./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/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_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/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_f64417fb-86c1-4334-aa91-0e04d856d2ca/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 fd310154a8f082280317f3bf1f868dbee13522304c8e13d29736e7fb8b36c7cf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:56:37,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:56:37,358 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:56:37,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:56:37,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:56:37,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:56:37,392 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:56:37,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:56:37,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:56:37,394 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:56:37,394 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:56:37,395 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:56:37,395 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:56:37,396 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:56:37,397 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:56:37,397 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:56:37,398 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:56:37,398 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:56:37,399 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:56:37,400 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:56:37,400 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:56:37,401 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:56:37,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:56:37,403 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:56:37,403 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:56:37,404 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:56:37,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:56:37,405 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:56:37,406 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:56:37,406 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:56:37,407 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:56:37,407 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:56:37,408 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:56:37,408 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:56:37,409 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:56:37,409 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:56:37,410 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:56:37,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:37,411 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:56:37,411 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:56:37,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:56:37,412 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:56:37,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:56:37,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:56:37,413 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:56:37,414 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:56:37,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:56:37,414 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_f64417fb-86c1-4334-aa91-0e04d856d2ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd310154a8f082280317f3bf1f868dbee13522304c8e13d29736e7fb8b36c7cf [2023-11-24 23:56:37,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:56:37,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:56:37,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:56:37,734 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:56:37,735 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:56:37,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-11-24 23:56:41,118 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:56:41,420 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:56:41,421 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-11-24 23:56:41,441 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/data/156746025/ee2d817399b94f2db29c75030e1df6be/FLAG20a19b563 [2023-11-24 23:56:41,459 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/data/156746025/ee2d817399b94f2db29c75030e1df6be [2023-11-24 23:56:41,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:56:41,464 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:56:41,466 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:41,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:56:41,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:56:41,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:41" (1/1) ... [2023-11-24 23:56:41,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@941730d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:41, skipping insertion in model container [2023-11-24 23:56:41,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:41" (1/1) ... [2023-11-24 23:56:41,529 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:56:41,982 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_f64417fb-86c1-4334-aa91-0e04d856d2ca/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2023-11-24 23:56:41,995 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_f64417fb-86c1-4334-aa91-0e04d856d2ca/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2023-11-24 23:56:41,997 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_f64417fb-86c1-4334-aa91-0e04d856d2ca/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2023-11-24 23:56:42,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:42,013 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:56:42,061 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_f64417fb-86c1-4334-aa91-0e04d856d2ca/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2023-11-24 23:56:42,062 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_f64417fb-86c1-4334-aa91-0e04d856d2ca/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2023-11-24 23:56:42,063 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2023-11-24 23:56:42,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:42,104 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:56:42,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42 WrapperNode [2023-11-24 23:56:42,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:42,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:42,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:56:42,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:56:42,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,131 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,161 INFO L138 Inliner]: procedures = 139, calls = 56, calls flagged for inlining = 15, calls inlined = 14, statements flattened = 137 [2023-11-24 23:56:42,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:42,162 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:56:42,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:56:42,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:56:42,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,189 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:56:42,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:56:42,204 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:56:42,204 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:56:42,205 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (1/1) ... [2023-11-24 23:56:42,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:42,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:56:42,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:56:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-11-24 23:56:42,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-11-24 23:56:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:56:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-24 23:56:42,271 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-24 23:56:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:56:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:56:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-11-24 23:56:42,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-11-24 23:56:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:56:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:56:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:56:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:56:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-11-24 23:56:42,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-11-24 23:56:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:56:42,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:56:42,454 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:56:42,456 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:56:42,815 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:56:43,037 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:56:43,037 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:56:43,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:43 BoogieIcfgContainer [2023-11-24 23:56:43,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:56:43,042 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:56:43,043 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:56:43,052 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:56:43,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:56:41" (1/3) ... [2023-11-24 23:56:43,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a708be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:43, skipping insertion in model container [2023-11-24 23:56:43,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:42" (2/3) ... [2023-11-24 23:56:43,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a708be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:43, skipping insertion in model container [2023-11-24 23:56:43,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:43" (3/3) ... [2023-11-24 23:56:43,058 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unlock_at_exit.i [2023-11-24 23:56:43,084 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:56:43,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-24 23:56:43,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:56:43,163 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;@226df5f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:56:43,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-24 23:56:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-24 23:56:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:56:43,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:43,185 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 23:56:43,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:43,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:43,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1182694559, now seen corresponding path program 1 times [2023-11-24 23:56:43,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:43,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018745229] [2023-11-24 23:56:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:43,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:43,617 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 23:56:43,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:43,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018745229] [2023-11-24 23:56:43,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018745229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:43,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:43,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:43,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316644948] [2023-11-24 23:56:43,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:43,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:43,668 INFO L87 Difference]: Start difference. First operand has 45 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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 23:56:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:43,819 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2023-11-24 23:56:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:56:43,822 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 23:56:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:43,834 INFO L225 Difference]: With dead ends: 88 [2023-11-24 23:56:43,834 INFO L226 Difference]: Without dead ends: 47 [2023-11-24 23:56:43,838 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 23:56:43,844 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:43,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:56:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-24 23:56:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-24 23:56:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-24 23:56:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2023-11-24 23:56:43,897 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 19 [2023-11-24 23:56:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:43,898 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2023-11-24 23:56:43,898 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 23:56:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2023-11-24 23:56:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:56:43,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:43,901 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 23:56:43,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:56:43,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:43,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:43,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1243335529, now seen corresponding path program 1 times [2023-11-24 23:56:43,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:43,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849995034] [2023-11-24 23:56:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:44,399 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 23:56:44,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:44,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849995034] [2023-11-24 23:56:44,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849995034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:44,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:44,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:56:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209535489] [2023-11-24 23:56:44,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:44,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:56:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:56:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:44,413 INFO L87 Difference]: Start difference. First operand 47 states and 57 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 23:56:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:44,909 INFO L93 Difference]: Finished difference Result 133 states and 173 transitions. [2023-11-24 23:56:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:56:44,910 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 23:56:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:44,912 INFO L225 Difference]: With dead ends: 133 [2023-11-24 23:56:44,913 INFO L226 Difference]: Without dead ends: 92 [2023-11-24 23:56:44,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:56:44,916 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 54 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:44,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 127 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:56:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-24 23:56:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2023-11-24 23:56:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 49 states have internal predecessors, (55), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2023-11-24 23:56:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2023-11-24 23:56:44,981 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 20 [2023-11-24 23:56:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:44,981 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2023-11-24 23:56:44,982 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 23:56:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2023-11-24 23:56:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 23:56:44,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:44,988 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 23:56:44,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:56:44,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:44,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:44,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1897422196, now seen corresponding path program 1 times [2023-11-24 23:56:44,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:44,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716973912] [2023-11-24 23:56:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:56:48,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:48,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716973912] [2023-11-24 23:56:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716973912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8007002] [2023-11-24 23:56:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:48,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:48,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:48,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64417fb-86c1-4334-aa91-0e04d856d2ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:56:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:48,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 148 conjunts are in the unsatisfiable core [2023-11-24 23:56:48,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:49,019 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 6 treesize of output 5 [2023-11-24 23:56:49,414 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-24 23:56:49,414 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 23:56:50,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 67 [2023-11-24 23:56:50,775 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 0 case distinctions, treesize of input 77 treesize of output 69 [2023-11-24 23:56:50,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 60 [2023-11-24 23:56:50,837 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 0 case distinctions, treesize of input 81 treesize of output 73 [2023-11-24 23:56:50,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 56 [2023-11-24 23:56:50,900 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 0 case distinctions, treesize of input 77 treesize of output 69 [2023-11-24 23:56:50,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 49 [2023-11-24 23:56:50,969 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 0 case distinctions, treesize of input 49 treesize of output 46 [2023-11-24 23:56:51,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 53 [2023-11-24 23:56:51,019 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 0 case distinctions, treesize of input 53 treesize of output 50 [2023-11-24 23:56:51,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-24 23:56:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:56:51,085 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 32 treesize of output 17 [2023-11-24 23:56:51,099 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 23:56:51,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-24 23:56:51,125 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 0 case distinctions, treesize of input 21 treesize of output 24 [2023-11-24 23:56:57,094 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 23:56:57,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2023-11-24 23:56:57,116 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 23:56:57,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3