./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI --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 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:20:23,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:20:23,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:20:23,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:20:23,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:20:23,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:20:23,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:20:23,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:20:23,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:20:23,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:20:23,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:20:23,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:20:23,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:20:23,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:20:23,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:20:23,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:20:23,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:20:23,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:20:23,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:20:23,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:20:23,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:20:23,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:20:23,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:20:23,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:20:23,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:20:23,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:20:23,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:20:23,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:20:23,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:20:23,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:20:23,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:20:23,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:20:23,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:20:23,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:20:23,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:20:23,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:20:23,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:20:23,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:20:23,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:20:23,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:20:23,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:20:23,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:20:23,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:20:23,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:20:23,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:20:23,388 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:20:23,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:20:23,389 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:20:23,389 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:20:23,389 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:20:23,390 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:20:23,390 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:20:23,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:20:23,390 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:20:23,391 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:20:23,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:20:23,391 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:20:23,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:20:23,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:20:23,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:20:23,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:20:23,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:20:23,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:20:23,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:20:23,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:20:23,394 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:20:23,395 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:20:23,395 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:20:23,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:20:23,396 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:20:23,396 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:20:23,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:20:23,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:20:23,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:20:23,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:20:23,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:20:23,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:20:23,398 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:20:23,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:20:23,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:20:23,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:20:23,399 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_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2021-10-11 02:20:23,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:20:23,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:20:23,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:20:23,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:20:23,743 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:20:23,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-11 02:20:23,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/data/fa0c7de2f/692c96eb060741178f331ed76c407b58/FLAGb61de12da [2021-10-11 02:20:24,488 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:20:24,489 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-11 02:20:24,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/data/fa0c7de2f/692c96eb060741178f331ed76c407b58/FLAGb61de12da [2021-10-11 02:20:24,735 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/data/fa0c7de2f/692c96eb060741178f331ed76c407b58 [2021-10-11 02:20:24,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:20:24,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:20:24,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:20:24,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:20:24,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:20:24,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:20:24" (1/1) ... [2021-10-11 02:20:24,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db0c0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:24, skipping insertion in model container [2021-10-11 02:20:24,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:20:24" (1/1) ... [2021-10-11 02:20:24,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:20:24,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:20:25,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:20:25,244 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:20:25,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:20:25,402 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:20:25,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25 WrapperNode [2021-10-11 02:20:25,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:20:25,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:20:25,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:20:25,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:20:25,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:20:25,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:20:25,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:20:25,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:20:25,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... [2021-10-11 02:20:25,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:20:25,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:20:25,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:20:25,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:20:25,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:20:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:20:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:20:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:20:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:20:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:20:25,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:20:26,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:20:26,395 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:20:26,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:26 BoogieIcfgContainer [2021-10-11 02:20:26,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:20:26,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:20:26,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:20:26,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:20:26,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:20:24" (1/3) ... [2021-10-11 02:20:26,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1364974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:26, skipping insertion in model container [2021-10-11 02:20:26,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:25" (2/3) ... [2021-10-11 02:20:26,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1364974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:26, skipping insertion in model container [2021-10-11 02:20:26,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:26" (3/3) ... [2021-10-11 02:20:26,408 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-10-11 02:20:26,431 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:20:26,436 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2021-10-11 02:20:26,456 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-11 02:20:26,493 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:20:26,494 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:20:26,494 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:20:26,494 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:20:26,494 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:20:26,495 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:20:26,495 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:20:26,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:20:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-10-11 02:20:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:20:26,519 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:20:26,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:20:26,520 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:20:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:20:26,527 INFO L82 PathProgramCache]: Analyzing trace with hash 157381, now seen corresponding path program 1 times [2021-10-11 02:20:26,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:20:26,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593824550] [2021-10-11 02:20:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:20:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:20:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:26,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593824550] [2021-10-11 02:20:26,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:20:26,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:20:26,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654949405] [2021-10-11 02:20:26,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:20:26,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:20:26,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:20:26,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:20:26,799 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2021-10-11 02:20:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:20:26,930 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-10-11 02:20:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:20:26,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:20:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:20:26,952 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:20:26,954 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:20:26,959 INFO L677 BasicCegarLoop]: 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 [2021-10-11 02:20:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:20:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-11 02:20:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 02:20:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-10-11 02:20:27,019 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 3 [2021-10-11 02:20:27,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:20:27,019 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-10-11 02:20:27,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:20:27,020 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-10-11 02:20:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:20:27,020 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:20:27,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:20:27,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:20:27,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:20:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:20:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 157382, now seen corresponding path program 1 times [2021-10-11 02:20:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:20:27,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455412080] [2021-10-11 02:20:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:20:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:20:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455412080] [2021-10-11 02:20:27,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:20:27,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:20:27,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427601563] [2021-10-11 02:20:27,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:20:27,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:20:27,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:20:27,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:20:27,175 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 4 states. [2021-10-11 02:20:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:20:27,322 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-11 02:20:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:20:27,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2021-10-11 02:20:27,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:20:27,326 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:20:27,326 INFO L226 Difference]: Without dead ends: 40 [2021-10-11 02:20:27,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:20:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-11 02:20:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-11 02:20:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-11 02:20:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-11 02:20:27,340 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 3 [2021-10-11 02:20:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:20:27,342 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-11 02:20:27,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:20:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-11 02:20:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:20:27,343 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:20:27,344 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:20:27,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:20:27,344 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:20:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:20:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash 151338058, now seen corresponding path program 1 times [2021-10-11 02:20:27,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:20:27,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248438164] [2021-10-11 02:20:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:20:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:20:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:27,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248438164] [2021-10-11 02:20:27,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481815136] [2021-10-11 02:20:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:20:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:20:27,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:20:27,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:20:27,673 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-11 02:20:27,676 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:20:27,686 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:20:27,689 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:20:27,690 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-10-11 02:20:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:27,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:20:27,866 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:20:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:27,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448625845] [2021-10-11 02:20:27,964 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:20:27,964 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:20:27,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:20:27,981 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:20:27,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:20:28,794 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:20:29,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:20:29,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:20:29,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2021-10-11 02:20:29,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451984000] [2021-10-11 02:20:29,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:20:29,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:20:29,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:20:29,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:20:29,117 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 10 states. [2021-10-11 02:20:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:20:29,389 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-10-11 02:20:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:20:29,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2021-10-11 02:20:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:20:29,391 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:20:29,391 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:20:29,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:20:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:20:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-10-11 02:20:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 02:20:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-10-11 02:20:29,397 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 5 [2021-10-11 02:20:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:20:29,398 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-10-11 02:20:29,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:20:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-10-11 02:20:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:20:29,399 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:20:29,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:20:29,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:20:29,600 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:20:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:20:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash 396616665, now seen corresponding path program 1 times [2021-10-11 02:20:29,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:20:29,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538793911] [2021-10-11 02:20:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:20:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:20:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:29,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538793911] [2021-10-11 02:20:29,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354113730] [2021-10-11 02:20:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:20:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:20:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:20:29,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:20:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:29,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:20:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:29,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354109547] [2021-10-11 02:20:29,847 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:20:29,847 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:20:29,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:20:29,850 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:20:29,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:20:30,420 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:20:30,764 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-10-11 02:20:30,888 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-10-11 02:20:31,131 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-10-11 02:20:31,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:20:31,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4, 4] total 11 [2021-10-11 02:20:31,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952121330] [2021-10-11 02:20:31,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:20:31,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:20:31,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:20:31,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:20:31,135 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2021-10-11 02:20:31,424 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-10-11 02:20:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:20:31,708 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-10-11 02:20:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:20:31,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-10-11 02:20:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:20:31,718 INFO L225 Difference]: With dead ends: 73 [2021-10-11 02:20:31,719 INFO L226 Difference]: Without dead ends: 73 [2021-10-11 02:20:31,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:20:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-11 02:20:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2021-10-11 02:20:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-11 02:20:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-10-11 02:20:31,727 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-10-11 02:20:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:20:31,727 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-10-11 02:20:31,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:20:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-10-11 02:20:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:20:31,728 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:20:31,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:20:31,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:20:31,947 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:20:31,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:20:31,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2120707428, now seen corresponding path program 1 times [2021-10-11 02:20:31,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:20:31,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424380440] [2021-10-11 02:20:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:20:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:20:32,001 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:20:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:20:32,021 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:20:32,041 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:20:32,041 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:20:32,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-10-11 02:20:32,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:20:32 BoogieIcfgContainer [2021-10-11 02:20:32,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:20:32,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:20:32,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:20:32,070 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:20:32,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:26" (3/4) ... [2021-10-11 02:20:32,074 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:20:32,140 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4975e0b9-9594-4512-b7eb-f2d50ac7931e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:20:32,140 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:20:32,141 INFO L168 Benchmark]: Toolchain (without parser) took 7398.34 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 62.1 MB in the beginning and 72.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:32,141 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 104.9 MB. Free memory is still 79.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:20:32,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.22 ms. Allocated memory is still 104.9 MB. Free memory was 61.9 MB in the beginning and 69.2 MB in the end (delta: -7.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:32,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.84 ms. Allocated memory is still 104.9 MB. Free memory was 68.8 MB in the beginning and 67.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:32,143 INFO L168 Benchmark]: Boogie Preprocessor took 36.91 ms. Allocated memory is still 104.9 MB. Free memory was 67.1 MB in the beginning and 65.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:32,146 INFO L168 Benchmark]: RCFGBuilder took 888.87 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 65.8 MB in the beginning and 98.4 MB in the end (delta: -32.6 MB). Peak memory consumption was 36.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:32,152 INFO L168 Benchmark]: TraceAbstraction took 5669.59 ms. Allocated memory is still 130.0 MB. Free memory was 98.4 MB in the beginning and 73.1 MB in the end (delta: 25.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:32,152 INFO L168 Benchmark]: Witness Printer took 69.98 ms. Allocated memory is still 130.0 MB. Free memory was 73.1 MB in the beginning and 72.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:32,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 104.9 MB. Free memory is still 79.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 658.22 ms. Allocated memory is still 104.9 MB. Free memory was 61.9 MB in the beginning and 69.2 MB in the end (delta: -7.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.84 ms. Allocated memory is still 104.9 MB. Free memory was 68.8 MB in the beginning and 67.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.91 ms. Allocated memory is still 104.9 MB. Free memory was 67.1 MB in the beginning and 65.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 888.87 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 65.8 MB in the beginning and 98.4 MB in the end (delta: -32.6 MB). Peak memory consumption was 36.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5669.59 ms. Allocated memory is still 130.0 MB. Free memory was 98.4 MB in the beginning and 73.1 MB in the end (delta: 25.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. * Witness Printer took 69.98 ms. Allocated memory is still 130.0 MB. Free memory was 73.1 MB in the beginning and 72.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND FALSE !(length < 1) [L518] COND FALSE !(length % 2 == 0) [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() [L521] i++ [L521] COND FALSE !(i < length) [L526] i=0 [L526] COND TRUE i