./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex3.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_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/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_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/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_2e09a27f-3962-4f31-983a-ddc2ef3ce124/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 33d006375056e7e3c58d58b776bed0fedce081ec4ff9e691f038a741177fe7dd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:20:59,466 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:20:59,555 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-23 21:20:59,560 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:20:59,561 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:20:59,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:20:59,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:20:59,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:20:59,588 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:20:59,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:20:59,589 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:20:59,590 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:20:59,591 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:20:59,591 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:20:59,592 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:20:59,592 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:20:59,593 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:20:59,593 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:20:59,594 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:20:59,594 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:20:59,595 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:20:59,601 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:20:59,601 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:20:59,602 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:20:59,602 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:20:59,603 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:20:59,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:20:59,603 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:20:59,604 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:20:59,604 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:20:59,605 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:20:59,605 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:20:59,606 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:20:59,606 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:20:59,606 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:20:59,607 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:20:59,607 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:20:59,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:20:59,608 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:20:59,608 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:20:59,609 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:20:59,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:20:59,611 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:20:59,611 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:20:59,612 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:20:59,612 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_2e09a27f-3962-4f31-983a-ddc2ef3ce124/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33d006375056e7e3c58d58b776bed0fedce081ec4ff9e691f038a741177fe7dd [2023-11-23 21:20:59,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:20:59,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:20:59,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:20:59,983 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:20:59,984 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:20:59,987 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex3.i [2023-11-23 21:21:03,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:21:03,457 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:21:03,457 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex3.i [2023-11-23 21:21:03,464 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/data/a7d5f2ead/be1577a8cba243ab8465558bac717ead/FLAGcb4a58799 [2023-11-23 21:21:03,478 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/data/a7d5f2ead/be1577a8cba243ab8465558bac717ead [2023-11-23 21:21:03,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:21:03,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:21:03,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:21:03,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:21:03,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:21:03,496 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,498 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6246cabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03, skipping insertion in model container [2023-11-23 21:21:03,498 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,527 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:21:03,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:21:03,742 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:21:03,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:21:03,775 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:21:03,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03 WrapperNode [2023-11-23 21:21:03,776 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:21:03,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:21:03,777 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:21:03,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:21:03,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,813 INFO L138 Inliner]: procedures = 11, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-11-23 21:21:03,813 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:21:03,814 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:21:03,814 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:21:03,815 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:21:03,823 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,847 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,855 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,856 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,857 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:21:03,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:21:03,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:21:03,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:21:03,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (1/1) ... [2023-11-23 21:21:03,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:21:03,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:21:03,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:21:03,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:21:03,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:21:03,952 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2023-11-23 21:21:03,952 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2023-11-23 21:21:03,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:21:03,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:21:03,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:21:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:21:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:21:04,036 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:21:04,039 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:21:04,271 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:21:04,332 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:21:04,333 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:21:04,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:04 BoogieIcfgContainer [2023-11-23 21:21:04,335 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:21:04,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:21:04,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:21:04,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:21:04,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:21:03" (1/3) ... [2023-11-23 21:21:04,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec9bc5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:04, skipping insertion in model container [2023-11-23 21:21:04,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:03" (2/3) ... [2023-11-23 21:21:04,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec9bc5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:04, skipping insertion in model container [2023-11-23 21:21:04,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:04" (3/3) ... [2023-11-23 21:21:04,346 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_malloc_ex3.i [2023-11-23 21:21:04,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:21:04,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-23 21:21:04,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:21:04,441 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;@3cc07427, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:21:04,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-11-23 21:21:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 16 states have (on average 2.0) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:21:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:21:04,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:04,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:21:04,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-23 21:21:04,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:04,459 INFO L85 PathProgramCache]: Analyzing trace with hash 88733, now seen corresponding path program 1 times [2023-11-23 21:21:04,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:04,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401510722] [2023-11-23 21:21:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:04,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:04,667 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 21:21:04,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:04,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401510722] [2023-11-23 21:21:04,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401510722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:04,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:04,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:21:04,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930618159] [2023-11-23 21:21:04,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:04,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:21:04,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:21:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:21:04,714 INFO L87 Difference]: Start difference. First operand has 34 states, 16 states have (on average 2.0) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 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 21:21:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:04,788 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-11-23 21:21:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:21:04,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 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 21:21:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:04,799 INFO L225 Difference]: With dead ends: 33 [2023-11-23 21:21:04,800 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 21:21:04,802 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 21:21:04,806 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:04,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:21:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 21:21:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-23 21:21:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.875) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:21:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-23 21:21:04,846 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 3 [2023-11-23 21:21:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:04,847 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-23 21:21:04,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 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 21:21:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-23 21:21:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:21:04,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:04,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:21:04,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:21:04,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-23 21:21:04,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash 88734, now seen corresponding path program 1 times [2023-11-23 21:21:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:04,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657263843] [2023-11-23 21:21:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:04,964 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 21:21:04,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:04,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657263843] [2023-11-23 21:21:04,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657263843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:04,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:04,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:21:04,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164275236] [2023-11-23 21:21:04,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:04,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:21:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:21:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:21:04,992 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 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 21:21:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:05,036 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-11-23 21:21:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:21:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 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 21:21:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:05,038 INFO L225 Difference]: With dead ends: 31 [2023-11-23 21:21:05,038 INFO L226 Difference]: Without dead ends: 31 [2023-11-23 21:21:05,038 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 21:21:05,040 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:05,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:21:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-23 21:21:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-23 21:21:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.8125) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:21:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-11-23 21:21:05,047 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 3 [2023-11-23 21:21:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:05,048 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-11-23 21:21:05,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 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 21:21:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-11-23 21:21:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:21:05,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:05,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:21:05,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:21:05,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-23 21:21:05,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:05,050 INFO L85 PathProgramCache]: Analyzing trace with hash 89454, now seen corresponding path program 1 times [2023-11-23 21:21:05,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:05,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645554025] [2023-11-23 21:21:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:05,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:05,069 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 21:21:05,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:05,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645554025] [2023-11-23 21:21:05,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645554025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:05,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:05,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:21:05,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898523619] [2023-11-23 21:21:05,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:05,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:21:05,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:05,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:21:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:21:05,073 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. 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 21:21:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:05,106 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-11-23 21:21:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:21:05,106 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 21:21:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:05,107 INFO L225 Difference]: With dead ends: 33 [2023-11-23 21:21:05,108 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 21:21:05,108 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 21:21:05,110 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:05,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:21:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 21:21:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-23 21:21:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:21:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-23 21:21:05,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 3 [2023-11-23 21:21:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:05,117 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-23 21:21:05,118 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 21:21:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-23 21:21:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:21:05,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:05,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:21:05,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:21:05,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-23 21:21:05,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1650873816, now seen corresponding path program 1 times [2023-11-23 21:21:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:05,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826413312] [2023-11-23 21:21:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:05,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:05,251 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 21:21:05,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:05,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826413312] [2023-11-23 21:21:05,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826413312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:05,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:05,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:21:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479995644] [2023-11-23 21:21:05,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:05,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:21:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:21:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:21:05,255 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:05,352 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-11-23 21:21:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:21:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 21:21:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:05,355 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:21:05,355 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:21:05,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:21:05,357 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:05,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 28 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:21:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:21:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-23 21:21:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:21:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-11-23 21:21:05,364 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 6 [2023-11-23 21:21:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:05,365 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-11-23 21:21:05,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-11-23 21:21:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:21:05,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:05,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:21:05,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:21:05,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-23 21:21:05,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1650873815, now seen corresponding path program 1 times [2023-11-23 21:21:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:05,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091219943] [2023-11-23 21:21:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:05,567 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 21:21:05,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091219943] [2023-11-23 21:21:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091219943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:05,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:05,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:21:05,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960611940] [2023-11-23 21:21:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:05,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:21:05,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:21:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:21:05,571 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:05,639 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-11-23 21:21:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:21:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 21:21:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:05,641 INFO L225 Difference]: With dead ends: 22 [2023-11-23 21:21:05,641 INFO L226 Difference]: Without dead ends: 22 [2023-11-23 21:21:05,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:21:05,643 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:05,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 18 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:21:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-23 21:21:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-23 21:21:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:21:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-11-23 21:21:05,649 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2023-11-23 21:21:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:05,650 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-11-23 21:21:05,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-11-23 21:21:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:21:05,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:05,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:05,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:21:05,652 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONMEMORY_FREE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-23 21:21:05,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2032281635, now seen corresponding path program 1 times [2023-11-23 21:21:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:05,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134689112] [2023-11-23 21:21:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:05,787 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 21:21:05,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:05,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134689112] [2023-11-23 21:21:05,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134689112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:05,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:05,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:21:05,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405626329] [2023-11-23 21:21:05,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:05,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:21:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:21:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:21:05,794 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:05,862 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-11-23 21:21:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:21:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 21:21:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:05,868 INFO L225 Difference]: With dead ends: 21 [2023-11-23 21:21:05,869 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 21:21:05,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:21:05,872 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:05,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 20 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:21:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 21:21:05,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 21:21:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:21:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-23 21:21:05,886 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2023-11-23 21:21:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:05,886 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-23 21:21:05,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:21:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-23 21:21:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:21:05,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:05,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:05,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:21:05,888 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-23 21:21:05,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2055586125, now seen corresponding path program 1 times [2023-11-23 21:21:05,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:05,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855723307] [2023-11-23 21:21:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:05,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:21:06,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:06,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855723307] [2023-11-23 21:21:06,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855723307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:21:06,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:21:06,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:21:06,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122660316] [2023-11-23 21:21:06,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:21:06,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:21:06,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:21:06,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:21:06,074 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:21:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:06,138 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-11-23 21:21:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:21:06,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-23 21:21:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:06,139 INFO L225 Difference]: With dead ends: 20 [2023-11-23 21:21:06,139 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 21:21:06,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:21:06,141 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:06,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:21:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 21:21:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 21:21:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 21:21:06,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 21:21:06,143 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2023-11-23 21:21:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:06,143 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 21:21:06,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:21:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 21:21:06,144 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 21:21:06,147 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2023-11-23 21:21:06,148 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2023-11-23 21:21:06,148 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2023-11-23 21:21:06,148 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-11-23 21:21:06,149 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr4ASSERT_VIOLATIONMEMORY_FREE (9 of 14 remaining) [2023-11-23 21:21:06,149 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr5ASSERT_VIOLATIONMEMORY_FREE (8 of 14 remaining) [2023-11-23 21:21:06,149 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr6ASSERT_VIOLATIONMEMORY_FREE (7 of 14 remaining) [2023-11-23 21:21:06,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2023-11-23 21:21:06,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2023-11-23 21:21:06,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2023-11-23 21:21:06,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2023-11-23 21:21:06,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2023-11-23 21:21:06,151 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2023-11-23 21:21:06,151 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2023-11-23 21:21:06,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:21:06,155 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:06,158 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:21:06,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:21:06 BoogieIcfgContainer [2023-11-23 21:21:06,161 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:21:06,162 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:21:06,162 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:21:06,163 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:21:06,163 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:04" (3/4) ... [2023-11-23 21:21:06,165 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 21:21:06,169 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure rec [2023-11-23 21:21:06,174 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-11-23 21:21:06,175 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-23 21:21:06,175 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-23 21:21:06,175 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-23 21:21:06,263 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 21:21:06,263 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/witness.yml [2023-11-23 21:21:06,264 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:21:06,264 INFO L158 Benchmark]: Toolchain (without parser) took 2781.84ms. Allocated memory is still 130.0MB. Free memory was 95.5MB in the beginning and 83.8MB in the end (delta: 11.8MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2023-11-23 21:21:06,265 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 130.0MB. Free memory is still 104.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:21:06,265 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.04ms. Allocated memory is still 130.0MB. Free memory was 95.1MB in the beginning and 85.5MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-23 21:21:06,266 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.54ms. Allocated memory is still 130.0MB. Free memory was 85.1MB in the beginning and 84.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:21:06,266 INFO L158 Benchmark]: Boogie Preprocessor took 45.66ms. Allocated memory is still 130.0MB. Free memory was 84.0MB in the beginning and 82.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:21:06,267 INFO L158 Benchmark]: RCFGBuilder took 474.39ms. Allocated memory is still 130.0MB. Free memory was 82.5MB in the beginning and 69.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:21:06,267 INFO L158 Benchmark]: TraceAbstraction took 1823.47ms. Allocated memory is still 130.0MB. Free memory was 69.0MB in the beginning and 88.0MB in the end (delta: -19.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:21:06,267 INFO L158 Benchmark]: Witness Printer took 101.65ms. Allocated memory is still 130.0MB. Free memory was 88.0MB in the beginning and 83.8MB in the end (delta: 4.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 21:21:06,269 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 130.0MB. Free memory is still 104.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.04ms. Allocated memory is still 130.0MB. Free memory was 95.1MB in the beginning and 85.5MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.54ms. Allocated memory is still 130.0MB. Free memory was 85.1MB in the beginning and 84.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.66ms. Allocated memory is still 130.0MB. Free memory was 84.0MB in the beginning and 82.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 474.39ms. Allocated memory is still 130.0MB. Free memory was 82.5MB in the beginning and 69.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1823.47ms. Allocated memory is still 130.0MB. Free memory was 69.0MB in the beginning and 88.0MB in the end (delta: -19.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 101.65ms. Allocated memory is still 130.0MB. Free memory was 88.0MB in the beginning and 83.8MB in the end (delta: 4.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 11]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 11]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 34 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 83 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 228 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 107 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 256 IncrementalHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 121 mSDtfsCounter, 256 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 214 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-23 21:21:06,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e09a27f-3962-4f31-983a-ddc2ef3ce124/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE