2023-11-29 01:55:45,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2023-11-29 01:55:45,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 34 remaining) [2023-11-29 01:55:45,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 34 remaining) [2023-11-29 01:55:45,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 34 remaining) [2023-11-29 01:55:45,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 34 remaining) [2023-11-29 01:55:45,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 01:55:45,933 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-29 01:55:45,935 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:55:45,935 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 01:55:45,984 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:55:45,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 202 flow [2023-11-29 01:55:46,001 INFO L124 PetriNetUnfolderBase]: 8/111 cut-off events. [2023-11-29 01:55:46,001 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 01:55:46,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 111 events. 8/111 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 422 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 92. Up to 3 conditions per place. [2023-11-29 01:55:46,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 96 transitions, 202 flow [2023-11-29 01:55:46,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 96 transitions, 202 flow [2023-11-29 01:55:46,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:55:46,007 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;@72229797, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:55:46,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-11-29 01:55:46,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:55:46,008 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:55:46,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:55:46,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:46,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:55:46,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:46,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:46,009 INFO L85 PathProgramCache]: Analyzing trace with hash 412331, now seen corresponding path program 1 times [2023-11-29 01:55:46,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:46,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163422936] [2023-11-29 01:55:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:46,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:46,036 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 01:55:46,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:46,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163422936] [2023-11-29 01:55:46,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163422936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:46,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:46,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:46,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122607109] [2023-11-29 01:55:46,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:46,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:46,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:46,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:46,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 96 [2023-11-29 01:55:46,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 96 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:46,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:46,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 96 [2023-11-29 01:55:46,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:47,309 INFO L124 PetriNetUnfolderBase]: 4889/11175 cut-off events. [2023-11-29 01:55:47,310 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-11-29 01:55:47,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19018 conditions, 11175 events. 4889/11175 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 95942 event pairs, 1948 based on Foata normal form. 513/8788 useless extension candidates. Maximal degree in co-relation 11033. Up to 4489 conditions per place. [2023-11-29 01:55:47,409 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 75 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-11-29 01:55:47,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 415 flow [2023-11-29 01:55:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-11-29 01:55:47,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7881944444444444 [2023-11-29 01:55:47,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-11-29 01:55:47,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-11-29 01:55:47,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:47,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-11-29 01:55:47,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 01:55:47,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:47,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:47,416 INFO L175 Difference]: Start difference. First operand has 93 places, 96 transitions, 202 flow. Second operand 3 states and 227 transitions. [2023-11-29 01:55:47,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 415 flow [2023-11-29 01:55:47,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 121 transitions, 415 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:55:47,420 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 206 flow [2023-11-29 01:55:47,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2023-11-29 01:55:47,421 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2023-11-29 01:55:47,421 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 206 flow [2023-11-29 01:55:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:47,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:47,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:55:47,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 01:55:47,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:47,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash 412332, now seen corresponding path program 1 times [2023-11-29 01:55:47,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:47,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703383770] [2023-11-29 01:55:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:47,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:47,460 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 01:55:47,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703383770] [2023-11-29 01:55:47,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703383770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:47,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:47,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:47,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921325862] [2023-11-29 01:55:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:47,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:47,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2023-11-29 01:55:47,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 01:55:47,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:47,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2023-11-29 01:55:47,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:48,564 INFO L124 PetriNetUnfolderBase]: 3675/9063 cut-off events. [2023-11-29 01:55:48,564 INFO L125 PetriNetUnfolderBase]: For 861/861 co-relation queries the response was YES. [2023-11-29 01:55:48,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15961 conditions, 9063 events. 3675/9063 cut-off events. For 861/861 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 76484 event pairs, 3225 based on Foata normal form. 607/7513 useless extension candidates. Maximal degree in co-relation 13292. Up to 6094 conditions per place. [2023-11-29 01:55:48,609 INFO L140 encePairwiseOnDemand]: 94/96 looper letters, 40 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-11-29 01:55:48,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 286 flow [2023-11-29 01:55:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-29 01:55:48,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2023-11-29 01:55:48,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-29 01:55:48,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-29 01:55:48,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:48,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-29 01:55:48,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 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 01:55:48,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:48,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:48,613 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 206 flow. Second operand 3 states and 172 transitions. [2023-11-29 01:55:48,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 286 flow [2023-11-29 01:55:48,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:55:48,618 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 198 flow [2023-11-29 01:55:48,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2023-11-29 01:55:48,619 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -4 predicate places. [2023-11-29 01:55:48,619 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 198 flow [2023-11-29 01:55:48,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 01:55:48,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:48,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:48,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 01:55:48,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:48,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1441603135, now seen corresponding path program 1 times [2023-11-29 01:55:48,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:48,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643679837] [2023-11-29 01:55:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:48,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:48,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:48,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643679837] [2023-11-29 01:55:48,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643679837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:48,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:48,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:48,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423421593] [2023-11-29 01:55:48,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:48,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:48,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:48,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:48,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 96 [2023-11-29 01:55:48,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 01:55:48,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:48,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 96 [2023-11-29 01:55:48,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:49,534 INFO L124 PetriNetUnfolderBase]: 3719/9215 cut-off events. [2023-11-29 01:55:49,534 INFO L125 PetriNetUnfolderBase]: For 552/552 co-relation queries the response was YES. [2023-11-29 01:55:49,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15979 conditions, 9215 events. 3719/9215 cut-off events. For 552/552 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 78273 event pairs, 1700 based on Foata normal form. 0/6933 useless extension candidates. Maximal degree in co-relation 15969. Up to 6035 conditions per place. [2023-11-29 01:55:49,569 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 49 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-29 01:55:49,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 96 transitions, 329 flow [2023-11-29 01:55:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-29 01:55:49,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2023-11-29 01:55:49,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-29 01:55:49,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-29 01:55:49,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:49,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-29 01:55:49,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 01:55:49,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:49,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:49,573 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 198 flow. Second operand 3 states and 189 transitions. [2023-11-29 01:55:49,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 96 transitions, 329 flow [2023-11-29 01:55:49,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:55:49,576 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 222 flow [2023-11-29 01:55:49,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2023-11-29 01:55:49,577 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2023-11-29 01:55:49,577 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 222 flow [2023-11-29 01:55:49,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 01:55:49,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:49,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:49,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 01:55:49,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:49,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1441603133, now seen corresponding path program 1 times [2023-11-29 01:55:49,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:49,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849640259] [2023-11-29 01:55:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:49,614 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 01:55:49,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:49,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849640259] [2023-11-29 01:55:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849640259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:49,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:49,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198711819] [2023-11-29 01:55:49,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:49,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:49,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:49,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2023-11-29 01:55:49,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 01:55:49,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:49,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2023-11-29 01:55:49,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:50,796 INFO L124 PetriNetUnfolderBase]: 6025/13336 cut-off events. [2023-11-29 01:55:50,796 INFO L125 PetriNetUnfolderBase]: For 1002/1002 co-relation queries the response was YES. [2023-11-29 01:55:50,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25460 conditions, 13336 events. 6025/13336 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 113340 event pairs, 2251 based on Foata normal form. 0/11021 useless extension candidates. Maximal degree in co-relation 25448. Up to 5122 conditions per place. [2023-11-29 01:55:50,857 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 77 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2023-11-29 01:55:50,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 124 transitions, 496 flow [2023-11-29 01:55:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-11-29 01:55:50,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-29 01:55:50,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-11-29 01:55:50,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-11-29 01:55:50,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:50,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-11-29 01:55:50,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 01:55:50,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:50,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:50,860 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 222 flow. Second operand 3 states and 200 transitions. [2023-11-29 01:55:50,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 124 transitions, 496 flow [2023-11-29 01:55:50,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 124 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:55:50,864 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 317 flow [2023-11-29 01:55:50,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2023-11-29 01:55:50,865 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2023-11-29 01:55:50,865 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 317 flow [2023-11-29 01:55:50,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 01:55:50,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:50,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:50,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 01:55:50,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:50,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:50,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1441603132, now seen corresponding path program 1 times [2023-11-29 01:55:50,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:50,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290461473] [2023-11-29 01:55:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:50,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:50,919 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 01:55:50,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:50,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290461473] [2023-11-29 01:55:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290461473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:50,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:50,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932341352] [2023-11-29 01:55:50,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:50,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:50,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2023-11-29 01:55:50,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:50,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:50,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2023-11-29 01:55:50,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:52,048 INFO L124 PetriNetUnfolderBase]: 4415/10314 cut-off events. [2023-11-29 01:55:52,048 INFO L125 PetriNetUnfolderBase]: For 4480/4540 co-relation queries the response was YES. [2023-11-29 01:55:52,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21672 conditions, 10314 events. 4415/10314 cut-off events. For 4480/4540 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 87111 event pairs, 1628 based on Foata normal form. 1239/10122 useless extension candidates. Maximal degree in co-relation 21659. Up to 5686 conditions per place. [2023-11-29 01:55:52,102 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 64 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2023-11-29 01:55:52,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 506 flow [2023-11-29 01:55:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-11-29 01:55:52,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2023-11-29 01:55:52,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-11-29 01:55:52,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-11-29 01:55:52,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:52,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-11-29 01:55:52,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:52,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:52,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:52,106 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 317 flow. Second operand 3 states and 186 transitions. [2023-11-29 01:55:52,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 506 flow [2023-11-29 01:55:52,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:55:52,117 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 293 flow [2023-11-29 01:55:52,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-11-29 01:55:52,117 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -5 predicate places. [2023-11-29 01:55:52,118 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 293 flow [2023-11-29 01:55:52,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:52,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:52,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:52,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 01:55:52,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:52,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:52,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2096649803, now seen corresponding path program 1 times [2023-11-29 01:55:52,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:52,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390633102] [2023-11-29 01:55:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:52,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:55:52,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:52,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390633102] [2023-11-29 01:55:52,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390633102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:52,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:52,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:52,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337610706] [2023-11-29 01:55:52,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:52,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2023-11-29 01:55:52,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 01:55:52,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:52,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2023-11-29 01:55:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:53,168 INFO L124 PetriNetUnfolderBase]: 3952/9158 cut-off events. [2023-11-29 01:55:53,168 INFO L125 PetriNetUnfolderBase]: For 3905/3957 co-relation queries the response was YES. [2023-11-29 01:55:53,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19022 conditions, 9158 events. 3952/9158 cut-off events. For 3905/3957 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 75151 event pairs, 835 based on Foata normal form. 525/8742 useless extension candidates. Maximal degree in co-relation 19009. Up to 4826 conditions per place. [2023-11-29 01:55:53,209 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 63 selfloop transitions, 5 changer transitions 0/107 dead transitions. [2023-11-29 01:55:53,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 509 flow [2023-11-29 01:55:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-11-29 01:55:53,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6284722222222222 [2023-11-29 01:55:53,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-11-29 01:55:53,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-11-29 01:55:53,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:53,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-11-29 01:55:53,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:53,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:53,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:53,213 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 293 flow. Second operand 3 states and 181 transitions. [2023-11-29 01:55:53,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 509 flow [2023-11-29 01:55:53,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:55:53,220 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 279 flow [2023-11-29 01:55:53,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-11-29 01:55:53,221 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -11 predicate places. [2023-11-29 01:55:53,221 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 279 flow [2023-11-29 01:55:53,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 01:55:53,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:53,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:53,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 01:55:53,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:53,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2096649804, now seen corresponding path program 1 times [2023-11-29 01:55:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:53,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528891614] [2023-11-29 01:55:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:53,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:55:53,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:53,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528891614] [2023-11-29 01:55:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528891614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:53,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:53,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:53,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368220101] [2023-11-29 01:55:53,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:53,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2023-11-29 01:55:53,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 01:55:53,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:53,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2023-11-29 01:55:53,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:54,291 INFO L124 PetriNetUnfolderBase]: 5694/11567 cut-off events. [2023-11-29 01:55:54,291 INFO L125 PetriNetUnfolderBase]: For 4926/4982 co-relation queries the response was YES. [2023-11-29 01:55:54,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25452 conditions, 11567 events. 5694/11567 cut-off events. For 4926/4982 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 89747 event pairs, 1476 based on Foata normal form. 178/11118 useless extension candidates. Maximal degree in co-relation 25439. Up to 5303 conditions per place. [2023-11-29 01:55:54,330 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 76 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2023-11-29 01:55:54,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 599 flow [2023-11-29 01:55:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2023-11-29 01:55:54,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631944444444444 [2023-11-29 01:55:54,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2023-11-29 01:55:54,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2023-11-29 01:55:54,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:54,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2023-11-29 01:55:54,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 01:55:54,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:54,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 01:55:54,334 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 279 flow. Second operand 3 states and 191 transitions. [2023-11-29 01:55:54,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 599 flow [2023-11-29 01:55:54,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 581 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:55:54,340 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 423 flow [2023-11-29 01:55:54,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2023-11-29 01:55:54,341 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2023-11-29 01:55:54,341 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 423 flow [2023-11-29 01:55:54,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 01:55:54,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:54,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:54,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 01:55:54,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:54,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1083656916, now seen corresponding path program 1 times [2023-11-29 01:55:54,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:54,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063718198] [2023-11-29 01:55:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:54,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:54,460 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 01:55:54,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:54,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063718198] [2023-11-29 01:55:54,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063718198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:54,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:54,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:55:54,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221723924] [2023-11-29 01:55:54,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:54,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:55:54,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:55:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:55:54,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 96 [2023-11-29 01:55:54,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 01:55:54,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:54,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 96 [2023-11-29 01:55:54,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:55,521 INFO L124 PetriNetUnfolderBase]: 5309/11410 cut-off events. [2023-11-29 01:55:55,521 INFO L125 PetriNetUnfolderBase]: For 9458/9606 co-relation queries the response was YES. [2023-11-29 01:55:55,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27356 conditions, 11410 events. 5309/11410 cut-off events. For 9458/9606 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 92053 event pairs, 1767 based on Foata normal form. 0/10802 useless extension candidates. Maximal degree in co-relation 27342. Up to 8533 conditions per place. [2023-11-29 01:55:55,570 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 91 selfloop transitions, 10 changer transitions 0/140 dead transitions. [2023-11-29 01:55:55,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 140 transitions, 800 flow [2023-11-29 01:55:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:55:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:55:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2023-11-29 01:55:55,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2023-11-29 01:55:55,572 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 339 transitions. [2023-11-29 01:55:55,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 339 transitions. [2023-11-29 01:55:55,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:55,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 339 transitions. [2023-11-29 01:55:55,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 01:55:55,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 01:55:55,576 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 01:55:55,576 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 423 flow. Second operand 6 states and 339 transitions. [2023-11-29 01:55:55,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 140 transitions, 800 flow [2023-11-29 01:55:55,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 140 transitions, 756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:55:55,592 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 478 flow [2023-11-29 01:55:55,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2023-11-29 01:55:55,593 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2023-11-29 01:55:55,593 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 478 flow [2023-11-29 01:55:55,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 01:55:55,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:55,593 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 01:55:55,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 01:55:55,594 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 01:55:55,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:55,594 INFO L85 PathProgramCache]: Analyzing trace with hash -572393463, now seen corresponding path program 1 times [2023-11-29 01:55:55,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:55,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179802705] [2023-11-29 01:55:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:55,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:55:55,604 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:55:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:55:55,615 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:55:55,615 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:55:55,615 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-11-29 01:55:55,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (39 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (36 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (35 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-11-29 01:55:55,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (30 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-11-29 01:55:55,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (17 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-11-29 01:55:55,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-11-29 01:55:55,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 49 remaining) [2023-11-29 01:55:55,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 49 remaining) [2023-11-29 01:55:55,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-11-29 01:55:55,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2023-11-29 01:55:55,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 01:55:55,621 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:55,622 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:55:55,622 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 01:55:55,674 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:55:55,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 139 transitions, 296 flow [2023-11-29 01:55:55,689 INFO L124 PetriNetUnfolderBase]: 12/162 cut-off events. [2023-11-29 01:55:55,689 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 01:55:55,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 162 events. 12/162 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 711 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 134. Up to 4 conditions per place. [2023-11-29 01:55:55,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 139 transitions, 296 flow [2023-11-29 01:55:55,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 139 transitions, 296 flow [2023-11-29 01:55:55,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:55:55,694 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;@72229797, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:55:55,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-29 01:55:55,695 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:55:55,695 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:55:55,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:55:55,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:55,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:55:55,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 01:55:55,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:55,695 INFO L85 PathProgramCache]: Analyzing trace with hash 550358, now seen corresponding path program 1 times [2023-11-29 01:55:55,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:55,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927283829] [2023-11-29 01:55:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:55,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:55,714 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 01:55:55,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:55,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927283829] [2023-11-29 01:55:55,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927283829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:55,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619209707] [2023-11-29 01:55:55,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:55,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:55,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 139 [2023-11-29 01:55:55,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 139 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 01:55:55,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:55,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 139 [2023-11-29 01:55:55,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:56:15,460 INFO L124 PetriNetUnfolderBase]: 139658/254386 cut-off events. [2023-11-29 01:56:15,460 INFO L125 PetriNetUnfolderBase]: For 11823/11823 co-relation queries the response was YES. [2023-11-29 01:56:15,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448182 conditions, 254386 events. 139658/254386 cut-off events. For 11823/11823 co-relation queries the response was YES. Maximal size of possible extension queue 5686. Compared 2803338 event pairs, 52779 based on Foata normal form. 15005/208262 useless extension candidates. Maximal degree in co-relation 120563. Up to 113226 conditions per place. [2023-11-29 01:56:16,890 INFO L140 encePairwiseOnDemand]: 120/139 looper letters, 110 selfloop transitions, 5 changer transitions 0/177 dead transitions. [2023-11-29 01:56:16,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 614 flow [2023-11-29 01:56:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:56:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-11-29 01:56:16,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7937649880095923 [2023-11-29 01:56:16,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-11-29 01:56:16,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-11-29 01:56:16,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:56:16,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-11-29 01:56:16,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 01:56:16,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 01:56:16,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 01:56:16,897 INFO L175 Difference]: Start difference. First operand has 134 places, 139 transitions, 296 flow. Second operand 3 states and 331 transitions. [2023-11-29 01:56:16,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 614 flow [2023-11-29 01:56:16,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 177 transitions, 610 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-29 01:56:16,903 INFO L231 Difference]: Finished difference. Result has 129 places, 125 transitions, 296 flow [2023-11-29 01:56:16,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2023-11-29 01:56:16,904 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -5 predicate places. [2023-11-29 01:56:16,904 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 296 flow [2023-11-29 01:56:16,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 01:56:16,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:56:16,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:56:16,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 01:56:16,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 01:56:16,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash 550359, now seen corresponding path program 1 times [2023-11-29 01:56:16,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:16,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173801227] [2023-11-29 01:56:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:16,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:16,935 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 01:56:16,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:16,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173801227] [2023-11-29 01:56:16,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173801227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:16,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:16,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:56:16,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106318891] [2023-11-29 01:56:16,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:16,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:16,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:16,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 139 [2023-11-29 01:56:16,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 01:56:16,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:56:16,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 139 [2023-11-29 01:56:16,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:56:34,661 INFO L124 PetriNetUnfolderBase]: 111977/214910 cut-off events. [2023-11-29 01:56:34,661 INFO L125 PetriNetUnfolderBase]: For 23126/23126 co-relation queries the response was YES. [2023-11-29 01:56:35,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390525 conditions, 214910 events. 111977/214910 cut-off events. For 23126/23126 co-relation queries the response was YES. Maximal size of possible extension queue 4512. Compared 2415024 event pairs, 98500 based on Foata normal form. 10974/177261 useless extension candidates. Maximal degree in co-relation 367199. Up to 156403 conditions per place. [2023-11-29 01:56:35,873 INFO L140 encePairwiseOnDemand]: 137/139 looper letters, 59 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2023-11-29 01:56:35,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 124 transitions, 414 flow [2023-11-29 01:56:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:56:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-11-29 01:56:35,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5995203836930456 [2023-11-29 01:56:35,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-11-29 01:56:35,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-11-29 01:56:35,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:56:35,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-11-29 01:56:35,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 01:56:35,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 01:56:35,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 01:56:35,878 INFO L175 Difference]: Start difference. First operand has 129 places, 125 transitions, 296 flow. Second operand 3 states and 250 transitions. [2023-11-29 01:56:35,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 124 transitions, 414 flow [2023-11-29 01:56:35,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 124 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 01:56:35,925 INFO L231 Difference]: Finished difference. Result has 128 places, 124 transitions, 286 flow [2023-11-29 01:56:35,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=128, PETRI_TRANSITIONS=124} [2023-11-29 01:56:35,926 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -6 predicate places. [2023-11-29 01:56:35,926 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 124 transitions, 286 flow [2023-11-29 01:56:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 01:56:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:56:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:35,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 01:56:35,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 01:56:35,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:35,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1480708546, now seen corresponding path program 1 times [2023-11-29 01:56:35,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:35,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510095219] [2023-11-29 01:56:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:35,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:35,947 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 01:56:35,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:35,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510095219] [2023-11-29 01:56:35,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510095219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:35,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:35,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:56:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426611270] [2023-11-29 01:56:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:35,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:35,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 139 [2023-11-29 01:56:35,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 124 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 01:56:35,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:56:35,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 139 [2023-11-29 01:56:35,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:56:53,124 INFO L124 PetriNetUnfolderBase]: 112561/217460 cut-off events. [2023-11-29 01:56:53,124 INFO L125 PetriNetUnfolderBase]: For 14382/14382 co-relation queries the response was YES. [2023-11-29 01:56:53,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388843 conditions, 217460 events. 112561/217460 cut-off events. For 14382/14382 co-relation queries the response was YES. Maximal size of possible extension queue 4582. Compared 2466267 event pairs, 60346 based on Foata normal form. 0/166471 useless extension candidates. Maximal degree in co-relation 388832. Up to 156542 conditions per place. [2023-11-29 01:56:54,352 INFO L140 encePairwiseOnDemand]: 129/139 looper letters, 72 selfloop transitions, 4 changer transitions 0/140 dead transitions. [2023-11-29 01:56:54,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 140 transitions, 480 flow [2023-11-29 01:56:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:56:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-11-29 01:56:54,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657074340527578 [2023-11-29 01:56:54,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-11-29 01:56:54,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-11-29 01:56:54,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:56:54,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-11-29 01:56:54,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 01:56:54,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 01:56:54,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 01:56:54,357 INFO L175 Difference]: Start difference. First operand has 128 places, 124 transitions, 286 flow. Second operand 3 states and 274 transitions. [2023-11-29 01:56:54,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 140 transitions, 480 flow [2023-11-29 01:56:54,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 140 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:56:54,376 INFO L231 Difference]: Finished difference. Result has 130 places, 127 transitions, 321 flow [2023-11-29 01:56:54,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=130, PETRI_TRANSITIONS=127} [2023-11-29 01:56:54,377 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -4 predicate places. [2023-11-29 01:56:54,377 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 127 transitions, 321 flow [2023-11-29 01:56:54,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 01:56:54,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:56:54,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 01:56:54,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 01:56:54,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1480708548, now seen corresponding path program 1 times [2023-11-29 01:56:54,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:54,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17349640] [2023-11-29 01:56:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:54,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:54,415 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 01:56:54,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:54,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17349640] [2023-11-29 01:56:54,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17349640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:54,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:54,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:56:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595547650] [2023-11-29 01:56:54,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:54,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:54,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:54,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 139 [2023-11-29 01:56:54,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 127 transitions, 321 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 01:56:54,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:56:54,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 139 [2023-11-29 01:56:54,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:57:30,008 INFO L124 PetriNetUnfolderBase]: 238143/416980 cut-off events. [2023-11-29 01:57:30,008 INFO L125 PetriNetUnfolderBase]: For 36141/36141 co-relation queries the response was YES. [2023-11-29 01:57:30,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821177 conditions, 416980 events. 238143/416980 cut-off events. For 36141/36141 co-relation queries the response was YES. Maximal size of possible extension queue 8791. Compared 4596211 event pairs, 111219 based on Foata normal form. 0/336001 useless extension candidates. Maximal degree in co-relation 821164. Up to 201453 conditions per place.