./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strcasecmp.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/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_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strcasecmp.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/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 64bit --witnessprinter.graph.data.programhash 4b83d1547bf3dd46e9571984e7e0a13f5187eff03a7662628a99d75ecc5b0412 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:35,935 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:36,005 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-23 21:12:36,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:36,012 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:36,059 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:36,059 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:36,060 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:36,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:36,066 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:36,067 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:36,068 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:36,068 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:36,070 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:12:36,071 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:36,071 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:36,071 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:12:36,073 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:12:36,074 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:36,074 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:12:36,075 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:12:36,075 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:12:36,076 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:12:36,077 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:12:36,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:36,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:12:36,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:36,079 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:12:36,079 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:12:36,080 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:12:36,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:36,082 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:12:36,082 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:12:36,082 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:36,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:36,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:36,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:36,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:36,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:36,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:36,084 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:12:36,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:12:36,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:36,085 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:36,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:36,086 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_f24b68c4-233b-4864-b0d1-35cb41805e17/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b83d1547bf3dd46e9571984e7e0a13f5187eff03a7662628a99d75ecc5b0412 [2023-11-23 21:12:36,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:36,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:36,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:36,472 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:36,473 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:36,476 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/termination-dietlibc/strcasecmp.i [2023-11-23 21:12:39,629 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:39,910 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:39,911 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/sv-benchmarks/c/termination-dietlibc/strcasecmp.i [2023-11-23 21:12:39,926 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/data/0a8dff036/54bc0e5be05e4d52bfa76950e2a97a4b/FLAGf9ae95bf0 [2023-11-23 21:12:39,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/data/0a8dff036/54bc0e5be05e4d52bfa76950e2a97a4b [2023-11-23 21:12:39,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:39,946 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:39,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:39,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:39,963 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:39,964 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:39" (1/1) ... [2023-11-23 21:12:39,966 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d84efaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:39, skipping insertion in model container [2023-11-23 21:12:39,966 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:39" (1/1) ... [2023-11-23 21:12:40,032 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:40,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:40,376 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:40,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:40,481 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:40,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40 WrapperNode [2023-11-23 21:12:40,482 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:40,484 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:40,484 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:40,484 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:40,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,518 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,550 INFO L138 Inliner]: procedures = 114, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2023-11-23 21:12:40,550 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:40,551 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:40,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:40,552 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:40,562 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,580 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,600 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,610 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:40,613 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:40,614 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:40,614 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:40,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:40,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:40,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:12:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:12:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:12:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:12:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:40,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:40,793 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:40,796 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:41,044 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:12:41,222 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:12:41,222 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:12:41,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:41 BoogieIcfgContainer [2023-11-23 21:12:41,232 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:12:41,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:12:41,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:12:41,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:12:41,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:39" (1/3) ... [2023-11-23 21:12:41,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc50cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:41, skipping insertion in model container [2023-11-23 21:12:41,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40" (2/3) ... [2023-11-23 21:12:41,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc50cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:41, skipping insertion in model container [2023-11-23 21:12:41,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:41" (3/3) ... [2023-11-23 21:12:41,256 INFO L112 eAbstractionObserver]: Analyzing ICFG strcasecmp.i [2023-11-23 21:12:41,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:12:41,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-11-23 21:12:41,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:12:41,342 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;@16f41fcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:12:41,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-23 21:12:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 16 states have (on average 2.25) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:12:41,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:41,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:12:41,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:41,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash 133838, now seen corresponding path program 1 times [2023-11-23 21:12:41,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:41,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980612711] [2023-11-23 21:12:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:41,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:41,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:41,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980612711] [2023-11-23 21:12:41,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980612711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:41,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:41,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:12:41,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380577616] [2023-11-23 21:12:41,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:41,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:41,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:41,586 INFO L87 Difference]: Start difference. First operand has 30 states, 16 states have (on average 2.25) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:41,656 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-11-23 21:12:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-23 21:12:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:41,668 INFO L225 Difference]: With dead ends: 31 [2023-11-23 21:12:41,668 INFO L226 Difference]: Without dead ends: 29 [2023-11-23 21:12:41,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:41,674 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:41,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-23 21:12:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-23 21:12:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 2.0625) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-23 21:12:41,710 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 3 [2023-11-23 21:12:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:41,710 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-23 21:12:41,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-23 21:12:41,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:12:41,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:41,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:12:41,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:41,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:41,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash 4148158, now seen corresponding path program 1 times [2023-11-23 21:12:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:41,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281415080] [2023-11-23 21:12:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:41,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281415080] [2023-11-23 21:12:41,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281415080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:41,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:41,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443592060] [2023-11-23 21:12:41,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:41,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:41,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:41,806 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:41,847 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-23 21:12:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:41,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 21:12:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:41,849 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:12:41,849 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:12:41,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:41,852 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:41,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:12:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-23 21:12:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.9375) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-23 21:12:41,858 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 4 [2023-11-23 21:12:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:41,859 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-23 21:12:41,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-23 21:12:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:12:41,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:41,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:12:41,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:12:41,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:41,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash 4148159, now seen corresponding path program 1 times [2023-11-23 21:12:41,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:41,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110103830] [2023-11-23 21:12:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:42,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110103830] [2023-11-23 21:12:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110103830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:42,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:42,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:42,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368266583] [2023-11-23 21:12:42,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:42,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:42,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:42,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:42,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:42,223 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:42,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:42,367 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-23 21:12:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 21:12:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:42,372 INFO L225 Difference]: With dead ends: 29 [2023-11-23 21:12:42,372 INFO L226 Difference]: Without dead ends: 29 [2023-11-23 21:12:42,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:12:42,380 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:42,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 41 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-23 21:12:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-23 21:12:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-23 21:12:42,389 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 4 [2023-11-23 21:12:42,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:42,389 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-23 21:12:42,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-23 21:12:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:12:42,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:42,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:12:42,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:12:42,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:42,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash 4151641, now seen corresponding path program 1 times [2023-11-23 21:12:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:42,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890530456] [2023-11-23 21:12:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:42,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890530456] [2023-11-23 21:12:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890530456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:42,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:42,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:42,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550774317] [2023-11-23 21:12:42,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:42,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:42,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:42,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:42,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:42,641 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:42,700 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-23 21:12:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:12:42,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 21:12:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:42,702 INFO L225 Difference]: With dead ends: 28 [2023-11-23 21:12:42,703 INFO L226 Difference]: Without dead ends: 28 [2023-11-23 21:12:42,704 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 21:12:42,714 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:42,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:42,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-23 21:12:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-23 21:12:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-23 21:12:42,726 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 4 [2023-11-23 21:12:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:42,726 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-23 21:12:42,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-23 21:12:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:12:42,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:42,727 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-23 21:12:42,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:12:42,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:42,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:42,729 INFO L85 PathProgramCache]: Analyzing trace with hash -308490875, now seen corresponding path program 1 times [2023-11-23 21:12:42,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:42,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579510568] [2023-11-23 21:12:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:42,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:42,951 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 21:12:42,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579510568] [2023-11-23 21:12:42,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579510568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:12:42,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896441233] [2023-11-23 21:12:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:42,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:12:42,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:12:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:43,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:12:43,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:12:43,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:12:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:43,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:12:43,460 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 21:12:43,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896441233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:12:43,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196145054] [2023-11-23 21:12:43,481 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-23 21:12:43,481 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:12:43,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:12:43,492 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:12:43,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:12:43,887 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:12:44,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '322#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 2 |ULTIMATE.start_main_~in~0#1.base|) (<= (select |#length| |ULTIMATE.start_main_~in~0#1.base|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet9#1|)) (<= |ULTIMATE.start_main_#t~nondet9#1| 127) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~in_len~0#1|))' at error location [2023-11-23 21:12:44,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:12:44,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:12:44,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-23 21:12:44,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133678070] [2023-11-23 21:12:44,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:12:44,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:12:44,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:44,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:12:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:12:44,188 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:44,392 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-11-23 21:12:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:12:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 21:12:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:44,394 INFO L225 Difference]: With dead ends: 28 [2023-11-23 21:12:44,394 INFO L226 Difference]: Without dead ends: 28 [2023-11-23 21:12:44,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:12:44,395 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:44,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-23 21:12:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-11-23 21:12:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.8125) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-23 21:12:44,400 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 6 [2023-11-23 21:12:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:44,401 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-23 21:12:44,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-23 21:12:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:12:44,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:44,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:12:44,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:12:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:44,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:44,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -305154631, now seen corresponding path program 1 times [2023-11-23 21:12:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:44,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043850083] [2023-11-23 21:12:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:44,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:44,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043850083] [2023-11-23 21:12:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043850083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:44,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:44,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237980516] [2023-11-23 21:12:44,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:44,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:44,740 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:44,783 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-23 21:12:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:12:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 21:12:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:44,784 INFO L225 Difference]: With dead ends: 26 [2023-11-23 21:12:44,785 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:12:44,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:44,786 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:44,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:12:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 21:12:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-23 21:12:44,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 6 [2023-11-23 21:12:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:44,790 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-23 21:12:44,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-23 21:12:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:12:44,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:44,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:44,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:12:44,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:44,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:44,793 INFO L85 PathProgramCache]: Analyzing trace with hash -869856528, now seen corresponding path program 1 times [2023-11-23 21:12:44,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:44,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727905840] [2023-11-23 21:12:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:44,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:44,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:44,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727905840] [2023-11-23 21:12:44,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727905840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:44,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:44,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665360915] [2023-11-23 21:12:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:44,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:44,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:44,830 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:44,864 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-11-23 21:12:44,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:44,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:12:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:44,865 INFO L225 Difference]: With dead ends: 23 [2023-11-23 21:12:44,866 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 21:12:44,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:44,867 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:44,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 21:12:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-23 21:12:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-23 21:12:44,871 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7 [2023-11-23 21:12:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:44,871 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-23 21:12:44,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-23 21:12:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:12:44,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:44,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:44,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:12:44,873 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:44,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:44,873 INFO L85 PathProgramCache]: Analyzing trace with hash -869856527, now seen corresponding path program 1 times [2023-11-23 21:12:44,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:44,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778834444] [2023-11-23 21:12:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:45,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:45,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778834444] [2023-11-23 21:12:45,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778834444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:45,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:45,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:12:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340456250] [2023-11-23 21:12:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:12:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:12:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:12:45,045 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:45,226 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-23 21:12:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:12:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:12:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:45,230 INFO L225 Difference]: With dead ends: 41 [2023-11-23 21:12:45,230 INFO L226 Difference]: Without dead ends: 41 [2023-11-23 21:12:45,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:12:45,232 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 93 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:45,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-23 21:12:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2023-11-23 21:12:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-23 21:12:45,243 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2023-11-23 21:12:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:45,244 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-23 21:12:45,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-23 21:12:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:12:45,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:45,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:12:45,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:45,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1586559054, now seen corresponding path program 1 times [2023-11-23 21:12:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:45,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092161329] [2023-11-23 21:12:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:45,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:45,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:45,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092161329] [2023-11-23 21:12:45,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092161329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:45,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:45,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911460663] [2023-11-23 21:12:45,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:45,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:45,291 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:45,317 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-23 21:12:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:45,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:12:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:45,319 INFO L225 Difference]: With dead ends: 25 [2023-11-23 21:12:45,319 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:12:45,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:45,320 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:45,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:12:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 21:12:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-23 21:12:45,323 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2023-11-23 21:12:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:45,324 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-23 21:12:45,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-23 21:12:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:12:45,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:45,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:45,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:12:45,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:45,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1586559055, now seen corresponding path program 1 times [2023-11-23 21:12:45,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:45,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884584327] [2023-11-23 21:12:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:45,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:45,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:45,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884584327] [2023-11-23 21:12:45,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884584327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:45,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:12:45,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320261090] [2023-11-23 21:12:45,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:45,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:12:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:45,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:12:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:12:45,505 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:45,637 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-23 21:12:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:12:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:12:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:45,638 INFO L225 Difference]: With dead ends: 33 [2023-11-23 21:12:45,639 INFO L226 Difference]: Without dead ends: 33 [2023-11-23 21:12:45,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:12:45,640 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:45,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 17 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-23 21:12:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-11-23 21:12:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-23 21:12:45,645 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2023-11-23 21:12:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:45,645 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-23 21:12:45,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-23 21:12:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:12:45,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:45,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:45,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:12:45,647 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-23 21:12:45,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1584267770, now seen corresponding path program 1 times [2023-11-23 21:12:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935618734] [2023-11-23 21:12:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:45,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:12:45,678 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:12:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:12:45,715 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:12:45,727 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:12:45,728 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2023-11-23 21:12:45,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-11-23 21:12:45,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-23 21:12:45,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-11-23 21:12:45,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-23 21:12:45,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-23 21:12:45,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-11-23 21:12:45,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-11-23 21:12:45,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-23 21:12:45,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2023-11-23 21:12:45,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-11-23 21:12:45,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-23 21:12:45,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-11-23 21:12:45,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:12:45,737 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:45,741 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:12:45,751 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc7 [2023-11-23 21:12:45,754 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-23 21:12:45,755 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc11 [2023-11-23 21:12:45,755 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc7 [2023-11-23 21:12:45,756 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc7 [2023-11-23 21:12:45,756 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc11 [2023-11-23 21:12:45,756 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-23 21:12:45,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:12:45 BoogieIcfgContainer [2023-11-23 21:12:45,761 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:12:45,762 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:12:45,762 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:12:45,762 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:12:45,762 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:41" (3/4) ... [2023-11-23 21:12:45,763 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-23 21:12:45,767 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc7 [2023-11-23 21:12:45,768 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-23 21:12:45,768 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc11 [2023-11-23 21:12:45,768 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc7 [2023-11-23 21:12:45,768 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc7 [2023-11-23 21:12:45,769 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc11 [2023-11-23 21:12:45,769 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-23 21:12:45,799 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f24b68c4-233b-4864-b0d1-35cb41805e17/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 21:12:45,800 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:12:45,800 INFO L158 Benchmark]: Toolchain (without parser) took 5854.26ms. Allocated memory was 134.2MB in the beginning and 184.5MB in the end (delta: 50.3MB). Free memory was 87.7MB in the beginning and 75.9MB in the end (delta: 11.8MB). Peak memory consumption was 64.2MB. Max. memory is 16.1GB. [2023-11-23 21:12:45,800 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 134.2MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:12:45,801 INFO L158 Benchmark]: CACSL2BoogieTranslator took 534.92ms. Allocated memory is still 134.2MB. Free memory was 87.3MB in the beginning and 70.6MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-23 21:12:45,801 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.03ms. Allocated memory is still 134.2MB. Free memory was 70.6MB in the beginning and 68.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:12:45,801 INFO L158 Benchmark]: Boogie Preprocessor took 61.69ms. Allocated memory is still 134.2MB. Free memory was 68.7MB in the beginning and 67.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:12:45,802 INFO L158 Benchmark]: RCFGBuilder took 618.72ms. Allocated memory was 134.2MB in the beginning and 184.5MB in the end (delta: 50.3MB). Free memory was 67.1MB in the beginning and 153.3MB in the end (delta: -86.2MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. [2023-11-23 21:12:45,802 INFO L158 Benchmark]: TraceAbstraction took 4526.10ms. Allocated memory is still 184.5MB. Free memory was 153.3MB in the beginning and 78.0MB in the end (delta: 75.3MB). Peak memory consumption was 76.2MB. Max. memory is 16.1GB. [2023-11-23 21:12:45,803 INFO L158 Benchmark]: Witness Printer took 37.99ms. Allocated memory is still 184.5MB. Free memory was 78.0MB in the beginning and 75.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:12:45,804 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 134.2MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 534.92ms. Allocated memory is still 134.2MB. Free memory was 87.3MB in the beginning and 70.6MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.03ms. Allocated memory is still 134.2MB. Free memory was 70.6MB in the beginning and 68.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.69ms. Allocated memory is still 134.2MB. Free memory was 68.7MB in the beginning and 67.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 618.72ms. Allocated memory was 134.2MB in the beginning and 184.5MB in the end (delta: 50.3MB). Free memory was 67.1MB in the beginning and 153.3MB in the end (delta: -86.2MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. * TraceAbstraction took 4526.10ms. Allocated memory is still 184.5MB. Free memory was 153.3MB in the beginning and 78.0MB in the end (delta: 75.3MB). Peak memory consumption was 76.2MB. Max. memory is 16.1GB. * Witness Printer took 37.99ms. Allocated memory is still 184.5MB. Free memory was 78.0MB in the beginning and 75.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc7 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc11 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc7 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc7 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc11 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc7 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc11 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc7 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc7 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc11 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int in_len = __VERIFIER_nondet_int(); [L524] COND FALSE !(in_len < 1) [L525] char* in = __builtin_alloca (in_len); [L526] int i=0; VAL [i=0, in={3:0}, in_len=1] [L526] COND FALSE !(i