./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 30e01a73 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_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:23:31,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:23:31,952 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:23:31,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:23:31,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:23:32,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:23:32,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:23:32,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:23:32,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:23:32,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:23:32,016 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:23:32,017 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:23:32,018 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:23:32,019 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:23:32,020 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:23:32,020 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:23:32,021 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:23:32,021 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:23:32,021 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:23:32,022 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:23:32,022 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:23:32,023 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:23:32,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:23:32,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:23:32,025 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:23:32,026 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:23:32,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:23:32,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:23:32,027 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:23:32,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:23:32,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:23:32,029 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:23:32,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:23:32,029 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:23:32,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:23:32,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:23:32,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:23:32,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:32,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:23:32,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:23:32,031 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:23:32,032 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:23:32,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:23:32,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:23:32,033 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:23:32,033 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:23:32,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:23:32,034 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2023-11-23 21:23:32,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:23:32,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:23:32,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:23:32,372 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:23:32,372 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:23:32,374 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-23 21:23:35,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:23:35,805 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:23:35,806 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-23 21:23:35,828 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/data/79c53f1a9/567c2c5d01a249718416d09098aac994/FLAG2867100e3 [2023-11-23 21:23:35,841 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/data/79c53f1a9/567c2c5d01a249718416d09098aac994 [2023-11-23 21:23:35,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:23:35,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:23:35,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:35,846 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:23:35,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:23:35,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:35" (1/1) ... [2023-11-23 21:23:35,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2dafe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:35, skipping insertion in model container [2023-11-23 21:23:35,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:35" (1/1) ... [2023-11-23 21:23:35,906 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:23:36,082 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:23:36,335 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_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-23 21:23:36,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:36,369 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:23:36,391 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:23:36,414 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_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-11-23 21:23:36,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:36,467 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:23:36,467 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:23:36,467 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:23:36,475 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:23:36,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36 WrapperNode [2023-11-23 21:23:36,476 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:36,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:36,478 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:23:36,478 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:23:36,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,531 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 118 [2023-11-23 21:23:36,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:36,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:23:36,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:23:36,533 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:23:36,541 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,551 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,551 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,559 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,579 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:23:36,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:23:36,587 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:23:36,587 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:23:36,588 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (1/1) ... [2023-11-23 21:23:36,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:36,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:23:36,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:23:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:23:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:23:36,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 21:23:36,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:23:36,679 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-23 21:23:36,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-23 21:23:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:23:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:23:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:23:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 21:23:36,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:23:36,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:23:36,682 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-23 21:23:36,682 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-23 21:23:36,684 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:23:36,859 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:23:36,861 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:23:37,103 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:23:37,261 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:23:37,262 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:23:37,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:37 BoogieIcfgContainer [2023-11-23 21:23:37,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:23:37,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:23:37,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:23:37,285 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:23:37,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:35" (1/3) ... [2023-11-23 21:23:37,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ba6c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:37, skipping insertion in model container [2023-11-23 21:23:37,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:36" (2/3) ... [2023-11-23 21:23:37,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ba6c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:37, skipping insertion in model container [2023-11-23 21:23:37,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:37" (3/3) ... [2023-11-23 21:23:37,288 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-11-23 21:23:37,297 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 21:23:37,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:23:37,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:23:37,309 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:23:37,372 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-23 21:23:37,404 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 57 transitions, 142 flow [2023-11-23 21:23:38,264 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 14084 states, 14081 states have (on average 4.011930970811732) internal successors, (56492), 14083 states have internal predecessors, (56492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:38,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:38,301 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d2c1bb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:38,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-23 21:23:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 14084 states, 14081 states have (on average 4.011930970811732) internal successors, (56492), 14083 states have internal predecessors, (56492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:23:38,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:38,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:38,428 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)] === [2023-11-23 21:23:38,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1937302976, now seen corresponding path program 1 times [2023-11-23 21:23:38,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:38,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789604111] [2023-11-23 21:23:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:39,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:39,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789604111] [2023-11-23 21:23:39,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789604111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:39,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:39,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:23:39,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491130448] [2023-11-23 21:23:39,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:39,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:39,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:39,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:39,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:39,164 INFO L87 Difference]: Start difference. First operand has 14084 states, 14081 states have (on average 4.011930970811732) internal successors, (56492), 14083 states have internal predecessors, (56492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:40,348 INFO L93 Difference]: Finished difference Result 28632 states and 109430 transitions. [2023-11-23 21:23:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:23:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-23 21:23:40,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:40,893 INFO L225 Difference]: With dead ends: 28632 [2023-11-23 21:23:40,894 INFO L226 Difference]: Without dead ends: 27024 [2023-11-23 21:23:40,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:23:40,900 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 306 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:40,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 238 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:23:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27024 states. [2023-11-23 21:23:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27024 to 17138. [2023-11-23 21:23:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17138 states, 17135 states have (on average 3.885205719288007) internal successors, (66573), 17137 states have internal predecessors, (66573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17138 states to 17138 states and 66573 transitions. [2023-11-23 21:23:42,313 INFO L78 Accepts]: Start accepts. Automaton has 17138 states and 66573 transitions. Word has length 12 [2023-11-23 21:23:42,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:42,314 INFO L495 AbstractCegarLoop]: Abstraction has 17138 states and 66573 transitions. [2023-11-23 21:23:42,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 17138 states and 66573 transitions. [2023-11-23 21:23:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:23:42,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:42,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:42,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:23:42,322 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)] === [2023-11-23 21:23:42,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1800922239, now seen corresponding path program 1 times [2023-11-23 21:23:42,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:42,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994221756] [2023-11-23 21:23:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:42,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:42,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:42,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994221756] [2023-11-23 21:23:42,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994221756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:42,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:42,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:42,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277687401] [2023-11-23 21:23:42,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:42,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:42,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:42,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:42,420 INFO L87 Difference]: Start difference. First operand 17138 states and 66573 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:42,978 INFO L93 Difference]: Finished difference Result 22662 states and 80723 transitions. [2023-11-23 21:23:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:23:42,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 21:23:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:43,350 INFO L225 Difference]: With dead ends: 22662 [2023-11-23 21:23:43,350 INFO L226 Difference]: Without dead ends: 22438 [2023-11-23 21:23:43,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:43,357 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 73 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:43,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 90 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22438 states. [2023-11-23 21:23:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22438 to 18446. [2023-11-23 21:23:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18446 states, 18436 states have (on average 3.6209047515730095) internal successors, (66755), 18445 states have internal predecessors, (66755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18446 states to 18446 states and 66755 transitions. [2023-11-23 21:23:44,605 INFO L78 Accepts]: Start accepts. Automaton has 18446 states and 66755 transitions. Word has length 15 [2023-11-23 21:23:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:44,606 INFO L495 AbstractCegarLoop]: Abstraction has 18446 states and 66755 transitions. [2023-11-23 21:23:44,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 18446 states and 66755 transitions. [2023-11-23 21:23:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:23:44,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:44,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:23:44,615 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)] === [2023-11-23 21:23:44,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -318990751, now seen corresponding path program 2 times [2023-11-23 21:23:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:44,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54707721] [2023-11-23 21:23:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:44,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54707721] [2023-11-23 21:23:44,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54707721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:44,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:44,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861016740] [2023-11-23 21:23:44,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:44,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:44,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:44,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:44,740 INFO L87 Difference]: Start difference. First operand 18446 states and 66755 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:44,894 INFO L93 Difference]: Finished difference Result 9256 states and 30714 transitions. [2023-11-23 21:23:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 21:23:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:44,943 INFO L225 Difference]: With dead ends: 9256 [2023-11-23 21:23:44,943 INFO L226 Difference]: Without dead ends: 9072 [2023-11-23 21:23:44,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:44,952 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 33 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:44,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 58 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9072 states. [2023-11-23 21:23:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9072 to 9072. [2023-11-23 21:23:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9072 states, 9064 states have (on average 3.3241394527802295) internal successors, (30130), 9071 states have internal predecessors, (30130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9072 states to 9072 states and 30130 transitions. [2023-11-23 21:23:45,351 INFO L78 Accepts]: Start accepts. Automaton has 9072 states and 30130 transitions. Word has length 15 [2023-11-23 21:23:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:45,351 INFO L495 AbstractCegarLoop]: Abstraction has 9072 states and 30130 transitions. [2023-11-23 21:23:45,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9072 states and 30130 transitions. [2023-11-23 21:23:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:23:45,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:45,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:45,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:23:45,356 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)] === [2023-11-23 21:23:45,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:45,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1241268126, now seen corresponding path program 1 times [2023-11-23 21:23:45,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:45,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989124476] [2023-11-23 21:23:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:45,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:45,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:45,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989124476] [2023-11-23 21:23:45,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989124476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:45,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:45,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:23:45,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986492999] [2023-11-23 21:23:45,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:45,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:45,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:45,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:45,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:45,472 INFO L87 Difference]: Start difference. First operand 9072 states and 30130 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:46,110 INFO L93 Difference]: Finished difference Result 11630 states and 37666 transitions. [2023-11-23 21:23:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:23:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-23 21:23:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:46,150 INFO L225 Difference]: With dead ends: 11630 [2023-11-23 21:23:46,151 INFO L226 Difference]: Without dead ends: 9564 [2023-11-23 21:23:46,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:23:46,152 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 262 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:46,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 215 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:23:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9564 states. [2023-11-23 21:23:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9564 to 7862. [2023-11-23 21:23:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7862 states, 7860 states have (on average 3.292111959287532) internal successors, (25876), 7861 states have internal predecessors, (25876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7862 states to 7862 states and 25876 transitions. [2023-11-23 21:23:46,547 INFO L78 Accepts]: Start accepts. Automaton has 7862 states and 25876 transitions. Word has length 16 [2023-11-23 21:23:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:46,548 INFO L495 AbstractCegarLoop]: Abstraction has 7862 states and 25876 transitions. [2023-11-23 21:23:46,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 7862 states and 25876 transitions. [2023-11-23 21:23:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:23:46,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:46,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:46,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:23:46,557 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)] === [2023-11-23 21:23:46,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash 812501596, now seen corresponding path program 1 times [2023-11-23 21:23:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:46,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420643771] [2023-11-23 21:23:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:46,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420643771] [2023-11-23 21:23:46,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420643771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:46,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:46,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:23:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311207443] [2023-11-23 21:23:46,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:46,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:46,735 INFO L87 Difference]: Start difference. First operand 7862 states and 25876 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:47,284 INFO L93 Difference]: Finished difference Result 9054 states and 29064 transitions. [2023-11-23 21:23:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:23:47,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-23 21:23:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:47,317 INFO L225 Difference]: With dead ends: 9054 [2023-11-23 21:23:47,317 INFO L226 Difference]: Without dead ends: 8420 [2023-11-23 21:23:47,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:23:47,319 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 159 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:47,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 170 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:23:47,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8420 states. [2023-11-23 21:23:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8420 to 6682. [2023-11-23 21:23:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6680 states have (on average 3.275748502994012) internal successors, (21882), 6681 states have internal predecessors, (21882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 21882 transitions. [2023-11-23 21:23:47,603 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 21882 transitions. Word has length 20 [2023-11-23 21:23:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:47,603 INFO L495 AbstractCegarLoop]: Abstraction has 6682 states and 21882 transitions. [2023-11-23 21:23:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 21882 transitions. [2023-11-23 21:23:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:23:47,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:47,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:47,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:23:47,615 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)] === [2023-11-23 21:23:47,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1173074978, now seen corresponding path program 1 times [2023-11-23 21:23:47,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:47,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871380755] [2023-11-23 21:23:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:47,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:47,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871380755] [2023-11-23 21:23:47,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871380755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:47,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:47,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:23:47,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208331017] [2023-11-23 21:23:47,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:47,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:47,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:47,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:47,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:47,766 INFO L87 Difference]: Start difference. First operand 6682 states and 21882 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:48,206 INFO L93 Difference]: Finished difference Result 7614 states and 24372 transitions. [2023-11-23 21:23:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:23:48,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-23 21:23:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:48,232 INFO L225 Difference]: With dead ends: 7614 [2023-11-23 21:23:48,232 INFO L226 Difference]: Without dead ends: 6674 [2023-11-23 21:23:48,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:23:48,234 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 153 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:48,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 163 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:23:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2023-11-23 21:23:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 5130. [2023-11-23 21:23:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5128 states have (on average 3.2585803432137284) internal successors, (16710), 5129 states have internal predecessors, (16710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 16710 transitions. [2023-11-23 21:23:48,445 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 16710 transitions. Word has length 20 [2023-11-23 21:23:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:48,446 INFO L495 AbstractCegarLoop]: Abstraction has 5130 states and 16710 transitions. [2023-11-23 21:23:48,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 16710 transitions. [2023-11-23 21:23:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:23:48,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:48,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:23:48,467 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)] === [2023-11-23 21:23:48,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1220641409, now seen corresponding path program 1 times [2023-11-23 21:23:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:48,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206140748] [2023-11-23 21:23:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:48,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:48,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:48,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206140748] [2023-11-23 21:23:48,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206140748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:48,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:48,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:23:48,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651453750] [2023-11-23 21:23:48,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:48,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:48,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:48,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:48,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:48,624 INFO L87 Difference]: Start difference. First operand 5130 states and 16710 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:48,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:48,824 INFO L93 Difference]: Finished difference Result 5802 states and 18774 transitions. [2023-11-23 21:23:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:23:48,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-23 21:23:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:48,843 INFO L225 Difference]: With dead ends: 5802 [2023-11-23 21:23:48,843 INFO L226 Difference]: Without dead ends: 5242 [2023-11-23 21:23:48,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:23:48,845 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:48,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 158 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2023-11-23 21:23:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4906. [2023-11-23 21:23:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4904 states have (on average 3.2247145187601958) internal successors, (15814), 4905 states have internal predecessors, (15814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 15814 transitions. [2023-11-23 21:23:49,081 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 15814 transitions. Word has length 28 [2023-11-23 21:23:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:49,082 INFO L495 AbstractCegarLoop]: Abstraction has 4906 states and 15814 transitions. [2023-11-23 21:23:49,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 15814 transitions. [2023-11-23 21:23:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:23:49,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:49,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:49,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:23:49,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 21:23:49,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash 12517524, now seen corresponding path program 1 times [2023-11-23 21:23:49,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:49,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992479969] [2023-11-23 21:23:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:49,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:49,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:49,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992479969] [2023-11-23 21:23:49,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992479969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:49,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:49,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:23:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801367335] [2023-11-23 21:23:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:49,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:49,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:49,206 INFO L87 Difference]: Start difference. First operand 4906 states and 15814 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:49,396 INFO L93 Difference]: Finished difference Result 5594 states and 17914 transitions. [2023-11-23 21:23:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:23:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-23 21:23:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:49,409 INFO L225 Difference]: With dead ends: 5594 [2023-11-23 21:23:49,410 INFO L226 Difference]: Without dead ends: 4570 [2023-11-23 21:23:49,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:23:49,411 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 90 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:49,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 170 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2023-11-23 21:23:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 4234. [2023-11-23 21:23:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4232 states have (on average 3.1545368620037806) internal successors, (13350), 4233 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 13350 transitions. [2023-11-23 21:23:49,526 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 13350 transitions. Word has length 28 [2023-11-23 21:23:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:49,526 INFO L495 AbstractCegarLoop]: Abstraction has 4234 states and 13350 transitions. [2023-11-23 21:23:49,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 13350 transitions. [2023-11-23 21:23:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:23:49,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:49,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:49,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:23:49,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 21:23:49,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:49,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1413922088, now seen corresponding path program 2 times [2023-11-23 21:23:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:49,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440682442] [2023-11-23 21:23:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:49,556 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:23:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:49,596 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:23:49,596 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:23:49,597 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-11-23 21:23:49,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-23 21:23:49,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-23 21:23:49,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-11-23 21:23:49,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-11-23 21:23:49,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-23 21:23:49,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-23 21:23:49,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:23:49,604 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2023-11-23 21:23:49,609 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-23 21:23:49,610 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:23:49,676 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated [2023-11-23 21:23:49,677 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-23 21:23:49,678 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-23 21:23:49,678 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated [2023-11-23 21:23:49,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:23:49 BasicIcfg [2023-11-23 21:23:49,689 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:23:49,690 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:23:49,690 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:23:49,690 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:23:49,691 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:37" (3/4) ... [2023-11-23 21:23:49,691 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-23 21:23:49,712 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated [2023-11-23 21:23:49,713 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-23 21:23:49,713 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-23 21:23:49,714 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated [2023-11-23 21:23:49,761 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 21:23:49,761 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:23:49,762 INFO L158 Benchmark]: Toolchain (without parser) took 13917.12ms. Allocated memory was 190.8MB in the beginning and 6.7GB in the end (delta: 6.5GB). Free memory was 149.3MB in the beginning and 6.0GB in the end (delta: -5.9GB). Peak memory consumption was 632.0MB. Max. memory is 16.1GB. [2023-11-23 21:23:49,762 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 132.1MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:23:49,762 INFO L158 Benchmark]: CACSL2BoogieTranslator took 630.25ms. Allocated memory is still 190.8MB. Free memory was 149.3MB in the beginning and 128.4MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-23 21:23:49,763 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.26ms. Allocated memory is still 190.8MB. Free memory was 128.4MB in the beginning and 126.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:23:49,763 INFO L158 Benchmark]: Boogie Preprocessor took 53.41ms. Allocated memory is still 190.8MB. Free memory was 126.3MB in the beginning and 124.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:23:49,764 INFO L158 Benchmark]: RCFGBuilder took 675.94ms. Allocated memory is still 190.8MB. Free memory was 124.7MB in the beginning and 98.5MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-11-23 21:23:49,764 INFO L158 Benchmark]: TraceAbstraction took 12407.82ms. Allocated memory was 190.8MB in the beginning and 6.7GB in the end (delta: 6.5GB). Free memory was 98.0MB in the beginning and 6.1GB in the end (delta: -6.0GB). Peak memory consumption was 571.1MB. Max. memory is 16.1GB. [2023-11-23 21:23:49,764 INFO L158 Benchmark]: Witness Printer took 71.39ms. Allocated memory is still 6.7GB. Free memory was 6.1GB in the beginning and 6.0GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-23 21:23:49,766 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 132.1MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 630.25ms. Allocated memory is still 190.8MB. Free memory was 149.3MB in the beginning and 128.4MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.26ms. Allocated memory is still 190.8MB. Free memory was 128.4MB in the beginning and 126.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.41ms. Allocated memory is still 190.8MB. Free memory was 126.3MB in the beginning and 124.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 675.94ms. Allocated memory is still 190.8MB. Free memory was 124.7MB in the beginning and 98.5MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 12407.82ms. Allocated memory was 190.8MB in the beginning and 6.7GB in the end (delta: 6.5GB). Free memory was 98.0MB in the beginning and 6.1GB in the end (delta: -6.0GB). Peak memory consumption was 571.1MB. Max. memory is 16.1GB. * Witness Printer took 71.39ms. Allocated memory is still 6.7GB. Free memory was 6.1GB in the beginning and 6.0GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 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 [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=0, t1={7:0}, t2={8:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; VAL [arg={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [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] [L724] 4 int l; VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [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] [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] 4 reach_error() VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 79 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 12.2s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.2s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1165 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1165 mSDsluCounter, 1262 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 823 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2352 IncrementalHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 439 mSDtfsCounter, 2352 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18446occurred in iteration=2, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 19534 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 146 ConstructedInterpolants, 0 QuantifiedInterpolants, 298 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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! [2023-11-23 21:23:49,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9c0de9-0082-41ee-af42-edc5cb1b7d8a/bin/utaipan-verify-mE87zJ7Ire/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