./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --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 3444bab46e3acd40907f623c997f9115bc97543a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:50:17,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:50:17,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:50:17,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:50:17,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:50:17,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:50:17,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:50:17,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:50:17,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:50:17,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:50:17,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:50:17,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:50:17,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:50:17,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:50:17,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:50:17,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:50:17,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:50:17,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:50:17,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:50:17,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:50:17,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:50:17,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:50:17,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:50:17,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:50:17,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:50:17,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:50:17,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:50:17,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:50:17,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:50:17,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:50:17,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:50:17,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:50:17,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:50:17,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:50:17,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:50:17,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:50:17,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:50:17,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:50:17,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:50:17,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:50:17,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:50:17,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:50:17,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:50:17,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:50:17,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:50:17,517 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:50:17,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:50:17,518 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:50:17,518 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:50:17,519 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:50:17,519 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:50:17,519 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:50:17,521 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:50:17,521 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:50:17,521 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:50:17,522 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:50:17,522 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:50:17,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:50:17,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:50:17,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:50:17,524 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:50:17,524 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:50:17,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:50:17,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:50:17,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:50:17,525 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:50:17,525 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:50:17,526 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:50:17,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:50:17,528 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:50:17,528 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:50:17,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:50:17,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:50:17,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:50:17,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:50:17,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:50:17,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:50:17,530 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:50:17,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:50:17,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:50:17,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:50:17,531 INFO L138 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_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3444bab46e3acd40907f623c997f9115bc97543a [2021-10-13 07:50:17,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:50:17,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:50:17,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:50:17,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:50:17,960 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:50:17,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2021-10-13 07:50:18,056 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/data/ad09c7e5c/23134df9005441f5b6f7ced010a3b591/FLAGc69ea2f87 [2021-10-13 07:50:18,788 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:50:18,788 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2021-10-13 07:50:18,805 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/data/ad09c7e5c/23134df9005441f5b6f7ced010a3b591/FLAGc69ea2f87 [2021-10-13 07:50:19,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/data/ad09c7e5c/23134df9005441f5b6f7ced010a3b591 [2021-10-13 07:50:19,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:50:19,042 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:50:19,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:50:19,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:50:19,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:50:19,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300fa482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19, skipping insertion in model container [2021-10-13 07:50:19,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:50:19,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:50:19,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:50:19,606 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:50:19,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:50:19,725 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:50:19,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19 WrapperNode [2021-10-13 07:50:19,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:50:19,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:50:19,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:50:19,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:50:19,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:50:19,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:50:19,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:50:19,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:50:19,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:50:19,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:50:19,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:50:19,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:50:19,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (1/1) ... [2021-10-13 07:50:19,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:50:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:50:19,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:50:19,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:50:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:50:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:50:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:50:19,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:50:20,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:50:20,262 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 07:50:20,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:20 BoogieIcfgContainer [2021-10-13 07:50:20,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:50:20,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:50:20,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:50:20,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:50:20,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:50:19" (1/3) ... [2021-10-13 07:50:20,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca1c528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:20, skipping insertion in model container [2021-10-13 07:50:20,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:19" (2/3) ... [2021-10-13 07:50:20,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca1c528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:20, skipping insertion in model container [2021-10-13 07:50:20,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:20" (3/3) ... [2021-10-13 07:50:20,290 INFO L111 eAbstractionObserver]: Analyzing ICFG cmp-freed-ptr.i [2021-10-13 07:50:20,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:50:20,312 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-13 07:50:20,400 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:50:20,410 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:50:20,410 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-13 07:50:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 22 states have internal predecessors, (23), 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) [2021-10-13 07:50:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 07:50:20,448 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:20,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 07:50:20,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 07:50:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1925, now seen corresponding path program 1 times [2021-10-13 07:50:20,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:20,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235572616] [2021-10-13 07:50:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:20,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:20,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:20,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235572616] [2021-10-13 07:50:20,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235572616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:20,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:20,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:50:20,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039368020] [2021-10-13 07:50:20,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:20,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:20,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:20,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:20,707 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 22 states have internal predecessors, (23), 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) [2021-10-13 07:50:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:20,748 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-13 07:50:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:20,750 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 [2021-10-13 07:50:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:20,760 INFO L225 Difference]: With dead ends: 22 [2021-10-13 07:50:20,761 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 07:50:20,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 07:50:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-13 07:50:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.75) internal successors, (21), 20 states have internal predecessors, (21), 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) [2021-10-13 07:50:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-10-13 07:50:20,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 2 [2021-10-13 07:50:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:20,806 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-10-13 07:50:20,806 INFO L471 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) [2021-10-13 07:50:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-10-13 07:50:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:50:20,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:20,808 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:50:20,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:50:20,808 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 07:50:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:20,812 INFO L82 PathProgramCache]: Analyzing trace with hash 59711, now seen corresponding path program 1 times [2021-10-13 07:50:20,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:20,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180280957] [2021-10-13 07:50:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:20,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:20,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:20,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180280957] [2021-10-13 07:50:20,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180280957] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:20,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:20,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:50:20,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544508328] [2021-10-13 07:50:20,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:20,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:20,888 INFO L87 Difference]: Start difference. First operand 21 states and 21 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) [2021-10-13 07:50:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:20,933 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-10-13 07:50:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:20,935 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 [2021-10-13 07:50:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:20,936 INFO L225 Difference]: With dead ends: 20 [2021-10-13 07:50:20,936 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 07:50:20,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 07:50:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-13 07:50:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 19 states have internal predecessors, (20), 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) [2021-10-13 07:50:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-13 07:50:20,944 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 3 [2021-10-13 07:50:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:20,945 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-13 07:50:20,946 INFO L471 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) [2021-10-13 07:50:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-13 07:50:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:50:20,947 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:20,948 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:50:20,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:50:20,949 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 07:50:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:20,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1851079, now seen corresponding path program 1 times [2021-10-13 07:50:20,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:20,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914423272] [2021-10-13 07:50:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:20,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:21,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:21,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914423272] [2021-10-13 07:50:21,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914423272] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:21,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:21,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:50:21,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399207510] [2021-10-13 07:50:21,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:21,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:21,035 INFO L87 Difference]: Start difference. First operand 20 states and 20 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) [2021-10-13 07:50:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:21,060 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-10-13 07:50:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:21,061 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 [2021-10-13 07:50:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:21,064 INFO L225 Difference]: With dead ends: 19 [2021-10-13 07:50:21,064 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 07:50:21,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 07:50:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 07:50:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 18 states have internal predecessors, (19), 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) [2021-10-13 07:50:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-13 07:50:21,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 4 [2021-10-13 07:50:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:21,071 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-13 07:50:21,072 INFO L471 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) [2021-10-13 07:50:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-13 07:50:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:50:21,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:21,073 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:50:21,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:50:21,073 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 07:50:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1778888490, now seen corresponding path program 1 times [2021-10-13 07:50:21,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:21,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667837517] [2021-10-13 07:50:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:21,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:21,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:21,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667837517] [2021-10-13 07:50:21,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667837517] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:21,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:21,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:50:21,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168177349] [2021-10-13 07:50:21,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:21,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:21,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:21,167 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:21,183 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-13 07:50:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:50:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:21,185 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:50:21,185 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:50:21,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:50:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 07:50:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-10-13 07:50:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-13 07:50:21,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 6 [2021-10-13 07:50:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:21,191 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-13 07:50:21,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-13 07:50:21,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:50:21,194 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:21,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:50:21,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:50:21,196 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 07:50:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash -689031604, now seen corresponding path program 1 times [2021-10-13 07:50:21,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:21,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841080738] [2021-10-13 07:50:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:21,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:21,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:21,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841080738] [2021-10-13 07:50:21,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841080738] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:21,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:21,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:50:21,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61052080] [2021-10-13 07:50:21,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:21,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:21,270 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:21,294 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-13 07:50:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:50:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:21,297 INFO L225 Difference]: With dead ends: 15 [2021-10-13 07:50:21,297 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 07:50:21,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 07:50:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 07:50:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-10-13 07:50:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-13 07:50:21,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2021-10-13 07:50:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:21,303 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-13 07:50:21,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:50:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-13 07:50:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:50:21,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:21,305 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:50:21,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:50:21,307 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 07:50:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash 114856812, now seen corresponding path program 1 times [2021-10-13 07:50:21,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:21,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114316550] [2021-10-13 07:50:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:21,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:21,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:21,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114316550] [2021-10-13 07:50:21,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114316550] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:21,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:21,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:50:21,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108678492] [2021-10-13 07:50:21,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:50:21,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:21,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:50:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:21,397 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-10-13 07:50:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:21,420 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-13 07:50:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:50:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) Word has length 8 [2021-10-13 07:50:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:21,422 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:50:21,422 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:50:21,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:50:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:50:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 07:50:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-10-13 07:50:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-13 07:50:21,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2021-10-13 07:50:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:21,432 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-13 07:50:21,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-10-13 07:50:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-13 07:50:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:50:21,434 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:21,434 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:50:21,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:50:21,435 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 07:50:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:21,436 INFO L82 PathProgramCache]: Analyzing trace with hash -734406065, now seen corresponding path program 1 times [2021-10-13 07:50:21,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:21,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76053874] [2021-10-13 07:50:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:21,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:50:21,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:50:21,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76053874] [2021-10-13 07:50:21,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76053874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:50:21,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:21,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:50:21,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059372667] [2021-10-13 07:50:21,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:50:21,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:50:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:50:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:50:21,541 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-10-13 07:50:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:50:21,596 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-13 07:50:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:50:21,597 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:50:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:50:21,598 INFO L225 Difference]: With dead ends: 16 [2021-10-13 07:50:21,598 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:50:21,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:50:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:50:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-13 07:50:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 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) [2021-10-13 07:50:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2021-10-13 07:50:21,600 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 9 [2021-10-13 07:50:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:50:21,600 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2021-10-13 07:50:21,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-10-13 07:50:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2021-10-13 07:50:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:50:21,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:50:21,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:50:21,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:50:21,602 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 07:50:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:50:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash -165933941, now seen corresponding path program 1 times [2021-10-13 07:50:21,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:50:21,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561790618] [2021-10-13 07:50:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:21,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:50:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:50:21,638 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:50:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:50:21,686 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:50:21,687 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:50:21,688 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,690 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:21,692 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:50:21,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:50:21,700 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:50:21,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:50:21 BoogieIcfgContainer [2021-10-13 07:50:21,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:50:21,729 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:50:21,729 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:50:21,729 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:50:21,730 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:20" (3/4) ... [2021-10-13 07:50:21,731 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:50:21,797 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:50:21,797 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:50:21,799 INFO L168 Benchmark]: Toolchain (without parser) took 2756.19 ms. Allocated memory was 83.9 MB in the beginning and 113.2 MB in the end (delta: 29.4 MB). Free memory was 45.6 MB in the beginning and 74.3 MB in the end (delta: -28.7 MB). Peak memory consumption was 989.5 kB. Max. memory is 16.1 GB. [2021-10-13 07:50:21,799 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 63.0 MB in the beginning and 62.9 MB in the end (delta: 57.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:21,800 INFO L168 Benchmark]: CACSL2BoogieTranslator took 679.59 ms. Allocated memory was 83.9 MB in the beginning and 113.2 MB in the end (delta: 29.4 MB). Free memory was 45.3 MB in the beginning and 84.3 MB in the end (delta: -39.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:21,803 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.10 ms. Allocated memory is still 113.2 MB. Free memory was 83.9 MB in the beginning and 82.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:21,803 INFO L168 Benchmark]: Boogie Preprocessor took 60.20 ms. Allocated memory is still 113.2 MB. Free memory was 82.2 MB in the beginning and 81.3 MB in the end (delta: 860.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:21,803 INFO L168 Benchmark]: RCFGBuilder took 415.50 ms. Allocated memory is still 113.2 MB. Free memory was 81.3 MB in the beginning and 70.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:21,804 INFO L168 Benchmark]: TraceAbstraction took 1447.17 ms. Allocated memory is still 113.2 MB. Free memory was 70.5 MB in the beginning and 75.8 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:21,804 INFO L168 Benchmark]: Witness Printer took 68.12 ms. Allocated memory is still 113.2 MB. Free memory was 75.8 MB in the beginning and 74.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:21,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 63.0 MB in the beginning and 62.9 MB in the end (delta: 57.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 679.59 ms. Allocated memory was 83.9 MB in the beginning and 113.2 MB in the end (delta: 29.4 MB). Free memory was 45.3 MB in the beginning and 84.3 MB in the end (delta: -39.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.10 ms. Allocated memory is still 113.2 MB. Free memory was 83.9 MB in the beginning and 82.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.20 ms. Allocated memory is still 113.2 MB. Free memory was 82.2 MB in the beginning and 81.3 MB in the end (delta: 860.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 415.50 ms. Allocated memory is still 113.2 MB. Free memory was 81.3 MB in the beginning and 70.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1447.17 ms. Allocated memory is still 113.2 MB. Free memory was 70.5 MB in the beginning and 75.8 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 68.12 ms. Allocated memory is still 113.2 MB. Free memory was 75.8 MB in the beginning and 74.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 554]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L543] struct T* x = ((void *)0); [L544] struct T* y = ((void *)0); [L545] y = malloc(sizeof(*y)) [L546] intptr_t adressY = (intptr_t) y; [L547] free(y) [L547] free(y) [L547] free(y) [L548] x = malloc(sizeof(*x)) [L549] intptr_t adressX = (intptr_t) x; [L550] COND TRUE adressX == adressY [L552] free(x) [L552] free(x) [L552] free(x) [L554] free(x) [L554] free(x) [L554] free(x) - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: 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, 23 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 1300.2ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 19.6ms, AutomataDifference: 308.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 90 SDtfs, 74 SDslu, 24 SDs, 0 SdLazy, 60 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 120.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52.8ms AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 45.7ms SsaConstructionTime, 155.5ms SatisfiabilityAnalysisTime, 332.3ms InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 117 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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! [2021-10-13 07:50:21,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3ad00b-d0c9-49c7-909d-fce41ea5496a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...