./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:39:36,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:39:36,293 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 20:39:36,299 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:39:36,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:39:36,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:39:36,352 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:39:36,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:39:36,354 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:39:36,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:39:36,355 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:39:36,359 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:39:36,360 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:39:36,364 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:39:36,365 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:39:36,365 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:39:36,367 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:39:36,368 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:39:36,368 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:39:36,369 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:39:36,369 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:39:36,370 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:39:36,371 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 20:39:36,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 20:39:36,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:39:36,372 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:39:36,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:39:36,373 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:39:36,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:39:36,393 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 20:39:36,394 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 20:39:36,394 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 20:39:36,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:39:36,395 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:39:36,396 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:39:36,396 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:39:36,396 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:39:36,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:39:36,397 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:39:36,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:39:36,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:39:36,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:39:36,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:39:36,399 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:39:36,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:39:36,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:39:36,400 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:39:36,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:39:36,400 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_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2023-11-23 20:39:36,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:39:36,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:39:36,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:39:36,702 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:39:36,702 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:39:36,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2023-11-23 20:39:39,860 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:39:40,195 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:39:40,196 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2023-11-23 20:39:40,221 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/data/f567159b1/de9738cdc6304b51958649d75b3df8b1/FLAGe48803e77 [2023-11-23 20:39:40,237 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/data/f567159b1/de9738cdc6304b51958649d75b3df8b1 [2023-11-23 20:39:40,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:39:40,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:39:40,250 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:39:40,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:39:40,256 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:39:40,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a429ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40, skipping insertion in model container [2023-11-23 20:39:40,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,321 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:39:40,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:39:40,758 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:39:40,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:39:40,892 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:39:40,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40 WrapperNode [2023-11-23 20:39:40,893 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:39:40,894 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:39:40,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:39:40,895 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:39:40,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,986 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2023-11-23 20:39:40,987 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:39:40,988 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:39:40,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:39:40,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:39:40,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,012 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,013 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,020 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,026 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:39:41,040 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:39:41,040 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:39:41,040 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:39:41,041 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:39:41,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:41,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:39:41,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:39:41,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:39:41,116 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2023-11-23 20:39:41,117 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2023-11-23 20:39:41,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:39:41,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:39:41,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:39:41,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:39:41,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:39:41,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:39:41,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:39:41,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:39:41,245 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:39:41,247 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:39:41,545 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:39:41,623 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:39:41,623 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:39:41,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:41 BoogieIcfgContainer [2023-11-23 20:39:41,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:39:41,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:39:41,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:39:41,633 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:39:41,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:39:40" (1/3) ... [2023-11-23 20:39:41,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1923a4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:41, skipping insertion in model container [2023-11-23 20:39:41,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (2/3) ... [2023-11-23 20:39:41,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1923a4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:41, skipping insertion in model container [2023-11-23 20:39:41,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:41" (3/3) ... [2023-11-23 20:39:41,636 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2023-11-23 20:39:41,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:39:41,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-23 20:39:41,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:39:41,727 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2ef2fdd4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:39:41,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-23 20:39:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:39:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:39:41,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:41,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 20:39:41,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:39:41,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash 131378568, now seen corresponding path program 1 times [2023-11-23 20:39:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414434406] [2023-11-23 20:39:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:41,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:42,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:42,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414434406] [2023-11-23 20:39:42,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414434406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:42,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:42,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:39:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222583508] [2023-11-23 20:39:42,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:42,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:39:42,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:39:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:39:42,158 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:42,398 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2023-11-23 20:39:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:39:42,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 20:39:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:42,416 INFO L225 Difference]: With dead ends: 106 [2023-11-23 20:39:42,416 INFO L226 Difference]: Without dead ends: 103 [2023-11-23 20:39:42,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:39:42,426 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 122 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:42,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 82 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:39:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-23 20:39:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2023-11-23 20:39:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 66 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-23 20:39:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2023-11-23 20:39:42,502 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 5 [2023-11-23 20:39:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:42,502 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2023-11-23 20:39:42,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2023-11-23 20:39:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:39:42,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:42,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 20:39:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:39:42,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:39:42,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash 131378569, now seen corresponding path program 1 times [2023-11-23 20:39:42,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:42,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048086180] [2023-11-23 20:39:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:42,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:42,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:42,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048086180] [2023-11-23 20:39:42,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048086180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:42,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:42,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:39:42,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587647474] [2023-11-23 20:39:42,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:42,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:39:42,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:39:42,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:39:42,721 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:42,892 INFO L93 Difference]: Finished difference Result 198 states and 266 transitions. [2023-11-23 20:39:42,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:39:42,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 20:39:42,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:42,896 INFO L225 Difference]: With dead ends: 198 [2023-11-23 20:39:42,896 INFO L226 Difference]: Without dead ends: 198 [2023-11-23 20:39:42,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:39:42,898 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 135 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:42,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 167 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-23 20:39:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2023-11-23 20:39:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 130 states have internal predecessors, (193), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-23 20:39:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 229 transitions. [2023-11-23 20:39:42,923 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 229 transitions. Word has length 5 [2023-11-23 20:39:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:42,923 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 229 transitions. [2023-11-23 20:39:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 229 transitions. [2023-11-23 20:39:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 20:39:42,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:42,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 20:39:42,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:39:42,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:39:42,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash -222231707, now seen corresponding path program 1 times [2023-11-23 20:39:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:42,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141023324] [2023-11-23 20:39:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:43,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:43,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141023324] [2023-11-23 20:39:43,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141023324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:43,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:43,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:39:43,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572061710] [2023-11-23 20:39:43,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:43,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:39:43,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:39:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:39:43,349 INFO L87 Difference]: Start difference. First operand 147 states and 229 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:43,575 INFO L93 Difference]: Finished difference Result 220 states and 317 transitions. [2023-11-23 20:39:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:39:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 20:39:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:43,580 INFO L225 Difference]: With dead ends: 220 [2023-11-23 20:39:43,581 INFO L226 Difference]: Without dead ends: 220 [2023-11-23 20:39:43,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:39:43,590 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:43,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 141 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:39:43,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-23 20:39:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 150. [2023-11-23 20:39:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 133 states have internal predecessors, (196), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-23 20:39:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 232 transitions. [2023-11-23 20:39:43,637 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 232 transitions. Word has length 6 [2023-11-23 20:39:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:43,637 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 232 transitions. [2023-11-23 20:39:43,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 232 transitions. [2023-11-23 20:39:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:39:43,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:43,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:43,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:39:43,639 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:39:43,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1700751720, now seen corresponding path program 1 times [2023-11-23 20:39:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795512048] [2023-11-23 20:39:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:43,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:43,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:43,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795512048] [2023-11-23 20:39:43,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795512048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:43,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:43,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:39:43,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675266103] [2023-11-23 20:39:43,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:43,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:39:43,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:39:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:39:43,930 INFO L87 Difference]: Start difference. First operand 150 states and 232 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:44,093 INFO L93 Difference]: Finished difference Result 200 states and 267 transitions. [2023-11-23 20:39:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:39:44,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 20:39:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:44,096 INFO L225 Difference]: With dead ends: 200 [2023-11-23 20:39:44,097 INFO L226 Difference]: Without dead ends: 200 [2023-11-23 20:39:44,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:39:44,109 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 135 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:44,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 158 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-23 20:39:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2023-11-23 20:39:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6724137931034482) internal successors, (194), 133 states have internal predecessors, (194), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-23 20:39:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 230 transitions. [2023-11-23 20:39:44,134 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 230 transitions. Word has length 7 [2023-11-23 20:39:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:44,135 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 230 transitions. [2023-11-23 20:39:44,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 230 transitions. [2023-11-23 20:39:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 20:39:44,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:44,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:44,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:39:44,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:39:44,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1183695815, now seen corresponding path program 1 times [2023-11-23 20:39:44,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:44,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759061390] [2023-11-23 20:39:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:44,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:44,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:44,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759061390] [2023-11-23 20:39:44,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759061390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:44,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:44,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:39:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808206222] [2023-11-23 20:39:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:44,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:39:44,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:39:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:39:44,245 INFO L87 Difference]: Start difference. First operand 150 states and 230 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:44,351 INFO L93 Difference]: Finished difference Result 227 states and 313 transitions. [2023-11-23 20:39:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:39:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 20:39:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:44,356 INFO L225 Difference]: With dead ends: 227 [2023-11-23 20:39:44,356 INFO L226 Difference]: Without dead ends: 227 [2023-11-23 20:39:44,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:39:44,357 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 110 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:44,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 142 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-23 20:39:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2023-11-23 20:39:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 142 states have (on average 1.6408450704225352) internal successors, (233), 160 states have internal predecessors, (233), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-23 20:39:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2023-11-23 20:39:44,388 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 8 [2023-11-23 20:39:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:44,388 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2023-11-23 20:39:44,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2023-11-23 20:39:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:39:44,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:44,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:44,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:39:44,390 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:39:44,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:44,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1960135350, now seen corresponding path program 1 times [2023-11-23 20:39:44,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:44,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680725501] [2023-11-23 20:39:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:44,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:44,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680725501] [2023-11-23 20:39:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680725501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:44,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:44,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:39:44,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98954318] [2023-11-23 20:39:44,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:44,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:39:44,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:44,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:39:44,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:39:44,532 INFO L87 Difference]: Start difference. First operand 178 states and 269 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:44,648 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2023-11-23 20:39:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:39:44,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 20:39:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:44,652 INFO L225 Difference]: With dead ends: 226 [2023-11-23 20:39:44,653 INFO L226 Difference]: Without dead ends: 226 [2023-11-23 20:39:44,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:39:44,655 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 179 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:44,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 167 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-23 20:39:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2023-11-23 20:39:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 155 states have (on average 1.6387096774193548) internal successors, (254), 174 states have internal predecessors, (254), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-23 20:39:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2023-11-23 20:39:44,675 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2023-11-23 20:39:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:44,675 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2023-11-23 20:39:44,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2023-11-23 20:39:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:39:44,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:44,676 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:44,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:39:44,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:39:44,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:44,678 INFO L85 PathProgramCache]: Analyzing trace with hash -519071088, now seen corresponding path program 1 times [2023-11-23 20:39:44,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:44,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182055559] [2023-11-23 20:39:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:44,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:44,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:44,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182055559] [2023-11-23 20:39:44,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182055559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:44,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531671552] [2023-11-23 20:39:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:44,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:44,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:44,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:39:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:44,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:39:44,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:45,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:39:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:45,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531671552] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:39:45,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1073166571] [2023-11-23 20:39:45,334 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-23 20:39:45,334 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:39:45,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:39:45,344 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:39:45,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:39:45,621 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 135 for LOIs [2023-11-23 20:39:50,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:39:56,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1073166571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:56,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:39:56,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 3, 3] total 16 [2023-11-23 20:39:56,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008057547] [2023-11-23 20:39:56,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:56,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:39:56,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:56,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:39:56,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:39:56,821 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:57,623 INFO L93 Difference]: Finished difference Result 186 states and 269 transitions. [2023-11-23 20:39:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:39:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 20:39:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:57,638 INFO L225 Difference]: With dead ends: 186 [2023-11-23 20:39:57,638 INFO L226 Difference]: Without dead ends: 186 [2023-11-23 20:39:57,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:39:57,639 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:57,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:39:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-23 20:39:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 177. [2023-11-23 20:39:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 140 states have (on average 1.5857142857142856) internal successors, (222), 159 states have internal predecessors, (222), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-23 20:39:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 258 transitions. [2023-11-23 20:39:57,657 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 258 transitions. Word has length 13 [2023-11-23 20:39:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:57,658 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 258 transitions. [2023-11-23 20:39:57,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 258 transitions. [2023-11-23 20:39:57,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:39:57,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:57,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:57,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:39:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:39:57,880 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:39:57,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash 378084965, now seen corresponding path program 1 times [2023-11-23 20:39:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115754000] [2023-11-23 20:39:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:57,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:57,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115754000] [2023-11-23 20:39:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115754000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483800384] [2023-11-23 20:39:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:57,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:57,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:57,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:57,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:39:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:58,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:39:58,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:58,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:39:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483800384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:39:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691703205] [2023-11-23 20:39:58,102 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:39:58,102 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:39:58,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:39:58,103 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:39:58,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:39:59,024 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 17 for LOIs [2023-11-23 20:39:59,339 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:40:01,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2744#(and (<= 4 (select |#length| 6)) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| 6) 0) |parse_input_#t~mem3#1.offset|) (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= (+ |parse_input_#t~mem3#1.offset| 1) (select |#length| |parse_input_#t~mem3#1.base|)) (<= 3 |parse_input_~input#1.base|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select (select |#memory_$Pointer$.base| 6) 0) |parse_input_#t~mem3#1.base|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.base| 4) (= |parse_input_~input#1.offset| 0) (= |parse_input_#in~input#1.offset| 0) (= (select |#valid| 6) 1))' at error location [2023-11-23 20:40:01,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:40:01,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:40:01,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-23 20:40:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870640692] [2023-11-23 20:40:01,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:40:01,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:40:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:40:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:40:01,724 INFO L87 Difference]: Start difference. First operand 177 states and 258 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:40:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:01,780 INFO L93 Difference]: Finished difference Result 283 states and 406 transitions. [2023-11-23 20:40:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:40:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-23 20:40:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:01,784 INFO L225 Difference]: With dead ends: 283 [2023-11-23 20:40:01,785 INFO L226 Difference]: Without dead ends: 283 [2023-11-23 20:40:01,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:40:01,786 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 82 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:01,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 149 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:40:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-23 20:40:01,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 214. [2023-11-23 20:40:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 175 states have (on average 1.5542857142857143) internal successors, (272), 196 states have internal predecessors, (272), 10 states have call successors, (10), 7 states have call predecessors, (10), 11 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-11-23 20:40:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 312 transitions. [2023-11-23 20:40:01,803 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 312 transitions. Word has length 21 [2023-11-23 20:40:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:01,804 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 312 transitions. [2023-11-23 20:40:01,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:40:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 312 transitions. [2023-11-23 20:40:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:40:01,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:01,806 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:01,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:02,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:02,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:40:02,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:02,029 INFO L85 PathProgramCache]: Analyzing trace with hash -986025474, now seen corresponding path program 1 times [2023-11-23 20:40:02,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:02,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211370909] [2023-11-23 20:40:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:02,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:40:02,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:02,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211370909] [2023-11-23 20:40:02,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211370909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:02,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824144032] [2023-11-23 20:40:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:02,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:02,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:02,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:02,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:40:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:02,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 20:40:02,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:40:02,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-23 20:40:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:40:02,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:40:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824144032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603570854] [2023-11-23 20:40:02,898 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-23 20:40:02,898 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:40:02,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:40:02,899 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:40:02,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:40:03,649 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 145 for LOIs [2023-11-23 20:40:05,633 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:40:19,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3345#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (= ~state~0 1) (<= 1 |#StackHeapBarrier|) (= 6 |~#commands~0.base|) (<= (select |#length| 6) 3) (= |parse_input_~input#1.base| 4) (= ~global~0.offset 0) (= |parse_input_#in~input#1.base| 4) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (= |old(~state~0)| 1) (= |parse_input_~input#1.offset| 0) (= |parse_input_#in~input#1.offset| 0) (= |old(#valid)| |#valid|) (= |old(~global~0.offset)| 0))' at error location [2023-11-23 20:40:19,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:40:19,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:40:19,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-11-23 20:40:19,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751940539] [2023-11-23 20:40:19,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:40:19,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 20:40:19,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 20:40:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=780, Unknown=1, NotChecked=0, Total=992 [2023-11-23 20:40:19,396 INFO L87 Difference]: Start difference. First operand 214 states and 312 transitions. Second operand has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:40:19,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:19,980 INFO L93 Difference]: Finished difference Result 283 states and 401 transitions. [2023-11-23 20:40:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:40:19,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-11-23 20:40:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:19,986 INFO L225 Difference]: With dead ends: 283 [2023-11-23 20:40:19,986 INFO L226 Difference]: Without dead ends: 283 [2023-11-23 20:40:19,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=334, Invalid=1305, Unknown=1, NotChecked=0, Total=1640 [2023-11-23 20:40:19,991 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 590 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:19,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 136 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:40:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-23 20:40:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 216. [2023-11-23 20:40:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 177 states have (on average 1.5197740112994351) internal successors, (269), 198 states have internal predecessors, (269), 10 states have call successors, (10), 7 states have call predecessors, (10), 11 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-11-23 20:40:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 309 transitions. [2023-11-23 20:40:20,014 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 309 transitions. Word has length 21 [2023-11-23 20:40:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:20,014 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 309 transitions. [2023-11-23 20:40:20,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:40:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 309 transitions. [2023-11-23 20:40:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 20:40:20,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:20,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:20,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:20,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 20:40:20,232 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-23 20:40:20,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1617290397, now seen corresponding path program 1 times [2023-11-23 20:40:20,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:20,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313323335] [2023-11-23 20:40:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:20,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:40:21,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313323335] [2023-11-23 20:40:21,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313323335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337025843] [2023-11-23 20:40:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:21,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:21,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:21,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc18da0-a716-4895-b9cf-56db1cbd2064/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:40:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:21,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 20:40:21,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:40:21,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-23 20:40:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:40:21,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:40:21,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337025843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:21,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504007473] [2023-11-23 20:40:21,828 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-23 20:40:21,829 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:40:21,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:40:21,829 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:40:21,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:40:22,306 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 145 for LOIs [2023-11-23 20:40:23,925 INFO L180 IcfgInterpreter]: Interpretation finished