./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:25:36,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:25:36,497 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 07:25:36,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:25:36,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:25:36,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:25:36,555 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:25:36,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:25:36,557 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:25:36,557 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:25:36,558 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:25:36,558 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:25:36,559 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:25:36,574 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:25:36,574 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:25:36,575 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:25:36,575 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:25:36,576 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:25:36,576 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:25:36,576 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:25:36,577 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:25:36,583 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:25:36,584 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 07:25:36,584 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 07:25:36,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:25:36,585 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:25:36,585 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:25:36,585 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:25:36,586 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:25:36,586 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 07:25:36,586 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 07:25:36,586 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 07:25:36,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:25:36,589 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 07:25:36,590 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:25:36,590 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 07:25:36,590 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:25:36,591 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:25:36,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:25:36,592 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:25:36,592 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:25:36,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:25:36,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:25:36,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:25:36,595 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:25:36,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:25:36,595 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:25:36,595 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:25:36,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:25:36,596 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_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 [2024-11-09 07:25:36,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:25:37,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:25:37,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:25:37,028 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:25:37,028 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:25:37,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c Unable to find full path for "g++" [2024-11-09 07:25:39,131 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:25:39,398 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:25:39,398 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2024-11-09 07:25:39,409 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/data/8edcdbad9/92053b2b974d43ddb051664eaf10eeea/FLAG4e9d74fa4 [2024-11-09 07:25:39,435 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/data/8edcdbad9/92053b2b974d43ddb051664eaf10eeea [2024-11-09 07:25:39,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:25:39,441 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:25:39,445 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:25:39,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:25:39,453 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:25:39,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c965693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39, skipping insertion in model container [2024-11-09 07:25:39,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,475 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:25:39,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:25:39,725 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:25:39,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:25:39,758 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:25:39,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39 WrapperNode [2024-11-09 07:25:39,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:25:39,760 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:25:39,761 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:25:39,761 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:25:39,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,779 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,795 INFO L138 Inliner]: procedures = 10, calls = 6, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 16 [2024-11-09 07:25:39,795 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:25:39,796 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:25:39,796 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:25:39,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:25:39,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,815 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,818 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:25:39,822 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:25:39,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:25:39,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:25:39,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (1/1) ... [2024-11-09 07:25:39,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:25:39,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:25:39,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:25:39,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:25:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:25:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 07:25:39,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:25:39,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:25:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:25:40,016 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:25:40,019 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:25:40,190 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-09 07:25:40,190 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:25:40,244 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:25:40,244 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 07:25:40,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:25:40 BoogieIcfgContainer [2024-11-09 07:25:40,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:25:40,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:25:40,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:25:40,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:25:40,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:25:39" (1/3) ... [2024-11-09 07:25:40,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da36126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:25:40, skipping insertion in model container [2024-11-09 07:25:40,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:25:39" (2/3) ... [2024-11-09 07:25:40,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da36126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:25:40, skipping insertion in model container [2024-11-09 07:25:40,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:25:40" (3/3) ... [2024-11-09 07:25:40,264 INFO L112 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2024-11-09 07:25:40,282 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:25:40,282 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-09 07:25:40,335 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:25:40,344 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@762e9f6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:25:40,344 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-09 07:25:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 6 states have (on average 2.0) internal successors, (12), 12 states have internal predecessors, (12), 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) [2024-11-09 07:25:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-09 07:25:40,362 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:40,363 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-09 07:25:40,364 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-11-09 07:25:40,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1553, now seen corresponding path program 1 times [2024-11-09 07:25:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:40,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932890357] [2024-11-09 07:25:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:40,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:25:40,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:25:40,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932890357] [2024-11-09 07:25:40,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932890357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:25:40,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:25:40,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 07:25:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474778475] [2024-11-09 07:25:40,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:25:40,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:25:40,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:25:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:25:40,682 INFO L87 Difference]: Start difference. First operand has 13 states, 6 states have (on average 2.0) internal successors, (12), 12 states have internal predecessors, (12), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2024-11-09 07:25:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:25:40,719 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2024-11-09 07:25:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:25:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2024-11-09 07:25:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:25:40,729 INFO L225 Difference]: With dead ends: 12 [2024-11-09 07:25:40,729 INFO L226 Difference]: Without dead ends: 11 [2024-11-09 07:25:40,731 INFO L431 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 [2024-11-09 07:25:40,735 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:25:40,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:25:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-09 07:25:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-09 07:25:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 10 states have internal predecessors, (10), 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) [2024-11-09 07:25:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2024-11-09 07:25:40,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 2 [2024-11-09 07:25:40,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:25:40,767 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2024-11-09 07:25:40,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2024-11-09 07:25:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2024-11-09 07:25:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 07:25:40,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:40,769 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 07:25:40,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:25:40,770 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-11-09 07:25:40,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:40,771 INFO L85 PathProgramCache]: Analyzing trace with hash 48179, now seen corresponding path program 1 times [2024-11-09 07:25:40,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:40,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090297389] [2024-11-09 07:25:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:40,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:25:40,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:25:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090297389] [2024-11-09 07:25:40,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090297389] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:25:40,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:25:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 07:25:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379520879] [2024-11-09 07:25:40,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:25:40,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:25:40,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:25:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:25:40,895 INFO L87 Difference]: Start difference. First operand 11 states and 10 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) [2024-11-09 07:25:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:25:40,928 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2024-11-09 07:25:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:25:40,930 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 [2024-11-09 07:25:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:25:40,931 INFO L225 Difference]: With dead ends: 10 [2024-11-09 07:25:40,931 INFO L226 Difference]: Without dead ends: 10 [2024-11-09 07:25:40,932 INFO L431 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 [2024-11-09 07:25:40,933 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:25:40,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:25:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-09 07:25:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-09 07:25:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 6 states have (on average 1.5) internal successors, (9), 9 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) [2024-11-09 07:25:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2024-11-09 07:25:40,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 3 [2024-11-09 07:25:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:25:40,943 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2024-11-09 07:25:40,944 INFO L472 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) [2024-11-09 07:25:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2024-11-09 07:25:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 07:25:40,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:40,945 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 07:25:40,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:25:40,945 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-11-09 07:25:40,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:40,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1493587, now seen corresponding path program 1 times [2024-11-09 07:25:40,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:40,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485949789] [2024-11-09 07:25:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:25:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:25:41,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:25:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485949789] [2024-11-09 07:25:41,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485949789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:25:41,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:25:41,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 07:25:41,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308756377] [2024-11-09 07:25:41,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:25:41,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:25:41,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:25:41,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:25:41,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:25:41,090 INFO L87 Difference]: Start difference. First operand 10 states and 9 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2024-11-09 07:25:41,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:25:41,112 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2024-11-09 07:25:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:25:41,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2024-11-09 07:25:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:25:41,114 INFO L225 Difference]: With dead ends: 9 [2024-11-09 07:25:41,114 INFO L226 Difference]: Without dead ends: 9 [2024-11-09 07:25:41,115 INFO L431 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 [2024-11-09 07:25:41,119 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:25:41,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:25:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-09 07:25:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-09 07:25:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 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) [2024-11-09 07:25:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8 transitions. [2024-11-09 07:25:41,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 8 transitions. Word has length 4 [2024-11-09 07:25:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:25:41,129 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 8 transitions. [2024-11-09 07:25:41,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2024-11-09 07:25:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2024-11-09 07:25:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 07:25:41,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:25:41,131 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 07:25:41,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 07:25:41,132 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-11-09 07:25:41,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:25:41,137 INFO L85 PathProgramCache]: Analyzing trace with hash 46301674, now seen corresponding path program 1 times [2024-11-09 07:25:41,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:25:41,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098880099] [2024-11-09 07:25:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:25:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:25:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 07:25:41,175 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 07:25:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 07:25:41,223 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 07:25:41,224 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 07:25:41,226 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2024-11-09 07:25:41,229 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (4 of 6 remaining) [2024-11-09 07:25:41,230 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (3 of 6 remaining) [2024-11-09 07:25:41,231 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (2 of 6 remaining) [2024-11-09 07:25:41,232 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2024-11-09 07:25:41,233 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2024-11-09 07:25:41,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:25:41,238 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-09 07:25:41,255 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 07:25:41,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 07:25:41 BoogieIcfgContainer [2024-11-09 07:25:41,274 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 07:25:41,274 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 07:25:41,275 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 07:25:41,275 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 07:25:41,276 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:25:40" (3/4) ... [2024-11-09 07:25:41,277 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-09 07:25:41,319 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 07:25:41,320 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 07:25:41,321 INFO L158 Benchmark]: Toolchain (without parser) took 1879.48ms. Allocated memory was 125.8MB in the beginning and 159.4MB in the end (delta: 33.6MB). Free memory was 63.9MB in the beginning and 128.5MB in the end (delta: -64.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:25:41,321 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 99.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:25:41,322 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.31ms. Allocated memory was 125.8MB in the beginning and 159.4MB in the end (delta: 33.6MB). Free memory was 63.7MB in the beginning and 122.1MB in the end (delta: -58.4MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2024-11-09 07:25:41,322 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.96ms. Allocated memory is still 159.4MB. Free memory was 122.1MB in the beginning and 120.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 07:25:41,323 INFO L158 Benchmark]: Boogie Preprocessor took 25.00ms. Allocated memory is still 159.4MB. Free memory was 120.4MB in the beginning and 119.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 07:25:41,324 INFO L158 Benchmark]: RCFGBuilder took 424.24ms. Allocated memory is still 159.4MB. Free memory was 119.4MB in the beginning and 109.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-09 07:25:41,324 INFO L158 Benchmark]: TraceAbstraction took 1022.06ms. Allocated memory is still 159.4MB. Free memory was 107.9MB in the beginning and 129.6MB in the end (delta: -21.8MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. [2024-11-09 07:25:41,325 INFO L158 Benchmark]: Witness Printer took 45.37ms. Allocated memory is still 159.4MB. Free memory was 129.6MB in the beginning and 128.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:25:41,327 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 99.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 314.31ms. Allocated memory was 125.8MB in the beginning and 159.4MB in the end (delta: 33.6MB). Free memory was 63.7MB in the beginning and 122.1MB in the end (delta: -58.4MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.96ms. Allocated memory is still 159.4MB. Free memory was 122.1MB in the beginning and 120.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.00ms. Allocated memory is still 159.4MB. Free memory was 120.4MB in the beginning and 119.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 424.24ms. Allocated memory is still 159.4MB. Free memory was 119.4MB in the beginning and 109.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1022.06ms. Allocated memory is still 159.4MB. Free memory was 107.9MB in the beginning and 129.6MB in the end (delta: -21.8MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. * Witness Printer took 45.37ms. Allocated memory is still 159.4MB. Free memory was 129.6MB in the beginning and 128.5MB in the end (delta: 1.1MB). There was no memory consumed. 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 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); [L12] CALL freePointer(p) [L6] free(p) [L6] free(p) [L6] free(p) [L12] RET freePointer(p) [L14] p[0] = 1 - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 9]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25 IncrementalHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 14 mSDtfsCounter, 25 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 9, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be incorrect! [2024-11-09 07:25:41,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0d017c-da89-40f2-b434-acdc0f0dabdd/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)