./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_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/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_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI --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 [2023-11-24 21:38:32,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:38:32,737 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:38:32,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:38:32,743 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:38:32,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:38:32,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:38:32,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:38:32,775 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:38:32,775 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:38:32,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:38:32,776 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:38:32,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:38:32,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:38:32,779 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:38:32,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:38:32,780 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:38:32,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:38:32,781 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:38:32,781 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:38:32,782 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:38:32,783 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:38:32,783 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:38:32,784 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:38:32,784 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:38:32,785 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:38:32,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:38:32,786 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:38:32,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:38:32,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:38:32,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:38:32,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:38:32,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:38:32,790 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:38:32,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:38:32,791 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:38:32,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:38:32,792 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:38:32,792 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:38:32,793 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:38:32,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:38:32,794 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_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d59c014df9ead169c56b7ae39b852ef0f17fdf8c183ee9a03f7bf209d03f772f [2023-11-24 21:38:33,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:38:33,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:38:33,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:38:33,138 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:38:33,139 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:38:33,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-24 21:38:36,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:38:36,674 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:38:36,678 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-24 21:38:36,702 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/data/08ed037cc/f0a179de30124422b576404f3bb1529b/FLAG7387dc392 [2023-11-24 21:38:36,720 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/data/08ed037cc/f0a179de30124422b576404f3bb1529b [2023-11-24 21:38:36,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:38:36,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:38:36,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:38:36,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:38:36,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:38:36,743 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:38:36" (1/1) ... [2023-11-24 21:38:36,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1635674f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:36, skipping insertion in model container [2023-11-24 21:38:36,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:38:36" (1/1) ... [2023-11-24 21:38:36,808 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:38:37,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:38:37,315 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:38:37,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:38:37,468 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:38:37,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37 WrapperNode [2023-11-24 21:38:37,469 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:38:37,470 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:38:37,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:38:37,471 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:38:37,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,570 INFO L138 Inliner]: procedures = 165, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 91 [2023-11-24 21:38:37,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:38:37,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:38:37,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:38:37,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:38:37,583 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,591 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,620 INFO L175 MemorySlicer]: Split 15 memory accesses to 4 slices as follows [2, 5, 1, 7]. 47 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 5, 0, 1]. The 3 writes are split as follows [0, 0, 1, 2]. [2023-11-24 21:38:37,620 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,638 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,643 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,659 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:38:37,668 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:38:37,669 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:38:37,669 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:38:37,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (1/1) ... [2023-11-24 21:38:37,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:38:37,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:37,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:38:37,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a360729-3bba-4925-8675-c5d9d7a5abce/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:38:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:38:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:38:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:38:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:38:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-24 21:38:37,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-24 21:38:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:38:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:38:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:38:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:38:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:38:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:38:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:38:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:38:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:38:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:38:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:38:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:38:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:38:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:38:37,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:38:37,784 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:38:38,006 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:38:38,009 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:38:38,310 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:38:38,430 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:38:38,430 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:38:38,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:38:38 BoogieIcfgContainer [2023-11-24 21:38:38,431 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:38:38,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:38:38,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:38:38,437 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:38:38,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:38:36" (1/3) ... [2023-11-24 21:38:38,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73766111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:38:38, skipping insertion in model container [2023-11-24 21:38:38,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:37" (2/3) ... [2023-11-24 21:38:38,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73766111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:38:38, skipping insertion in model container [2023-11-24 21:38:38,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:38:38" (3/3) ... [2023-11-24 21:38:38,440 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur-pthread.i [2023-11-24 21:38:38,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:38:38,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-24 21:38:38,461 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:38:38,516 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:38:38,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 53 transitions, 110 flow [2023-11-24 21:38:38,589 INFO L124 PetriNetUnfolderBase]: 4/60 cut-off events. [2023-11-24 21:38:38,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:38:38,592 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. [2023-11-24 21:38:38,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 53 transitions, 110 flow [2023-11-24 21:38:38,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 53 transitions, 110 flow [2023-11-24 21:38:38,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:38:38,615 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;@21c46ffa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:38:38,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-24 21:38:38,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:38:38,620 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:38:38,620 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:38:38,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:38,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:38:38,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-24 21:38:38,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:38,627 INFO L85 PathProgramCache]: Analyzing trace with hash 317003, now seen corresponding path program 1 times [2023-11-24 21:38:38,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:38,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082706301] [2023-11-24 21:38:38,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:38,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:38,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:38,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082706301] [2023-11-24 21:38:38,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082706301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:38,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:38,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:38:38,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811509877] [2023-11-24 21:38:38,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:38,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:38,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:38,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:38,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 53 [2023-11-24 21:38:38,992 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) [2023-11-24 21:38:38,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:38,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 53 [2023-11-24 21:38:38,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:39,265 INFO L124 PetriNetUnfolderBase]: 111/415 cut-off events. [2023-11-24 21:38:39,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:38:39,268 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. [2023-11-24 21:38:39,273 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 40 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-11-24 21:38:39,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 220 flow [2023-11-24 21:38:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-24 21:38:39,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7735849056603774 [2023-11-24 21:38:39,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-24 21:38:39,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-24 21:38:39,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:39,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-24 21:38:39,294 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) [2023-11-24 21:38:39,297 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) [2023-11-24 21:38:39,298 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) [2023-11-24 21:38:39,300 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 110 flow. Second operand 3 states and 123 transitions. [2023-11-24 21:38:39,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 220 flow [2023-11-24 21:38:39,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:38:39,307 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 116 flow [2023-11-24 21:38:39,313 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} [2023-11-24 21:38:39,320 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-24 21:38:39,320 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 116 flow [2023-11-24 21:38:39,321 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) [2023-11-24 21:38:39,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:39,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:38:39,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:38:39,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-24 21:38:39,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 317004, now seen corresponding path program 1 times [2023-11-24 21:38:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:39,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089264413] [2023-11-24 21:38:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:39,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:39,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089264413] [2023-11-24 21:38:39,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089264413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:39,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:39,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:38:39,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684683044] [2023-11-24 21:38:39,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:39,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 53 [2023-11-24 21:38:39,516 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) [2023-11-24 21:38:39,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:39,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 53 [2023-11-24 21:38:39,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:39,609 INFO L124 PetriNetUnfolderBase]: 66/305 cut-off events. [2023-11-24 21:38:39,609 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-24 21:38:39,611 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. [2023-11-24 21:38:39,613 INFO L140 encePairwiseOnDemand]: 51/53 looper letters, 21 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-24 21:38:39,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 158 flow [2023-11-24 21:38:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2023-11-24 21:38:39,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911949685534591 [2023-11-24 21:38:39,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2023-11-24 21:38:39,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2023-11-24 21:38:39,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:39,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2023-11-24 21:38:39,618 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) [2023-11-24 21:38:39,619 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) [2023-11-24 21:38:39,619 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) [2023-11-24 21:38:39,619 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 116 flow. Second operand 3 states and 94 transitions. [2023-11-24 21:38:39,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 158 flow [2023-11-24 21:38:39,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:39,622 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 110 flow [2023-11-24 21:38:39,623 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} [2023-11-24 21:38:39,624 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-11-24 21:38:39,624 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 110 flow [2023-11-24 21:38:39,624 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) [2023-11-24 21:38:39,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:39,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:38:39,625 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-24 21:38:39,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash 711052004, now seen corresponding path program 1 times [2023-11-24 21:38:39,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:39,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140200763] [2023-11-24 21:38:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:39,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:39,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:39,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140200763] [2023-11-24 21:38:39,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140200763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:39,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:39,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:39,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778388551] [2023-11-24 21:38:39,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:39,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:39,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:39,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:39,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2023-11-24 21:38:39,926 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) [2023-11-24 21:38:39,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:39,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2023-11-24 21:38:39,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:40,014 INFO L124 PetriNetUnfolderBase]: 58/253 cut-off events. [2023-11-24 21:38:40,014 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-24 21:38:40,015 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. [2023-11-24 21:38:40,017 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 19 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-11-24 21:38:40,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 146 flow [2023-11-24 21:38:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-24 21:38:40,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2023-11-24 21:38:40,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-24 21:38:40,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-24 21:38:40,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:40,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-24 21:38:40,022 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) [2023-11-24 21:38:40,023 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) [2023-11-24 21:38:40,023 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) [2023-11-24 21:38:40,023 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 110 flow. Second operand 3 states and 90 transitions. [2023-11-24 21:38:40,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 146 flow [2023-11-24 21:38:40,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:40,026 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 103 flow [2023-11-24 21:38:40,026 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} [2023-11-24 21:38:40,027 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-11-24 21:38:40,028 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 103 flow [2023-11-24 21:38:40,028 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) [2023-11-24 21:38:40,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:40,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:40,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:38:40,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-24 21:38:40,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash 711052001, now seen corresponding path program 1 times [2023-11-24 21:38:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:40,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139593948] [2023-11-24 21:38:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:40,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:40,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139593948] [2023-11-24 21:38:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139593948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:40,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:40,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:38:40,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935559145] [2023-11-24 21:38:40,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:40,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:40,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 53 [2023-11-24 21:38:40,086 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) [2023-11-24 21:38:40,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:40,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 53 [2023-11-24 21:38:40,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:40,171 INFO L124 PetriNetUnfolderBase]: 56/250 cut-off events. [2023-11-24 21:38:40,171 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-24 21:38:40,174 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. [2023-11-24 21:38:40,177 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 23 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-24 21:38:40,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 165 flow [2023-11-24 21:38:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2023-11-24 21:38:40,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2023-11-24 21:38:40,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2023-11-24 21:38:40,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2023-11-24 21:38:40,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:40,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2023-11-24 21:38:40,182 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) [2023-11-24 21:38:40,182 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) [2023-11-24 21:38:40,183 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) [2023-11-24 21:38:40,183 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 103 flow. Second operand 3 states and 100 transitions. [2023-11-24 21:38:40,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 165 flow [2023-11-24 21:38:40,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 157 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:40,185 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 109 flow [2023-11-24 21:38:40,186 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} [2023-11-24 21:38:40,187 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-11-24 21:38:40,187 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 109 flow [2023-11-24 21:38:40,187 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) [2023-11-24 21:38:40,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:40,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:40,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:38:40,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-24 21:38:40,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash 711052003, now seen corresponding path program 1 times [2023-11-24 21:38:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:40,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936766927] [2023-11-24 21:38:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:40,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:40,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936766927] [2023-11-24 21:38:40,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936766927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:40,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:40,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:40,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479351048] [2023-11-24 21:38:40,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:40,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:40,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:40,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2023-11-24 21:38:40,341 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) [2023-11-24 21:38:40,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:40,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2023-11-24 21:38:40,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:40,435 INFO L124 PetriNetUnfolderBase]: 62/215 cut-off events. [2023-11-24 21:38:40,436 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-24 21:38:40,436 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. [2023-11-24 21:38:40,438 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 21 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-11-24 21:38:40,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 147 flow [2023-11-24 21:38:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-24 21:38:40,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2023-11-24 21:38:40,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-24 21:38:40,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-24 21:38:40,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:40,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-24 21:38:40,441 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) [2023-11-24 21:38:40,442 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) [2023-11-24 21:38:40,442 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) [2023-11-24 21:38:40,442 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 109 flow. Second operand 3 states and 82 transitions. [2023-11-24 21:38:40,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 147 flow [2023-11-24 21:38:40,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:40,445 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 99 flow [2023-11-24 21:38:40,445 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} [2023-11-24 21:38:40,446 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -11 predicate places. [2023-11-24 21:38:40,446 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 99 flow [2023-11-24 21:38:40,446 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) [2023-11-24 21:38:40,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:40,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 21:38:40,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:38:40,447 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-24 21:38:40,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:40,448 INFO L85 PathProgramCache]: Analyzing trace with hash 567016496, now seen corresponding path program 1 times [2023-11-24 21:38:40,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:40,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441104291] [2023-11-24 21:38:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:40,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:38:40,464 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:38:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:38:40,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:38:40,506 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:38:40,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2023-11-24 21:38:40,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2023-11-24 21:38:40,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2023-11-24 21:38:40,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2023-11-24 21:38:40,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2023-11-24 21:38:40,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2023-11-24 21:38:40,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2023-11-24 21:38:40,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2023-11-24 21:38:40,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2023-11-24 21:38:40,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (24 of 34 remaining) [2023-11-24 21:38:40,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2023-11-24 21:38:40,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2023-11-24 21:38:40,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (21 of 34 remaining) [2023-11-24 21:38:40,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (20 of 34 remaining) [2023-11-24 21:38:40,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2023-11-24 21:38:40,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2023-11-24 21:38:40,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2023-11-24 21:38:40,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2023-11-24 21:38:40,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (15 of 34 remaining) [2023-11-24 21:38:40,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2023-11-24 21:38:40,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2023-11-24 21:38:40,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2023-11-24 21:38:40,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2023-11-24 21:38:40,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2023-11-24 21:38:40,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2023-11-24 21:38:40,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2023-11-24 21:38:40,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2023-11-24 21:38:40,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 34 remaining) [2023-11-24 21:38:40,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2023-11-24 21:38:40,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2023-11-24 21:38:40,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 34 remaining) [2023-11-24 21:38:40,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 34 remaining) [2023-11-24 21:38:40,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 34 remaining) [2023-11-24 21:38:40,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 34 remaining) [2023-11-24 21:38:40,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:38:40,527 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-24 21:38:40,530 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:38:40,530 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 21:38:40,585 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:38:40,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 202 flow [2023-11-24 21:38:40,608 INFO L124 PetriNetUnfolderBase]: 8/111 cut-off events. [2023-11-24 21:38:40,609 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:38:40,610 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. [2023-11-24 21:38:40,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 96 transitions, 202 flow [2023-11-24 21:38:40,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 96 transitions, 202 flow [2023-11-24 21:38:40,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:38:40,615 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;@21c46ffa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:38:40,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-11-24 21:38:40,616 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:38:40,617 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:38:40,617 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:38:40,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:40,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:38:40,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:40,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:40,618 INFO L85 PathProgramCache]: Analyzing trace with hash 412331, now seen corresponding path program 1 times [2023-11-24 21:38:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:40,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501447820] [2023-11-24 21:38:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:40,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:40,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:40,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501447820] [2023-11-24 21:38:40,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501447820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:40,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:38:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100578560] [2023-11-24 21:38:40,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:40,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:40,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:40,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 96 [2023-11-24 21:38:40,693 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) [2023-11-24 21:38:40,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:40,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 96 [2023-11-24 21:38:40,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:42,377 INFO L124 PetriNetUnfolderBase]: 4889/11175 cut-off events. [2023-11-24 21:38:42,377 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-11-24 21:38:42,400 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. [2023-11-24 21:38:42,481 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 75 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-11-24 21:38:42,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 415 flow [2023-11-24 21:38:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-11-24 21:38:42,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7881944444444444 [2023-11-24 21:38:42,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-11-24 21:38:42,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-11-24 21:38:42,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:42,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-11-24 21:38:42,487 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) [2023-11-24 21:38:42,489 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) [2023-11-24 21:38:42,489 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) [2023-11-24 21:38:42,490 INFO L175 Difference]: Start difference. First operand has 93 places, 96 transitions, 202 flow. Second operand 3 states and 227 transitions. [2023-11-24 21:38:42,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 415 flow [2023-11-24 21:38:42,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 121 transitions, 415 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:38:42,495 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 206 flow [2023-11-24 21:38:42,495 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} [2023-11-24 21:38:42,496 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2023-11-24 21:38:42,496 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 206 flow [2023-11-24 21:38:42,497 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) [2023-11-24 21:38:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:42,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:38:42,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:38:42,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:42,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:42,498 INFO L85 PathProgramCache]: Analyzing trace with hash 412332, now seen corresponding path program 1 times [2023-11-24 21:38:42,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:42,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420860323] [2023-11-24 21:38:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:42,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:42,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:42,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420860323] [2023-11-24 21:38:42,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420860323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:42,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:42,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:38:42,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122793848] [2023-11-24 21:38:42,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:42,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:42,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:42,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:42,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2023-11-24 21:38:42,583 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) [2023-11-24 21:38:42,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:42,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2023-11-24 21:38:42,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:43,849 INFO L124 PetriNetUnfolderBase]: 3675/9063 cut-off events. [2023-11-24 21:38:43,849 INFO L125 PetriNetUnfolderBase]: For 861/861 co-relation queries the response was YES. [2023-11-24 21:38:43,875 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. [2023-11-24 21:38:43,927 INFO L140 encePairwiseOnDemand]: 94/96 looper letters, 40 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-11-24 21:38:43,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 286 flow [2023-11-24 21:38:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-24 21:38:43,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2023-11-24 21:38:43,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-24 21:38:43,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-24 21:38:43,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:43,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-24 21:38:43,931 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) [2023-11-24 21:38:43,932 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) [2023-11-24 21:38:43,933 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) [2023-11-24 21:38:43,933 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 206 flow. Second operand 3 states and 172 transitions. [2023-11-24 21:38:43,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 286 flow [2023-11-24 21:38:43,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:43,942 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 198 flow [2023-11-24 21:38:43,942 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} [2023-11-24 21:38:43,944 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -4 predicate places. [2023-11-24 21:38:43,944 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 198 flow [2023-11-24 21:38:43,944 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) [2023-11-24 21:38:43,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:43,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:43,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:38:43,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:43,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:43,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1441603135, now seen corresponding path program 1 times [2023-11-24 21:38:43,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:43,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14135674] [2023-11-24 21:38:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:43,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:43,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:43,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14135674] [2023-11-24 21:38:43,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14135674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:43,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:43,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:38:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774781862] [2023-11-24 21:38:43,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:43,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:43,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:44,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:44,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 96 [2023-11-24 21:38:44,002 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) [2023-11-24 21:38:44,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:44,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 96 [2023-11-24 21:38:44,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:45,421 INFO L124 PetriNetUnfolderBase]: 3719/9215 cut-off events. [2023-11-24 21:38:45,421 INFO L125 PetriNetUnfolderBase]: For 552/552 co-relation queries the response was YES. [2023-11-24 21:38:45,447 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. [2023-11-24 21:38:45,495 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 49 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-24 21:38:45,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 96 transitions, 329 flow [2023-11-24 21:38:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-24 21:38:45,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2023-11-24 21:38:45,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-24 21:38:45,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-24 21:38:45,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:45,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-24 21:38:45,500 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) [2023-11-24 21:38:45,502 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) [2023-11-24 21:38:45,502 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) [2023-11-24 21:38:45,502 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 198 flow. Second operand 3 states and 189 transitions. [2023-11-24 21:38:45,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 96 transitions, 329 flow [2023-11-24 21:38:45,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:45,508 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 222 flow [2023-11-24 21:38:45,509 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} [2023-11-24 21:38:45,512 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2023-11-24 21:38:45,513 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 222 flow [2023-11-24 21:38:45,513 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) [2023-11-24 21:38:45,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:45,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:45,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:38:45,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:45,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1441603133, now seen corresponding path program 1 times [2023-11-24 21:38:45,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:45,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038689705] [2023-11-24 21:38:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:45,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:45,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:45,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038689705] [2023-11-24 21:38:45,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038689705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:45,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:45,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:45,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032876882] [2023-11-24 21:38:45,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:45,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:45,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2023-11-24 21:38:45,624 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) [2023-11-24 21:38:45,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:45,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2023-11-24 21:38:45,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:47,475 INFO L124 PetriNetUnfolderBase]: 6025/13336 cut-off events. [2023-11-24 21:38:47,475 INFO L125 PetriNetUnfolderBase]: For 1002/1002 co-relation queries the response was YES. [2023-11-24 21:38:47,521 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. [2023-11-24 21:38:47,745 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 77 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2023-11-24 21:38:47,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 124 transitions, 496 flow [2023-11-24 21:38:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-11-24 21:38:47,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-24 21:38:47,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-11-24 21:38:47,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-11-24 21:38:47,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:47,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-11-24 21:38:47,751 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) [2023-11-24 21:38:47,752 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) [2023-11-24 21:38:47,752 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) [2023-11-24 21:38:47,753 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 222 flow. Second operand 3 states and 200 transitions. [2023-11-24 21:38:47,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 124 transitions, 496 flow [2023-11-24 21:38:47,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 124 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:47,763 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 317 flow [2023-11-24 21:38:47,763 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} [2023-11-24 21:38:47,765 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2023-11-24 21:38:47,765 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 317 flow [2023-11-24 21:38:47,765 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) [2023-11-24 21:38:47,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:47,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:47,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:38:47,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:47,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1441603132, now seen corresponding path program 1 times [2023-11-24 21:38:47,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:47,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232324471] [2023-11-24 21:38:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:47,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:47,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232324471] [2023-11-24 21:38:47,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232324471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:47,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:47,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:47,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961423192] [2023-11-24 21:38:47,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:47,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:47,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:47,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:47,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2023-11-24 21:38:47,955 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) [2023-11-24 21:38:47,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:47,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2023-11-24 21:38:47,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:49,493 INFO L124 PetriNetUnfolderBase]: 4415/10314 cut-off events. [2023-11-24 21:38:49,494 INFO L125 PetriNetUnfolderBase]: For 4480/4540 co-relation queries the response was YES. [2023-11-24 21:38:49,536 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. [2023-11-24 21:38:49,591 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 64 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2023-11-24 21:38:49,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 506 flow [2023-11-24 21:38:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-11-24 21:38:49,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2023-11-24 21:38:49,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-11-24 21:38:49,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-11-24 21:38:49,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:49,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-11-24 21:38:49,595 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) [2023-11-24 21:38:49,597 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) [2023-11-24 21:38:49,597 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) [2023-11-24 21:38:49,597 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 317 flow. Second operand 3 states and 186 transitions. [2023-11-24 21:38:49,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 506 flow [2023-11-24 21:38:49,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:49,613 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 293 flow [2023-11-24 21:38:49,614 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} [2023-11-24 21:38:49,615 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -5 predicate places. [2023-11-24 21:38:49,615 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 293 flow [2023-11-24 21:38:49,616 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) [2023-11-24 21:38:49,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:49,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:49,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:38:49,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:49,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2096649803, now seen corresponding path program 1 times [2023-11-24 21:38:49,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:49,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329501190] [2023-11-24 21:38:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:38:49,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:49,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329501190] [2023-11-24 21:38:49,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329501190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:49,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:49,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:49,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695551212] [2023-11-24 21:38:49,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:49,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:49,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:49,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2023-11-24 21:38:49,801 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) [2023-11-24 21:38:49,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:49,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2023-11-24 21:38:49,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:50,846 INFO L124 PetriNetUnfolderBase]: 3952/9158 cut-off events. [2023-11-24 21:38:50,846 INFO L125 PetriNetUnfolderBase]: For 3905/3957 co-relation queries the response was YES. [2023-11-24 21:38:50,873 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. [2023-11-24 21:38:50,919 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 63 selfloop transitions, 5 changer transitions 0/107 dead transitions. [2023-11-24 21:38:50,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 509 flow [2023-11-24 21:38:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-11-24 21:38:50,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6284722222222222 [2023-11-24 21:38:50,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-11-24 21:38:50,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-11-24 21:38:50,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:50,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-11-24 21:38:50,924 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) [2023-11-24 21:38:50,925 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) [2023-11-24 21:38:50,926 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) [2023-11-24 21:38:50,926 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 293 flow. Second operand 3 states and 181 transitions. [2023-11-24 21:38:50,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 509 flow [2023-11-24 21:38:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:50,939 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 279 flow [2023-11-24 21:38:50,940 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} [2023-11-24 21:38:50,941 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -11 predicate places. [2023-11-24 21:38:50,941 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 279 flow [2023-11-24 21:38:50,941 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) [2023-11-24 21:38:50,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:50,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:50,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:38:50,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:50,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2096649804, now seen corresponding path program 1 times [2023-11-24 21:38:50,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:50,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024750424] [2023-11-24 21:38:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:50,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:38:51,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:51,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024750424] [2023-11-24 21:38:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024750424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:51,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:51,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773785484] [2023-11-24 21:38:51,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:51,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:51,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:51,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:51,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:51,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2023-11-24 21:38:51,075 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) [2023-11-24 21:38:51,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:51,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2023-11-24 21:38:51,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:52,494 INFO L124 PetriNetUnfolderBase]: 5694/11567 cut-off events. [2023-11-24 21:38:52,494 INFO L125 PetriNetUnfolderBase]: For 4926/4982 co-relation queries the response was YES. [2023-11-24 21:38:52,543 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. [2023-11-24 21:38:52,608 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 76 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2023-11-24 21:38:52,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 599 flow [2023-11-24 21:38:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2023-11-24 21:38:52,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631944444444444 [2023-11-24 21:38:52,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2023-11-24 21:38:52,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2023-11-24 21:38:52,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:52,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2023-11-24 21:38:52,613 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) [2023-11-24 21:38:52,614 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) [2023-11-24 21:38:52,614 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) [2023-11-24 21:38:52,615 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 279 flow. Second operand 3 states and 191 transitions. [2023-11-24 21:38:52,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 599 flow [2023-11-24 21:38:52,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 581 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:52,623 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 423 flow [2023-11-24 21:38:52,623 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} [2023-11-24 21:38:52,624 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2023-11-24 21:38:52,624 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 423 flow [2023-11-24 21:38:52,624 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) [2023-11-24 21:38:52,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:52,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:52,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:38:52,625 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:52,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1083656916, now seen corresponding path program 1 times [2023-11-24 21:38:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:52,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689868168] [2023-11-24 21:38:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:52,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:52,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:52,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689868168] [2023-11-24 21:38:52,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689868168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:52,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:52,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:52,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468286175] [2023-11-24 21:38:52,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:52,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:52,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:52,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 96 [2023-11-24 21:38:52,881 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) [2023-11-24 21:38:52,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:52,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 96 [2023-11-24 21:38:52,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:54,090 INFO L124 PetriNetUnfolderBase]: 5309/11410 cut-off events. [2023-11-24 21:38:54,090 INFO L125 PetriNetUnfolderBase]: For 9458/9606 co-relation queries the response was YES. [2023-11-24 21:38:54,134 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. [2023-11-24 21:38:54,187 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 91 selfloop transitions, 10 changer transitions 0/140 dead transitions. [2023-11-24 21:38:54,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 140 transitions, 800 flow [2023-11-24 21:38:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:38:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2023-11-24 21:38:54,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2023-11-24 21:38:54,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 339 transitions. [2023-11-24 21:38:54,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 339 transitions. [2023-11-24 21:38:54,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:54,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 339 transitions. [2023-11-24 21:38:54,192 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) [2023-11-24 21:38:54,194 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) [2023-11-24 21:38:54,194 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) [2023-11-24 21:38:54,194 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 423 flow. Second operand 6 states and 339 transitions. [2023-11-24 21:38:54,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 140 transitions, 800 flow [2023-11-24 21:38:54,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 140 transitions, 756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:54,221 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 478 flow [2023-11-24 21:38:54,221 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} [2023-11-24 21:38:54,222 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2023-11-24 21:38:54,222 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 478 flow [2023-11-24 21:38:54,222 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) [2023-11-24 21:38:54,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:54,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-24 21:38:54,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:38:54,223 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-24 21:38:54,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:54,223 INFO L85 PathProgramCache]: Analyzing trace with hash -572393463, now seen corresponding path program 1 times [2023-11-24 21:38:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:54,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180978460] [2023-11-24 21:38:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:54,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:38:54,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:38:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:38:54,262 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:38:54,263 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:38:54,263 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-11-24 21:38:54,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-11-24 21:38:54,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-11-24 21:38:54,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-11-24 21:38:54,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-11-24 21:38:54,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 49 remaining) [2023-11-24 21:38:54,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-11-24 21:38:54,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-11-24 21:38:54,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-11-24 21:38:54,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (39 of 49 remaining) [2023-11-24 21:38:54,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-11-24 21:38:54,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-11-24 21:38:54,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (36 of 49 remaining) [2023-11-24 21:38:54,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (35 of 49 remaining) [2023-11-24 21:38:54,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-11-24 21:38:54,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-11-24 21:38:54,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-11-24 21:38:54,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-11-24 21:38:54,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (30 of 49 remaining) [2023-11-24 21:38:54,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-11-24 21:38:54,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-11-24 21:38:54,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-11-24 21:38:54,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-11-24 21:38:54,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-11-24 21:38:54,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-11-24 21:38:54,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-11-24 21:38:54,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-11-24 21:38:54,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 49 remaining) [2023-11-24 21:38:54,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-11-24 21:38:54,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-11-24 21:38:54,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 49 remaining) [2023-11-24 21:38:54,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (17 of 49 remaining) [2023-11-24 21:38:54,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-11-24 21:38:54,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-11-24 21:38:54,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-11-24 21:38:54,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-11-24 21:38:54,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-11-24 21:38:54,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-11-24 21:38:54,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-11-24 21:38:54,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-11-24 21:38:54,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-11-24 21:38:54,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-11-24 21:38:54,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 49 remaining) [2023-11-24 21:38:54,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-11-24 21:38:54,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-11-24 21:38:54,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 49 remaining) [2023-11-24 21:38:54,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 49 remaining) [2023-11-24 21:38:54,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-11-24 21:38:54,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2023-11-24 21:38:54,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:38:54,272 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:54,273 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:38:54,274 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-24 21:38:54,364 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:38:54,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 139 transitions, 296 flow [2023-11-24 21:38:54,396 INFO L124 PetriNetUnfolderBase]: 12/162 cut-off events. [2023-11-24 21:38:54,396 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 21:38:54,398 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. [2023-11-24 21:38:54,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 139 transitions, 296 flow [2023-11-24 21:38:54,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 139 transitions, 296 flow [2023-11-24 21:38:54,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:38:54,409 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;@21c46ffa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:38:54,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-24 21:38:54,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:38:54,411 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:38:54,411 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:38:54,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:54,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:38:54,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-24 21:38:54,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash 550358, now seen corresponding path program 1 times [2023-11-24 21:38:54,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:54,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062085984] [2023-11-24 21:38:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:54,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:54,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062085984] [2023-11-24 21:38:54,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062085984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:54,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:54,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:38:54,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428243992] [2023-11-24 21:38:54,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:54,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:54,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:54,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:54,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 139 [2023-11-24 21:38:54,487 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) [2023-11-24 21:38:54,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:54,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 139 [2023-11-24 21:38:54,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:20,069 INFO L124 PetriNetUnfolderBase]: 139658/254386 cut-off events. [2023-11-24 21:39:20,069 INFO L125 PetriNetUnfolderBase]: For 11823/11823 co-relation queries the response was YES. [2023-11-24 21:39:20,621 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. [2023-11-24 21:39:21,877 INFO L140 encePairwiseOnDemand]: 120/139 looper letters, 110 selfloop transitions, 5 changer transitions 0/177 dead transitions. [2023-11-24 21:39:21,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 614 flow [2023-11-24 21:39:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-11-24 21:39:21,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7937649880095923 [2023-11-24 21:39:21,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-11-24 21:39:21,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-11-24 21:39:21,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:21,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-11-24 21:39:21,882 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) [2023-11-24 21:39:21,883 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) [2023-11-24 21:39:21,883 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) [2023-11-24 21:39:21,884 INFO L175 Difference]: Start difference. First operand has 134 places, 139 transitions, 296 flow. Second operand 3 states and 331 transitions. [2023-11-24 21:39:21,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 614 flow [2023-11-24 21:39:21,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 177 transitions, 610 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-24 21:39:21,892 INFO L231 Difference]: Finished difference. Result has 129 places, 125 transitions, 296 flow [2023-11-24 21:39:21,893 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} [2023-11-24 21:39:21,893 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -5 predicate places. [2023-11-24 21:39:21,894 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 296 flow [2023-11-24 21:39:21,894 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) [2023-11-24 21:39:21,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:21,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:39:21,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:39:21,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-24 21:39:21,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:21,895 INFO L85 PathProgramCache]: Analyzing trace with hash 550359, now seen corresponding path program 1 times [2023-11-24 21:39:21,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:21,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803480061] [2023-11-24 21:39:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:21,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:21,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803480061] [2023-11-24 21:39:21,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803480061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:21,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:21,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:21,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88971802] [2023-11-24 21:39:21,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:21,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:21,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 139 [2023-11-24 21:39:21,989 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) [2023-11-24 21:39:21,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:21,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 139 [2023-11-24 21:39:21,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand