./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/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_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:06:15,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:06:15,378 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:06:15,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:06:15,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:06:15,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:06:15,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:06:15,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:06:15,431 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:06:15,432 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:06:15,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:06:15,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:06:15,434 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:06:15,434 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:06:15,435 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:06:15,436 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:06:15,436 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:06:15,437 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:06:15,437 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:06:15,438 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:06:15,438 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:06:15,445 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:06:15,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:06:15,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:06:15,446 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:06:15,447 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:06:15,447 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:06:15,447 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:06:15,448 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:06:15,448 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:06:15,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:06:15,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:06:15,451 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:06:15,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:06:15,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:06:15,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:06:15,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:06:15,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:06:15,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:06:15,453 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:06:15,454 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:06:15,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:06:15,454 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_f9de990c-c12f-4fa7-bc98-82053bc9116f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2023-11-24 22:06:15,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:06:15,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:06:15,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:06:15,883 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:06:15,883 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:06:15,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-24 22:06:19,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:06:19,491 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:06:19,492 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-24 22:06:19,509 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/data/0e0c670e6/044e9ff9c7f7448dbec3661657d28df6/FLAGc966c33e7 [2023-11-24 22:06:19,525 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/data/0e0c670e6/044e9ff9c7f7448dbec3661657d28df6 [2023-11-24 22:06:19,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:06:19,529 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:06:19,531 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:06:19,531 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:06:19,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:06:19,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:06:19" (1/1) ... [2023-11-24 22:06:19,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2690efd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:19, skipping insertion in model container [2023-11-24 22:06:19,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:06:19" (1/1) ... [2023-11-24 22:06:19,602 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:06:20,058 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-24 22:06:20,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:06:20,095 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:06:20,165 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-24 22:06:20,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:06:20,214 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:06:20,215 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:06:20,223 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:06:20,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20 WrapperNode [2023-11-24 22:06:20,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:06:20,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:06:20,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:06:20,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:06:20,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,285 INFO L138 Inliner]: procedures = 173, calls = 50, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 118 [2023-11-24 22:06:20,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:06:20,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:06:20,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:06:20,286 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:06:20,300 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,304 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,322 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-24 22:06:20,322 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,323 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,333 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,339 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,341 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,346 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:06:20,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:06:20,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:06:20,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:06:20,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (1/1) ... [2023-11-24 22:06:20,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:06:20,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:06:20,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:06:20,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:06:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:06:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:06:20,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:06:20,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:06:20,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 22:06:20,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:06:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:06:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:06:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:06:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 22:06:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:06:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:06:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-24 22:06:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-24 22:06:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:06:20,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:06:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:06:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:06:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:06:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:06:20,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 22:06:20,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:06:20,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:06:20,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:06:20,542 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-24 22:06:20,542 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-24 22:06:20,544 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 22:06:20,798 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:06:20,802 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:06:21,091 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:06:21,217 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:06:21,217 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 22:06:21,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:21 BoogieIcfgContainer [2023-11-24 22:06:21,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:06:21,221 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:06:21,221 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:06:21,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:06:21,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:06:19" (1/3) ... [2023-11-24 22:06:21,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec19785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:06:21, skipping insertion in model container [2023-11-24 22:06:21,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:06:20" (2/3) ... [2023-11-24 22:06:21,227 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec19785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:06:21, skipping insertion in model container [2023-11-24 22:06:21,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:21" (3/3) ... [2023-11-24 22:06:21,229 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-11-24 22:06:21,239 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 22:06:21,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:06:21,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:06:21,253 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:06:21,332 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-24 22:06:21,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 57 transitions, 142 flow [2023-11-24 22:06:21,416 INFO L124 PetriNetUnfolderBase]: 2/53 cut-off events. [2023-11-24 22:06:21,416 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 22:06:21,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 53 events. 2/53 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-11-24 22:06:21,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 57 transitions, 142 flow [2023-11-24 22:06:21,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 51 transitions, 123 flow [2023-11-24 22:06:21,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:06:21,447 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@79a644ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:06:21,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 22:06:21,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:06:21,469 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-11-24 22:06:21,470 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:06:21,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:21,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:21,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:06:21,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:21,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1937302976, now seen corresponding path program 1 times [2023-11-24 22:06:21,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:21,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458338936] [2023-11-24 22:06:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:21,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:21,890 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 22:06:21,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:21,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458338936] [2023-11-24 22:06:21,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458338936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:21,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:21,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:06:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925981160] [2023-11-24 22:06:21,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:21,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:06:21,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:06:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:06:22,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2023-11-24 22:06:22,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 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 22:06:22,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:22,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2023-11-24 22:06:22,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:25,563 INFO L124 PetriNetUnfolderBase]: 12461/22123 cut-off events. [2023-11-24 22:06:25,563 INFO L125 PetriNetUnfolderBase]: For 1710/1710 co-relation queries the response was YES. [2023-11-24 22:06:25,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40825 conditions, 22123 events. 12461/22123 cut-off events. For 1710/1710 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 191888 event pairs, 1333 based on Foata normal form. 1220/22292 useless extension candidates. Maximal degree in co-relation 32953. Up to 5783 conditions per place. [2023-11-24 22:06:25,764 INFO L140 encePairwiseOnDemand]: 44/57 looper letters, 176 selfloop transitions, 37 changer transitions 6/233 dead transitions. [2023-11-24 22:06:25,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 233 transitions, 1012 flow [2023-11-24 22:06:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 22:06:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 22:06:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 469 transitions. [2023-11-24 22:06:25,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329284750337382 [2023-11-24 22:06:25,782 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 469 transitions. [2023-11-24 22:06:25,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 469 transitions. [2023-11-24 22:06:25,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:25,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 469 transitions. [2023-11-24 22:06:25,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 36.07692307692308) internal successors, (469), 13 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 22:06:25,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 22:06:25,800 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 22:06:25,802 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 123 flow. Second operand 13 states and 469 transitions. [2023-11-24 22:06:25,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 233 transitions, 1012 flow [2023-11-24 22:06:25,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 233 transitions, 948 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 22:06:25,830 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 349 flow [2023-11-24 22:06:25,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2023-11-24 22:06:25,837 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 13 predicate places. [2023-11-24 22:06:25,837 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 349 flow [2023-11-24 22:06:25,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 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 22:06:25,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:25,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:25,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:06:25,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:06:25,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash 801931685, now seen corresponding path program 1 times [2023-11-24 22:06:25,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:25,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345001280] [2023-11-24 22:06:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:25,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:25,974 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 22:06:25,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:25,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345001280] [2023-11-24 22:06:25,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345001280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:25,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:25,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:25,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715180815] [2023-11-24 22:06:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:25,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:25,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:25,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 57 [2023-11-24 22:06:25,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 349 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:25,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:25,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 57 [2023-11-24 22:06:25,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:27,723 INFO L124 PetriNetUnfolderBase]: 4908/10846 cut-off events. [2023-11-24 22:06:27,724 INFO L125 PetriNetUnfolderBase]: For 1292/1450 co-relation queries the response was YES. [2023-11-24 22:06:27,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21226 conditions, 10846 events. 4908/10846 cut-off events. For 1292/1450 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 107312 event pairs, 2096 based on Foata normal form. 406/10334 useless extension candidates. Maximal degree in co-relation 20122. Up to 3942 conditions per place. [2023-11-24 22:06:27,831 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 40 selfloop transitions, 4 changer transitions 0/105 dead transitions. [2023-11-24 22:06:27,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 105 transitions, 477 flow [2023-11-24 22:06:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:06:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-24 22:06:27,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7368421052631579 [2023-11-24 22:06:27,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-24 22:06:27,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-24 22:06:27,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:27,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-24 22:06:27,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:27,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 22:06:27,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 22:06:27,837 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 349 flow. Second operand 3 states and 126 transitions. [2023-11-24 22:06:27,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 105 transitions, 477 flow [2023-11-24 22:06:28,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:06:28,022 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 365 flow [2023-11-24 22:06:28,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2023-11-24 22:06:28,023 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 16 predicate places. [2023-11-24 22:06:28,024 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 365 flow [2023-11-24 22:06:28,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:28,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:28,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:28,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:06:28,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:06:28,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:28,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1531572869, now seen corresponding path program 2 times [2023-11-24 22:06:28,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:28,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328802853] [2023-11-24 22:06:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:28,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:06:28,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:28,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328802853] [2023-11-24 22:06:28,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328802853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:28,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451981214] [2023-11-24 22:06:28,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:28,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:06:28,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:06:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:06:28,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 57 [2023-11-24 22:06:28,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:28,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:28,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 57 [2023-11-24 22:06:28,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:29,791 INFO L124 PetriNetUnfolderBase]: 5414/11332 cut-off events. [2023-11-24 22:06:29,792 INFO L125 PetriNetUnfolderBase]: For 4069/4143 co-relation queries the response was YES. [2023-11-24 22:06:29,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24077 conditions, 11332 events. 5414/11332 cut-off events. For 4069/4143 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 103967 event pairs, 1639 based on Foata normal form. 126/10860 useless extension candidates. Maximal degree in co-relation 22911. Up to 3757 conditions per place. [2023-11-24 22:06:29,903 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 59 selfloop transitions, 9 changer transitions 3/132 dead transitions. [2023-11-24 22:06:29,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 132 transitions, 621 flow [2023-11-24 22:06:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:06:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:06:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2023-11-24 22:06:29,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7763157894736842 [2023-11-24 22:06:29,908 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 177 transitions. [2023-11-24 22:06:29,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 177 transitions. [2023-11-24 22:06:29,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:29,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 177 transitions. [2023-11-24 22:06:29,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 22:06:29,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 22:06:29,913 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 22:06:29,913 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 365 flow. Second operand 4 states and 177 transitions. [2023-11-24 22:06:29,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 132 transitions, 621 flow [2023-11-24 22:06:30,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 132 transitions, 609 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:30,031 INFO L231 Difference]: Finished difference. Result has 82 places, 94 transitions, 423 flow [2023-11-24 22:06:30,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=423, PETRI_PLACES=82, PETRI_TRANSITIONS=94} [2023-11-24 22:06:30,033 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 20 predicate places. [2023-11-24 22:06:30,034 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 94 transitions, 423 flow [2023-11-24 22:06:30,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:30,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:30,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:30,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:06:30,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:06:30,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:30,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1241268126, now seen corresponding path program 1 times [2023-11-24 22:06:30,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:30,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324603760] [2023-11-24 22:06:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:30,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:30,229 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 22:06:30,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324603760] [2023-11-24 22:06:30,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324603760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:30,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:30,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:06:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365524765] [2023-11-24 22:06:30,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:30,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:06:30,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:06:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:06:30,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2023-11-24 22:06:30,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 94 transitions, 423 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 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 22:06:30,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:30,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2023-11-24 22:06:30,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:33,565 INFO L124 PetriNetUnfolderBase]: 13844/23478 cut-off events. [2023-11-24 22:06:33,565 INFO L125 PetriNetUnfolderBase]: For 19479/20132 co-relation queries the response was YES. [2023-11-24 22:06:33,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58169 conditions, 23478 events. 13844/23478 cut-off events. For 19479/20132 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 187424 event pairs, 2194 based on Foata normal form. 350/23387 useless extension candidates. Maximal degree in co-relation 56243. Up to 5134 conditions per place. [2023-11-24 22:06:33,753 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 177 selfloop transitions, 52 changer transitions 67/321 dead transitions. [2023-11-24 22:06:33,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 321 transitions, 1871 flow [2023-11-24 22:06:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 22:06:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 22:06:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 464 transitions. [2023-11-24 22:06:33,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261808367071525 [2023-11-24 22:06:33,757 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 464 transitions. [2023-11-24 22:06:33,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 464 transitions. [2023-11-24 22:06:33,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:33,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 464 transitions. [2023-11-24 22:06:33,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 35.69230769230769) internal successors, (464), 13 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 22:06:33,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 22:06:33,764 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 22:06:33,764 INFO L175 Difference]: Start difference. First operand has 82 places, 94 transitions, 423 flow. Second operand 13 states and 464 transitions. [2023-11-24 22:06:33,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 321 transitions, 1871 flow [2023-11-24 22:06:34,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 321 transitions, 1871 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:06:34,362 INFO L231 Difference]: Finished difference. Result has 105 places, 130 transitions, 842 flow [2023-11-24 22:06:34,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=842, PETRI_PLACES=105, PETRI_TRANSITIONS=130} [2023-11-24 22:06:34,365 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 43 predicate places. [2023-11-24 22:06:34,366 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 130 transitions, 842 flow [2023-11-24 22:06:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 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 22:06:34,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:34,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:34,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:06:34,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:06:34,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:34,370 INFO L85 PathProgramCache]: Analyzing trace with hash -345786192, now seen corresponding path program 1 times [2023-11-24 22:06:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:34,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539294914] [2023-11-24 22:06:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:34,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:34,526 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 22:06:34,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:34,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539294914] [2023-11-24 22:06:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539294914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:34,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:34,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:06:34,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152212001] [2023-11-24 22:06:34,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:34,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:06:34,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:06:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:06:34,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2023-11-24 22:06:34,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 130 transitions, 842 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:34,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:34,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2023-11-24 22:06:34,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:38,120 INFO L124 PetriNetUnfolderBase]: 13182/23116 cut-off events. [2023-11-24 22:06:38,120 INFO L125 PetriNetUnfolderBase]: For 33514/33915 co-relation queries the response was YES. [2023-11-24 22:06:38,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67542 conditions, 23116 events. 13182/23116 cut-off events. For 33514/33915 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 192495 event pairs, 2884 based on Foata normal form. 411/23363 useless extension candidates. Maximal degree in co-relation 63955. Up to 6148 conditions per place. [2023-11-24 22:06:38,295 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 180 selfloop transitions, 66 changer transitions 22/293 dead transitions. [2023-11-24 22:06:38,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 293 transitions, 2039 flow [2023-11-24 22:06:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 22:06:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 22:06:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 434 transitions. [2023-11-24 22:06:38,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5856950067476383 [2023-11-24 22:06:38,298 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 434 transitions. [2023-11-24 22:06:38,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 434 transitions. [2023-11-24 22:06:38,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:38,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 434 transitions. [2023-11-24 22:06:38,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 33.38461538461539) internal successors, (434), 13 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 22:06:38,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 22:06:38,304 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 22:06:38,304 INFO L175 Difference]: Start difference. First operand has 105 places, 130 transitions, 842 flow. Second operand 13 states and 434 transitions. [2023-11-24 22:06:38,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 293 transitions, 2039 flow [2023-11-24 22:06:39,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 293 transitions, 1999 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-24 22:06:39,408 INFO L231 Difference]: Finished difference. Result has 119 places, 152 transitions, 1158 flow [2023-11-24 22:06:39,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1158, PETRI_PLACES=119, PETRI_TRANSITIONS=152} [2023-11-24 22:06:39,409 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 57 predicate places. [2023-11-24 22:06:39,409 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 152 transitions, 1158 flow [2023-11-24 22:06:39,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:39,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:39,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:39,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:06:39,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:06:39,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash -47567194, now seen corresponding path program 1 times [2023-11-24 22:06:39,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:39,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22988232] [2023-11-24 22:06:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:39,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:39,489 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 22:06:39,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:39,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22988232] [2023-11-24 22:06:39,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22988232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:39,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:39,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:06:39,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204789755] [2023-11-24 22:06:39,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:39,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:06:39,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:39,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:06:39,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:06:39,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2023-11-24 22:06:39,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 152 transitions, 1158 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:39,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:06:39,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2023-11-24 22:06:39,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:06:43,504 INFO L124 PetriNetUnfolderBase]: 14498/25001 cut-off events. [2023-11-24 22:06:43,504 INFO L125 PetriNetUnfolderBase]: For 41554/42079 co-relation queries the response was YES. [2023-11-24 22:06:43,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76317 conditions, 25001 events. 14498/25001 cut-off events. For 41554/42079 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 206280 event pairs, 3340 based on Foata normal form. 579/25282 useless extension candidates. Maximal degree in co-relation 73526. Up to 6812 conditions per place. [2023-11-24 22:06:43,693 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 183 selfloop transitions, 72 changer transitions 32/323 dead transitions. [2023-11-24 22:06:43,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 323 transitions, 2442 flow [2023-11-24 22:06:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 22:06:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 22:06:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 440 transitions. [2023-11-24 22:06:43,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5937921727395412 [2023-11-24 22:06:43,697 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 440 transitions. [2023-11-24 22:06:43,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 440 transitions. [2023-11-24 22:06:43,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:06:43,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 440 transitions. [2023-11-24 22:06:43,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 33.84615384615385) internal successors, (440), 13 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:06:43,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 22:06:43,711 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 57.0) internal successors, (798), 14 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 22:06:43,711 INFO L175 Difference]: Start difference. First operand has 119 places, 152 transitions, 1158 flow. Second operand 13 states and 440 transitions. [2023-11-24 22:06:43,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 323 transitions, 2442 flow [2023-11-24 22:06:44,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 323 transitions, 2428 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-24 22:06:44,482 INFO L231 Difference]: Finished difference. Result has 134 places, 174 transitions, 1531 flow [2023-11-24 22:06:44,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1531, PETRI_PLACES=134, PETRI_TRANSITIONS=174} [2023-11-24 22:06:44,483 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 72 predicate places. [2023-11-24 22:06:44,484 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 174 transitions, 1531 flow [2023-11-24 22:06:44,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:06:44,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:06:44,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:44,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:06:44,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 22:06:44,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash -776191228, now seen corresponding path program 1 times [2023-11-24 22:06:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:44,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058359211] [2023-11-24 22:06:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:44,532 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 22:06:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 22:06:44,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 22:06:44,582 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 22:06:44,584 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-11-24 22:06:44,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-24 22:06:44,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-24 22:06:44,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-11-24 22:06:44,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-11-24 22:06:44,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-24 22:06:44,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-24 22:06:44,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:06:44,588 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-24 22:06:44,594 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-24 22:06:44,595 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 22:06:44,835 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated [2023-11-24 22:06:44,836 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-24 22:06:44,837 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-24 22:06:44,840 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated [2023-11-24 22:06:44,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 10:06:44 BasicIcfg [2023-11-24 22:06:44,861 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 22:06:44,862 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 22:06:44,862 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 22:06:44,862 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 22:06:44,863 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:06:21" (3/4) ... [2023-11-24 22:06:44,863 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-24 22:06:44,882 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated [2023-11-24 22:06:44,883 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-24 22:06:44,883 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-24 22:06:44,885 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated [2023-11-24 22:06:44,931 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/witness.graphml [2023-11-24 22:06:44,932 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 22:06:44,932 INFO L158 Benchmark]: Toolchain (without parser) took 25403.31ms. Allocated memory was 165.7MB in the beginning and 7.2GB in the end (delta: 7.1GB). Free memory was 133.3MB in the beginning and 6.5GB in the end (delta: -6.3GB). Peak memory consumption was 725.4MB. Max. memory is 16.1GB. [2023-11-24 22:06:44,933 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 130.0MB. Free memory is still 101.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:06:44,933 INFO L158 Benchmark]: CACSL2BoogieTranslator took 694.71ms. Allocated memory is still 165.7MB. Free memory was 132.5MB in the beginning and 112.8MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-24 22:06:44,934 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.16ms. Allocated memory is still 165.7MB. Free memory was 112.8MB in the beginning and 110.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:06:44,934 INFO L158 Benchmark]: Boogie Preprocessor took 60.18ms. Allocated memory is still 165.7MB. Free memory was 110.6MB in the beginning and 108.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 22:06:44,935 INFO L158 Benchmark]: RCFGBuilder took 870.90ms. Allocated memory is still 165.7MB. Free memory was 108.1MB in the beginning and 108.5MB in the end (delta: -421.0kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-24 22:06:44,935 INFO L158 Benchmark]: TraceAbstraction took 23640.42ms. Allocated memory was 165.7MB in the beginning and 7.2GB in the end (delta: 7.1GB). Free memory was 108.1MB in the beginning and 6.5GB in the end (delta: -6.4GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2023-11-24 22:06:44,936 INFO L158 Benchmark]: Witness Printer took 70.06ms. Allocated memory is still 7.2GB. Free memory was 6.5GB in the beginning and 6.5GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 22:06:44,938 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 130.0MB. Free memory is still 101.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 694.71ms. Allocated memory is still 165.7MB. Free memory was 132.5MB in the beginning and 112.8MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.16ms. Allocated memory is still 165.7MB. Free memory was 112.8MB in the beginning and 110.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.18ms. Allocated memory is still 165.7MB. Free memory was 110.6MB in the beginning and 108.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 870.90ms. Allocated memory is still 165.7MB. Free memory was 108.1MB in the beginning and 108.5MB in the end (delta: -421.0kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 23640.42ms. Allocated memory was 165.7MB in the beginning and 7.2GB in the end (delta: 7.1GB). Free memory was 108.1MB in the beginning and 6.5GB in the end (delta: -6.4GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Witness Printer took 70.06ms. Allocated memory is still 7.2GB. Free memory was 6.5GB in the beginning and 6.5GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; VAL [arg={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 4 int l; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] 4 reach_error() VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 79 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23.2s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 21.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 779 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 716 mSDsluCounter, 274 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 199 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1980 IncrementalHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 75 mSDtfsCounter, 1980 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1531occurred in iteration=6, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 162 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-24 22:06:44,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9de990c-c12f-4fa7-bc98-82053bc9116f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE