./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91 --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 cee8df08ffad3eb9e493a0be0076215dd3a59bce6d2370397b3bb712a7fad867 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:51:27,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:51:27,377 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:51:27,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:51:27,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:51:27,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:51:27,414 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:51:27,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:51:27,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:51:27,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:51:27,417 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:51:27,418 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:51:27,418 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:51:27,419 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:51:27,420 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:51:27,420 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:51:27,421 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:51:27,422 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:51:27,422 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:51:27,423 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:51:27,423 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:51:27,424 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:51:27,425 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:51:27,426 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:51:27,426 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:51:27,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:51:27,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:51:27,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:51:27,429 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:51:27,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:51:27,430 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:51:27,430 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:51:27,431 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:51:27,432 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:51:27,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:51:27,433 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:51:27,433 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:51:27,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:51:27,434 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:51:27,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:51:27,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:51:27,436 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:51:27,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:51:27,437 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:51:27,437 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:51:27,438 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:51:27,438 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:51:27,439 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_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cee8df08ffad3eb9e493a0be0076215dd3a59bce6d2370397b3bb712a7fad867 [2023-11-24 23:51:27,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:51:27,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:51:27,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:51:27,748 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:51:27,749 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:51:27,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/ldv-sets/test_mutex.i [2023-11-24 23:51:31,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:51:31,460 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:51:31,460 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/sv-benchmarks/c/ldv-sets/test_mutex.i [2023-11-24 23:51:31,493 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/data/b547075bc/736dabd11cd3436f977911fb8d6a8935/FLAG06762a81b [2023-11-24 23:51:31,513 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/data/b547075bc/736dabd11cd3436f977911fb8d6a8935 [2023-11-24 23:51:31,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:51:31,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:51:31,525 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:51:31,525 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:51:31,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:51:31,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:51:31" (1/1) ... [2023-11-24 23:51:31,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625d138e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:31, skipping insertion in model container [2023-11-24 23:51:31,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:51:31" (1/1) ... [2023-11-24 23:51:31,636 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:51:31,989 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_b937bcee-6b47-4775-abb9-e79b07f002ea/sv-benchmarks/c/ldv-sets/test_mutex.i[25842,25855] [2023-11-24 23:51:31,995 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_b937bcee-6b47-4775-abb9-e79b07f002ea/sv-benchmarks/c/ldv-sets/test_mutex.i[25967,25980] [2023-11-24 23:51:31,997 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_b937bcee-6b47-4775-abb9-e79b07f002ea/sv-benchmarks/c/ldv-sets/test_mutex.i[26082,26095] [2023-11-24 23:51:32,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:51:32,015 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:51:32,079 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_b937bcee-6b47-4775-abb9-e79b07f002ea/sv-benchmarks/c/ldv-sets/test_mutex.i[25842,25855] [2023-11-24 23:51:32,080 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_b937bcee-6b47-4775-abb9-e79b07f002ea/sv-benchmarks/c/ldv-sets/test_mutex.i[25967,25980] [2023-11-24 23:51:32,081 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_b937bcee-6b47-4775-abb9-e79b07f002ea/sv-benchmarks/c/ldv-sets/test_mutex.i[26082,26095] [2023-11-24 23:51:32,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:51:32,126 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:51:32,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32 WrapperNode [2023-11-24 23:51:32,127 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:51:32,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:51:32,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:51:32,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:51:32,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,192 INFO L138 Inliner]: procedures = 139, calls = 57, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 138 [2023-11-24 23:51:32,197 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:51:32,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:51:32,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:51:32,199 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:51:32,210 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,219 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,244 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:51:32,250 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:51:32,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:51:32,251 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:51:32,252 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (1/1) ... [2023-11-24 23:51:32,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:51:32,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:32,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:51:32,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:51:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-11-24 23:51:32,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-11-24 23:51:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-24 23:51:32,356 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-24 23:51:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:51:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-24 23:51:32,357 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-24 23:51:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:51:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:51:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-11-24 23:51:32,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-11-24 23:51:32,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:51:32,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:51:32,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:51:32,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:51:32,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-11-24 23:51:32,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-11-24 23:51:32,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:51:32,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:51:32,512 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:51:32,514 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:51:32,860 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:51:33,071 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:51:33,071 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:51:33,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:51:33 BoogieIcfgContainer [2023-11-24 23:51:33,073 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:51:33,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:51:33,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:51:33,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:51:33,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:51:31" (1/3) ... [2023-11-24 23:51:33,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b14dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:51:33, skipping insertion in model container [2023-11-24 23:51:33,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:32" (2/3) ... [2023-11-24 23:51:33,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b14dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:51:33, skipping insertion in model container [2023-11-24 23:51:33,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:51:33" (3/3) ... [2023-11-24 23:51:33,091 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex.i [2023-11-24 23:51:33,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:51:33,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-24 23:51:33,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:51:33,165 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;@3751e62f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:51:33,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-24 23:51:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 32 states have internal predecessors, (39), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 23:51:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:51:33,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:33,182 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:33,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:33,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash -380833791, now seen corresponding path program 1 times [2023-11-24 23:51:33,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:33,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494413917] [2023-11-24 23:51:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:33,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:51:33,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:33,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494413917] [2023-11-24 23:51:33,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494413917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:33,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:33,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479017332] [2023-11-24 23:51:33,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:33,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:33,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:33,684 INFO L87 Difference]: Start difference. First operand has 49 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 32 states have internal predecessors, (39), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:51:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:33,785 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2023-11-24 23:51:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-11-24 23:51:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:33,797 INFO L225 Difference]: With dead ends: 96 [2023-11-24 23:51:33,798 INFO L226 Difference]: Without dead ends: 51 [2023-11-24 23:51:33,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:33,805 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:33,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-24 23:51:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-24 23:51:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2023-11-24 23:51:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-11-24 23:51:33,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 19 [2023-11-24 23:51:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:33,852 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-11-24 23:51:33,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:51:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-11-24 23:51:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:51:33,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:33,854 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:33,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:51:33,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:33,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:33,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1943186129, now seen corresponding path program 1 times [2023-11-24 23:51:33,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:33,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204785259] [2023-11-24 23:51:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:51:34,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:34,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204785259] [2023-11-24 23:51:34,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204785259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:34,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:34,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:51:34,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574404546] [2023-11-24 23:51:34,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:34,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:51:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:51:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:34,278 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:51:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:34,655 INFO L93 Difference]: Finished difference Result 145 states and 192 transitions. [2023-11-24 23:51:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:51:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-11-24 23:51:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:34,662 INFO L225 Difference]: With dead ends: 145 [2023-11-24 23:51:34,662 INFO L226 Difference]: Without dead ends: 100 [2023-11-24 23:51:34,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:51:34,665 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:34,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 147 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:51:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-24 23:51:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2023-11-24 23:51:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.24) internal successors, (62), 54 states have internal predecessors, (62), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2023-11-24 23:51:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2023-11-24 23:51:34,710 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 20 [2023-11-24 23:51:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:34,710 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2023-11-24 23:51:34,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:51:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2023-11-24 23:51:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 23:51:34,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:34,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:34,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:51:34,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:34,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1431664665, now seen corresponding path program 1 times [2023-11-24 23:51:34,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:34,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583432591] [2023-11-24 23:51:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:34,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:51:40,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:40,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583432591] [2023-11-24 23:51:40,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583432591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:40,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518025879] [2023-11-24 23:51:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:40,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:40,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:40,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:51:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:41,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 158 conjunts are in the unsatisfiable core [2023-11-24 23:51:41,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:41,406 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-24 23:51:41,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-24 23:51:41,651 INFO L349 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-11-24 23:51:41,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-11-24 23:51:42,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:51:42,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:42,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:42,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2023-11-24 23:51:42,840 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-11-24 23:51:42,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-11-24 23:51:42,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2023-11-24 23:51:42,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:42,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:51:42,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-24 23:51:42,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 23:51:42,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:42,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2023-11-24 23:51:42,920 INFO L349 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2023-11-24 23:51:42,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2023-11-24 23:51:42,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2023-11-24 23:51:42,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:51:42,942 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:42,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-11-24 23:51:42,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 23:51:42,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:51:42,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:51:42,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:42,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-11-24 23:51:42,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2023-11-24 23:51:43,015 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-11-24 23:51:43,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-11-24 23:51:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:51:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:51:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:51:43,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2023-11-24 23:51:43,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 23:51:43,418 INFO L349 Elim1Store]: treesize reduction 178, result has 28.2 percent of original size [2023-11-24 23:51:43,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 98 [2023-11-24 23:51:44,060 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2023-11-24 23:51:44,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 37 [2023-11-24 23:51:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:51:45,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:51:47,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-24 23:51:47,708 INFO L349 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2023-11-24 23:51:47,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 774 treesize of output 685 [2023-11-24 23:51:47,794 INFO L349 Elim1Store]: treesize reduction 42, result has 58.8 percent of original size [2023-11-24 23:51:47,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 259 treesize of output 286 [2023-11-24 23:51:47,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:51:47,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 493 treesize of output 429 [2023-11-24 23:51:48,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 23:51:48,223 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-24 23:51:48,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 23:51:48,277 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-24 23:51:48,786 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-24 23:51:48,828 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-24 23:51:48,847 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-24 23:51:48,937 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-24 23:51:48,970 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-24 23:51:49,192 INFO L349 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2023-11-24 23:51:49,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 85 [2023-11-24 23:51:49,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:51:49,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2023-11-24 23:51:49,278 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:49,287 INFO L349 Elim1Store]: treesize reduction 17, result has 26.1 percent of original size [2023-11-24 23:51:49,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 6 [2023-11-24 23:51:49,342 INFO L349 Elim1Store]: treesize reduction 68, result has 25.3 percent of original size [2023-11-24 23:51:49,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 87 [2023-11-24 23:51:49,368 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 23:51:49,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2023-11-24 23:51:49,415 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:49,417 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:49,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 23:51:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:51:49,438 INFO L349 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2023-11-24 23:51:49,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 23:51:49,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:51:49,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 86 [2023-11-24 23:51:49,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518025879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:49,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530586306] [2023-11-24 23:51:49,751 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-11-24 23:51:49,751 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:51:49,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:51:49,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:51:49,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:51:51,084 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 12 for LOIs [2023-11-24 23:51:51,657 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 76 for LOIs [2023-11-24 23:51:51,677 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 26 for LOIs [2023-11-24 23:51:51,691 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 16 for LOIs [2023-11-24 23:51:51,736 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:52:13,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '807#(and (exists ((|v_mutex_lock_#t~ret32#1_16| Int)) (and (<= 0 |v_mutex_lock_#t~ret32#1_16|) (<= |v_mutex_lock_#t~ret32#1_16| 1) (not (= |v_mutex_lock_#t~ret32#1_16| 0)))) (<= 1 |#StackHeapBarrier|) (= |mutex_lock_#in~m#1.offset| 0) (= |mutex_lock_#in~m#1.base| |mutex_lock_~m#1.base|) (= |~#mutexes~0.base| 3) (= |~#mutexes~0.offset| 0) (= |mutex_lock_~m#1.offset| 0))' at error location [2023-11-24 23:52:13,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:52:13,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:52:13,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2023-11-24 23:52:13,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735083418] [2023-11-24 23:52:13,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 23:52:13,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-24 23:52:13,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-24 23:52:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=6582, Unknown=20, NotChecked=0, Total=6972 [2023-11-24 23:52:13,263 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 37 states have internal predecessors, (56), 17 states have call successors, (18), 9 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-11-24 23:52:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:22,316 INFO L93 Difference]: Finished difference Result 209 states and 269 transitions. [2023-11-24 23:52:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-24 23:52:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 32 states have (on average 1.75) internal successors, (56), 37 states have internal predecessors, (56), 17 states have call successors, (18), 9 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 47 [2023-11-24 23:52:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:22,321 INFO L225 Difference]: With dead ends: 209 [2023-11-24 23:52:22,321 INFO L226 Difference]: Without dead ends: 165 [2023-11-24 23:52:22,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3334 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=889, Invalid=13371, Unknown=20, NotChecked=0, Total=14280 [2023-11-24 23:52:22,329 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 360 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 2937 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:22,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1095 Invalid, 3119 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [182 Valid, 2937 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-24 23:52:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-24 23:52:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 117. [2023-11-24 23:52:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 80 states have internal predecessors, (95), 23 states have call successors, (23), 13 states have call predecessors, (23), 18 states have return successors, (38), 23 states have call predecessors, (38), 23 states have call successors, (38) [2023-11-24 23:52:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2023-11-24 23:52:22,364 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 47 [2023-11-24 23:52:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:22,364 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2023-11-24 23:52:22,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 32 states have (on average 1.75) internal successors, (56), 37 states have internal predecessors, (56), 17 states have call successors, (18), 9 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-11-24 23:52:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2023-11-24 23:52:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 23:52:22,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:22,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:22,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:52:22,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b937bcee-6b47-4775-abb9-e79b07f002ea/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-24 23:52:22,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:22,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1765877673, now seen corresponding path program 1 times [2023-11-24 23:52:22,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:22,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169561315] [2023-11-24 23:52:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:22,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat