./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 e7bb482b 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_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/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_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 0.2.3-dev-e7bb482 [2023-11-06 23:07:25,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:07:25,899 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:07:25,904 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:07:25,904 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:07:25,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:07:25,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:07:25,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:07:25,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:07:25,933 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:07:25,934 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:07:25,935 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:07:25,935 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:07:25,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:07:25,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:07:25,937 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:07:25,938 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:07:25,938 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:07:25,939 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:07:25,939 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:07:25,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:07:25,941 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:07:25,941 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:07:25,942 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:07:25,943 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:07:25,943 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:07:25,944 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:07:25,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:07:25,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:25,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:07:25,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:07:25,947 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:07:25,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:07:25,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:07:25,948 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:07:25,949 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:07:25,949 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:07:25,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:07:25,950 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:07:25,951 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_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2023-11-06 23:07:26,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:07:26,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:07:26,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:07:26,213 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:07:26,213 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:07:26,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-06 23:07:29,287 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:07:29,586 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:07:29,586 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-06 23:07:29,613 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/data/32a0a7e4d/f774fbc43c164fae92a4536b2a31a8c8/FLAGa2701ed97 [2023-11-06 23:07:29,627 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/data/32a0a7e4d/f774fbc43c164fae92a4536b2a31a8c8 [2023-11-06 23:07:29,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:07:29,632 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:07:29,633 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:29,633 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:07:29,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:07:29,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,647 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@812675b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:29, skipping insertion in model container [2023-11-06 23:07:29,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:29" (1/1) ... [2023-11-06 23:07:29,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:07:29,872 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 23:07:30,063 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_c90323b4-802a-4431-bf4b-a4c043d58680/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-06 23:07:30,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:30,097 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:07:30,118 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 23:07:30,151 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_c90323b4-802a-4431-bf4b-a4c043d58680/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-06 23:07:30,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:30,217 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:07:30,217 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:07:30,218 WARN L672 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:07:30,242 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:07:30,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30 WrapperNode [2023-11-06 23:07:30,243 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:30,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:30,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:07:30,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:07:30,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,292 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,339 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 118 [2023-11-06 23:07:30,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:30,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:07:30,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:07:30,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:07:30,351 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,377 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,384 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,386 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:07:30,401 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:07:30,401 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:07:30,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:07:30,402 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (1/1) ... [2023-11-06 23:07:30,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:30,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:30,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:07:30,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:07:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:07:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:07:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:07:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:07:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-06 23:07:30,487 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-06 23:07:30,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:07:30,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:07:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:07:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:07:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:07:30,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:07:30,490 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-06 23:07:30,490 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-06 23:07:30,492 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:07:30,676 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:07:30,678 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:07:30,880 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:07:30,926 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:07:30,926 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 23:07:30,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:30 BoogieIcfgContainer [2023-11-06 23:07:30,929 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:07:30,932 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:07:30,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:07:30,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:07:30,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:07:29" (1/3) ... [2023-11-06 23:07:30,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56526ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:30, skipping insertion in model container [2023-11-06 23:07:30,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:30" (2/3) ... [2023-11-06 23:07:30,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56526ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:30, skipping insertion in model container [2023-11-06 23:07:30,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:30" (3/3) ... [2023-11-06 23:07:30,939 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-11-06 23:07:30,947 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:07:30,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:07:30,957 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:07:30,957 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:07:31,043 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 23:07:31,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 248 flow [2023-11-06 23:07:31,168 INFO L124 PetriNetUnfolderBase]: 2/106 cut-off events. [2023-11-06 23:07:31,169 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 23:07:31,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 106 events. 2/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-06 23:07:31,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 110 transitions, 248 flow [2023-11-06 23:07:31,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 92 transitions, 205 flow [2023-11-06 23:07:31,186 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:07:31,200 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 92 transitions, 205 flow [2023-11-06 23:07:31,203 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 92 transitions, 205 flow [2023-11-06 23:07:31,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 92 transitions, 205 flow [2023-11-06 23:07:31,258 INFO L124 PetriNetUnfolderBase]: 2/92 cut-off events. [2023-11-06 23:07:31,258 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:07:31,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 92 events. 2/92 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-06 23:07:31,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 2574 [2023-11-06 23:07:34,147 INFO L134 LiptonReduction]: Checked pairs total: 7755 [2023-11-06 23:07:34,147 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-11-06 23:07:34,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:07:34,171 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=LoopsAndPotentialCycles, 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;@6253894, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:07:34,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 23:07:34,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:07:34,178 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-11-06 23:07:34,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:07:34,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:34,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:34,180 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)] === [2023-11-06 23:07:34,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1596627828, now seen corresponding path program 1 times [2023-11-06 23:07:34,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:34,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728859656] [2023-11-06 23:07:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:34,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:34,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:34,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728859656] [2023-11-06 23:07:34,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728859656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:34,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:34,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:07:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349830156] [2023-11-06 23:07:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:34,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:07:34,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:34,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:07:34,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:07:34,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 171 [2023-11-06 23:07:34,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:34,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:34,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 171 [2023-11-06 23:07:34,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:37,099 INFO L124 PetriNetUnfolderBase]: 11095/16828 cut-off events. [2023-11-06 23:07:37,099 INFO L125 PetriNetUnfolderBase]: For 1526/1526 co-relation queries the response was YES. [2023-11-06 23:07:37,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33348 conditions, 16828 events. 11095/16828 cut-off events. For 1526/1526 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 110915 event pairs, 1883 based on Foata normal form. 440/16468 useless extension candidates. Maximal degree in co-relation 26348. Up to 7825 conditions per place. [2023-11-06 23:07:37,261 INFO L140 encePairwiseOnDemand]: 162/171 looper letters, 132 selfloop transitions, 26 changer transitions 4/166 dead transitions. [2023-11-06 23:07:37,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 166 transitions, 740 flow [2023-11-06 23:07:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:07:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:07:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 938 transitions. [2023-11-06 23:07:37,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6094866796621182 [2023-11-06 23:07:37,286 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 938 transitions. [2023-11-06 23:07:37,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 938 transitions. [2023-11-06 23:07:37,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:37,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 938 transitions. [2023-11-06 23:07:37,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.22222222222223) internal successors, (938), 9 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:37,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:37,314 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:37,316 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 95 flow. Second operand 9 states and 938 transitions. [2023-11-06 23:07:37,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 166 transitions, 740 flow [2023-11-06 23:07:37,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 166 transitions, 690 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 23:07:37,346 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 223 flow [2023-11-06 23:07:37,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=223, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-11-06 23:07:37,353 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-11-06 23:07:37,353 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 223 flow [2023-11-06 23:07:37,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:37,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:37,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:37,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:07:37,355 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)] === [2023-11-06 23:07:37,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1197032216, now seen corresponding path program 1 times [2023-11-06 23:07:37,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:37,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836587901] [2023-11-06 23:07:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:37,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836587901] [2023-11-06 23:07:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836587901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:37,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:37,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:07:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666715392] [2023-11-06 23:07:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:37,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:37,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:37,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 171 [2023-11-06 23:07:37,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:37,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:37,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 171 [2023-11-06 23:07:37,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:38,619 INFO L124 PetriNetUnfolderBase]: 4668/7919 cut-off events. [2023-11-06 23:07:38,619 INFO L125 PetriNetUnfolderBase]: For 2415/2693 co-relation queries the response was YES. [2023-11-06 23:07:38,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17942 conditions, 7919 events. 4668/7919 cut-off events. For 2415/2693 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 59444 event pairs, 1459 based on Foata normal form. 904/7917 useless extension candidates. Maximal degree in co-relation 13397. Up to 3478 conditions per place. [2023-11-06 23:07:38,701 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 46 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-11-06 23:07:38,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 384 flow [2023-11-06 23:07:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:07:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-11-06 23:07:38,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6374269005847953 [2023-11-06 23:07:38,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-11-06 23:07:38,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-11-06 23:07:38,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:38,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-11-06 23:07:38,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,708 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 223 flow. Second operand 3 states and 327 transitions. [2023-11-06 23:07:38,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 384 flow [2023-11-06 23:07:38,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:38,737 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 239 flow [2023-11-06 23:07:38,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2023-11-06 23:07:38,739 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-11-06 23:07:38,739 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 239 flow [2023-11-06 23:07:38,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:38,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:38,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:07:38,740 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)] === [2023-11-06 23:07:38,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1349880642, now seen corresponding path program 2 times [2023-11-06 23:07:38,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:38,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805849191] [2023-11-06 23:07:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:38,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:38,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:38,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805849191] [2023-11-06 23:07:38,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805849191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:38,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:38,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:07:38,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806090282] [2023-11-06 23:07:38,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:38,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:07:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:38,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:07:38,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:07:38,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 171 [2023-11-06 23:07:38,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:38,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:38,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 171 [2023-11-06 23:07:38,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:39,511 INFO L124 PetriNetUnfolderBase]: 1766/3702 cut-off events. [2023-11-06 23:07:39,511 INFO L125 PetriNetUnfolderBase]: For 2871/2950 co-relation queries the response was YES. [2023-11-06 23:07:39,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8952 conditions, 3702 events. 1766/3702 cut-off events. For 2871/2950 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29700 event pairs, 440 based on Foata normal form. 367/3682 useless extension candidates. Maximal degree in co-relation 7693. Up to 1188 conditions per place. [2023-11-06 23:07:39,542 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 55 selfloop transitions, 7 changer transitions 14/108 dead transitions. [2023-11-06 23:07:39,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 108 transitions, 541 flow [2023-11-06 23:07:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:07:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:07:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2023-11-06 23:07:39,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476608187134503 [2023-11-06 23:07:39,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2023-11-06 23:07:39,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2023-11-06 23:07:39,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:39,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2023-11-06 23:07:39,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:39,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:39,552 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:39,552 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 239 flow. Second operand 4 states and 443 transitions. [2023-11-06 23:07:39,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 108 transitions, 541 flow [2023-11-06 23:07:39,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 108 transitions, 525 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:07:39,569 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 281 flow [2023-11-06 23:07:39,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-11-06 23:07:39,572 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2023-11-06 23:07:39,575 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 281 flow [2023-11-06 23:07:39,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:39,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:39,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:39,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:07:39,577 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)] === [2023-11-06 23:07:39,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:39,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1081725490, now seen corresponding path program 1 times [2023-11-06 23:07:39,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:39,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283561075] [2023-11-06 23:07:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:39,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:39,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283561075] [2023-11-06 23:07:39,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283561075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:39,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:39,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:07:39,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615464099] [2023-11-06 23:07:39,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:39,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:07:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:07:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:07:39,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 171 [2023-11-06 23:07:39,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:39,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:39,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 171 [2023-11-06 23:07:39,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:40,873 INFO L124 PetriNetUnfolderBase]: 3190/5890 cut-off events. [2023-11-06 23:07:40,874 INFO L125 PetriNetUnfolderBase]: For 5471/5627 co-relation queries the response was YES. [2023-11-06 23:07:40,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16426 conditions, 5890 events. 3190/5890 cut-off events. For 5471/5627 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 41918 event pairs, 465 based on Foata normal form. 156/5920 useless extension candidates. Maximal degree in co-relation 14803. Up to 2100 conditions per place. [2023-11-06 23:07:40,915 INFO L140 encePairwiseOnDemand]: 161/171 looper letters, 133 selfloop transitions, 43 changer transitions 36/217 dead transitions. [2023-11-06 23:07:40,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 217 transitions, 1342 flow [2023-11-06 23:07:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:07:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:07:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 936 transitions. [2023-11-06 23:07:40,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081871345029239 [2023-11-06 23:07:40,920 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 936 transitions. [2023-11-06 23:07:40,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 936 transitions. [2023-11-06 23:07:40,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:40,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 936 transitions. [2023-11-06 23:07:40,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,930 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,930 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 281 flow. Second operand 9 states and 936 transitions. [2023-11-06 23:07:40,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 217 transitions, 1342 flow [2023-11-06 23:07:40,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 217 transitions, 1326 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:40,954 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 620 flow [2023-11-06 23:07:40,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=620, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2023-11-06 23:07:40,956 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-11-06 23:07:40,956 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 620 flow [2023-11-06 23:07:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:40,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:40,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:40,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:07:40,957 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)] === [2023-11-06 23:07:40,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:40,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1949667587, now seen corresponding path program 1 times [2023-11-06 23:07:40,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:40,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296185955] [2023-11-06 23:07:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:40,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:41,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296185955] [2023-11-06 23:07:41,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296185955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:41,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:41,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:07:41,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210197172] [2023-11-06 23:07:41,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:41,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:07:41,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:07:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:07:41,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 171 [2023-11-06 23:07:41,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 620 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:41,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:41,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 171 [2023-11-06 23:07:41,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:42,081 INFO L124 PetriNetUnfolderBase]: 2901/5549 cut-off events. [2023-11-06 23:07:42,081 INFO L125 PetriNetUnfolderBase]: For 9075/9163 co-relation queries the response was YES. [2023-11-06 23:07:42,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18591 conditions, 5549 events. 2901/5549 cut-off events. For 9075/9163 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 40459 event pairs, 624 based on Foata normal form. 146/5668 useless extension candidates. Maximal degree in co-relation 17585. Up to 2486 conditions per place. [2023-11-06 23:07:42,133 INFO L140 encePairwiseOnDemand]: 162/171 looper letters, 120 selfloop transitions, 46 changer transitions 20/191 dead transitions. [2023-11-06 23:07:42,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 191 transitions, 1416 flow [2023-11-06 23:07:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:07:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:07:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 735 transitions. [2023-11-06 23:07:42,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2023-11-06 23:07:42,138 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 735 transitions. [2023-11-06 23:07:42,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 735 transitions. [2023-11-06 23:07:42,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:42,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 735 transitions. [2023-11-06 23:07:42,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,144 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,145 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 620 flow. Second operand 7 states and 735 transitions. [2023-11-06 23:07:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 191 transitions, 1416 flow [2023-11-06 23:07:42,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 191 transitions, 1414 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 23:07:42,218 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 790 flow [2023-11-06 23:07:42,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2023-11-06 23:07:42,222 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-11-06 23:07:42,222 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 790 flow [2023-11-06 23:07:42,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:42,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:42,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:07:42,223 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)] === [2023-11-06 23:07:42,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash -613326754, now seen corresponding path program 1 times [2023-11-06 23:07:42,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:42,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206193713] [2023-11-06 23:07:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:42,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:42,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:42,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206193713] [2023-11-06 23:07:42,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206193713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:42,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:42,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:07:42,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811881660] [2023-11-06 23:07:42,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:42,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:07:42,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:42,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:07:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:07:42,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 171 [2023-11-06 23:07:42,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 790 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:42,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:42,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 171 [2023-11-06 23:07:42,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:07:43,375 INFO L124 PetriNetUnfolderBase]: 2518/5053 cut-off events. [2023-11-06 23:07:43,376 INFO L125 PetriNetUnfolderBase]: For 10693/10812 co-relation queries the response was YES. [2023-11-06 23:07:43,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17727 conditions, 5053 events. 2518/5053 cut-off events. For 10693/10812 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37699 event pairs, 500 based on Foata normal form. 169/5161 useless extension candidates. Maximal degree in co-relation 16848. Up to 2139 conditions per place. [2023-11-06 23:07:43,425 INFO L140 encePairwiseOnDemand]: 161/171 looper letters, 124 selfloop transitions, 53 changer transitions 27/214 dead transitions. [2023-11-06 23:07:43,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 214 transitions, 1709 flow [2023-11-06 23:07:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:07:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:07:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 922 transitions. [2023-11-06 23:07:43,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599090318388564 [2023-11-06 23:07:43,430 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 922 transitions. [2023-11-06 23:07:43,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 922 transitions. [2023-11-06 23:07:43,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:07:43,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 922 transitions. [2023-11-06 23:07:43,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 102.44444444444444) internal successors, (922), 9 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,440 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,440 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 790 flow. Second operand 9 states and 922 transitions. [2023-11-06 23:07:43,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 214 transitions, 1709 flow [2023-11-06 23:07:43,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 214 transitions, 1688 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:07:43,538 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 980 flow [2023-11-06 23:07:43,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=980, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2023-11-06 23:07:43,540 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-11-06 23:07:43,540 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 980 flow [2023-11-06 23:07:43,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:43,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:43,541 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] [2023-11-06 23:07:43,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:07:43,541 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)] === [2023-11-06 23:07:43,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:43,542 INFO L85 PathProgramCache]: Analyzing trace with hash -198023906, now seen corresponding path program 1 times [2023-11-06 23:07:43,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:43,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362195370] [2023-11-06 23:07:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:43,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:07:43,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:07:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:07:43,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:07:43,613 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:07:43,614 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-11-06 23:07:43,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-06 23:07:43,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-06 23:07:43,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-11-06 23:07:43,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-11-06 23:07:43,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-06 23:07:43,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-06 23:07:43,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:07:43,618 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-06 23:07:43,624 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 23:07:43,625 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 23:07:43,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 11:07:43 BasicIcfg [2023-11-06 23:07:43,677 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 23:07:43,677 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 23:07:43,678 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 23:07:43,678 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 23:07:43,678 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:30" (3/4) ... [2023-11-06 23:07:43,679 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-06 23:07:43,775 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 23:07:43,775 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 23:07:43,778 INFO L158 Benchmark]: Toolchain (without parser) took 14146.13ms. Allocated memory was 138.4MB in the beginning and 599.8MB in the end (delta: 461.4MB). Free memory was 90.3MB in the beginning and 257.2MB in the end (delta: -166.9MB). Peak memory consumption was 295.5MB. Max. memory is 16.1GB. [2023-11-06 23:07:43,778 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 138.4MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:07:43,778 INFO L158 Benchmark]: CACSL2BoogieTranslator took 610.70ms. Allocated memory was 138.4MB in the beginning and 186.6MB in the end (delta: 48.2MB). Free memory was 90.3MB in the beginning and 154.4MB in the end (delta: -64.1MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. [2023-11-06 23:07:43,779 INFO L158 Benchmark]: Boogie Procedure Inliner took 93.96ms. Allocated memory is still 186.6MB. Free memory was 154.4MB in the beginning and 154.4MB in the end (delta: 9.9kB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2023-11-06 23:07:43,780 INFO L158 Benchmark]: Boogie Preprocessor took 59.55ms. Allocated memory is still 186.6MB. Free memory was 154.4MB in the beginning and 153.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 23:07:43,780 INFO L158 Benchmark]: RCFGBuilder took 528.26ms. Allocated memory is still 186.6MB. Free memory was 152.3MB in the beginning and 135.5MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-06 23:07:43,781 INFO L158 Benchmark]: TraceAbstraction took 12744.93ms. Allocated memory was 186.6MB in the beginning and 599.8MB in the end (delta: 413.1MB). Free memory was 135.5MB in the beginning and 264.5MB in the end (delta: -129.1MB). Peak memory consumption was 284.1MB. Max. memory is 16.1GB. [2023-11-06 23:07:43,781 INFO L158 Benchmark]: Witness Printer took 99.50ms. Allocated memory is still 599.8MB. Free memory was 263.5MB in the beginning and 257.2MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-06 23:07:43,784 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 138.4MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 610.70ms. Allocated memory was 138.4MB in the beginning and 186.6MB in the end (delta: 48.2MB). Free memory was 90.3MB in the beginning and 154.4MB in the end (delta: -64.1MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 93.96ms. Allocated memory is still 186.6MB. Free memory was 154.4MB in the beginning and 154.4MB in the end (delta: 9.9kB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.55ms. Allocated memory is still 186.6MB. Free memory was 154.4MB in the beginning and 153.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 528.26ms. Allocated memory is still 186.6MB. Free memory was 152.3MB in the beginning and 135.5MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 12744.93ms. Allocated memory was 186.6MB in the beginning and 599.8MB in the end (delta: 413.1MB). Free memory was 135.5MB in the beginning and 264.5MB in the end (delta: -129.1MB). Peak memory consumption was 284.1MB. Max. memory is 16.1GB. * Witness Printer took 99.50ms. Allocated memory is still 599.8MB. Free memory was 263.5MB in the beginning and 257.2MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 103 PlacesBefore, 50 PlacesAfterwards, 92 TransitionsBefore, 37 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 2 ChoiceCompositions, 61 TotalNumberOfCompositions, 7755 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3937, independent: 3725, independent conditional: 0, independent unconditional: 3725, dependent: 212, dependent conditional: 0, dependent unconditional: 212, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1337, independent: 1306, independent conditional: 0, independent unconditional: 1306, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3937, independent: 2419, independent conditional: 0, independent unconditional: 2419, dependent: 181, dependent conditional: 0, dependent unconditional: 181, unknown: 1337, unknown conditional: 0, unknown unconditional: 1337] , Statistics on independence cache: Total cache size (in pairs): 223, Positive cache size: 205, Positive conditional cache size: 0, Positive unconditional cache size: 205, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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 [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={5:0}, t2={7:0}, t3={8:0}, t4={6:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-2, r=0, t1={5:0}, t2={7:0}, t3={8:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; [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)) [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] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=-1, r=1, t1={5:0}, t2={7:0}, t3={8:0}, t4={6:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=1, t1={5:0}, t2={7:0}, t3={8:0}, t4={6:0}, w=0, x=0, y=0] [L724] 4 int l; [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 [L745] 2 return 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 [\result={0:0}, 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 [\result={0:0}, 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; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - 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: 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: 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. - 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 135 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: 12.5s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 654 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 554 mSDsluCounter, 153 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 86 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1422 IncrementalHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 67 mSDtfsCounter, 1422 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=980occurred in iteration=6, InterpolantAutomatonStates: 41, 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, 0.6s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 124 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! [2023-11-06 23:07:43,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90323b4-802a-4431-bf4b-a4c043d58680/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (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