./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/tree-1.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-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/tree-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan --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 daa6bd618e8acf5db639c256f6cad62f101e97d0 ....................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-12-09 14:09:36,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 14:09:36,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 14:09:36,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 14:09:36,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 14:09:36,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 14:09:36,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 14:09:36,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 14:09:36,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 14:09:36,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 14:09:36,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 14:09:36,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 14:09:36,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 14:09:36,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 14:09:36,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 14:09:36,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 14:09:36,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 14:09:36,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 14:09:36,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 14:09:36,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 14:09:36,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 14:09:36,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 14:09:36,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 14:09:36,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 14:09:36,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 14:09:36,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 14:09:36,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 14:09:36,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 14:09:36,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 14:09:36,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 14:09:36,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 14:09:36,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 14:09:36,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 14:09:36,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 14:09:36,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 14:09:36,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 14:09:36,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 14:09:36,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 14:09:36,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 14:09:36,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 14:09:36,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 14:09:36,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 14:09:36,570 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 14:09:36,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 14:09:36,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 14:09:36,571 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 14:09:36,571 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 14:09:36,571 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 14:09:36,572 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 14:09:36,572 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 14:09:36,572 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 14:09:36,572 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 14:09:36,572 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 14:09:36,572 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 14:09:36,572 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 14:09:36,572 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 14:09:36,573 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 14:09:36,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 14:09:36,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 14:09:36,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 14:09:36,573 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 14:09:36,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 14:09:36,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 14:09:36,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 14:09:36,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 14:09:36,574 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 14:09:36,574 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 14:09:36,574 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 14:09:36,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 14:09:36,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 14:09:36,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 14:09:36,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 14:09:36,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 14:09:36,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 14:09:36,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 14:09:36,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 14:09:36,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 14:09:36,576 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 14:09:36,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 14:09:36,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 14:09:36,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 14:09:36,576 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-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> daa6bd618e8acf5db639c256f6cad62f101e97d0 [2020-12-09 14:09:36,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 14:09:36,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 14:09:36,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 14:09:36,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 14:09:36,770 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 14:09:36,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/../../sv-benchmarks/c/heap-manipulation/tree-1.i [2020-12-09 14:09:36,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/data/31b6ac852/a0e68ba5998b48cdb601db1a4a1de74a/FLAGc686af9e8 [2020-12-09 14:09:37,224 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 14:09:37,224 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/sv-benchmarks/c/heap-manipulation/tree-1.i [2020-12-09 14:09:37,236 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/data/31b6ac852/a0e68ba5998b48cdb601db1a4a1de74a/FLAGc686af9e8 [2020-12-09 14:09:37,247 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/data/31b6ac852/a0e68ba5998b48cdb601db1a4a1de74a [2020-12-09 14:09:37,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 14:09:37,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 14:09:37,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 14:09:37,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 14:09:37,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 14:09:37,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293b5905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37, skipping insertion in model container [2020-12-09 14:09:37,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 14:09:37,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 14:09:37,483 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/sv-benchmarks/c/heap-manipulation/tree-1.i[22626,22639] [2020-12-09 14:09:37,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:09:37,505 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 14:09:37,527 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/sv-benchmarks/c/heap-manipulation/tree-1.i[22626,22639] [2020-12-09 14:09:37,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:09:37,569 INFO L208 MainTranslator]: Completed translation [2020-12-09 14:09:37,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37 WrapperNode [2020-12-09 14:09:37,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 14:09:37,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 14:09:37,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 14:09:37,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 14:09:37,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 14:09:37,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 14:09:37,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 14:09:37,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 14:09:37,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... [2020-12-09 14:09:37,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 14:09:37,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 14:09:37,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 14:09:37,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 14:09:37,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/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 [2020-12-09 14:09:37,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 14:09:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 14:09:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 14:09:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 14:09:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 14:09:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 14:09:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 14:09:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 14:09:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 14:09:37,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 14:09:38,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 14:09:38,207 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2020-12-09 14:09:38,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:38 BoogieIcfgContainer [2020-12-09 14:09:38,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 14:09:38,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 14:09:38,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 14:09:38,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 14:09:38,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:09:37" (1/3) ... [2020-12-09 14:09:38,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cad2217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:09:38, skipping insertion in model container [2020-12-09 14:09:38,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:37" (2/3) ... [2020-12-09 14:09:38,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cad2217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:09:38, skipping insertion in model container [2020-12-09 14:09:38,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:38" (3/3) ... [2020-12-09 14:09:38,214 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-1.i [2020-12-09 14:09:38,223 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 14:09:38,226 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 67 error locations. [2020-12-09 14:09:38,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2020-12-09 14:09:38,247 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 14:09:38,247 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 14:09:38,247 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 14:09:38,247 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 14:09:38,247 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 14:09:38,247 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 14:09:38,247 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 14:09:38,247 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 14:09:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-12-09 14:09:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 14:09:38,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:38,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 14:09:38,264 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr47REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr35REQUIRES_VIOLATION, ULTIMATE.startErr56REQUIRES_VIOLATION, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr54REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr62REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr48REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr57REQUIRES_VIOLATION, ULTIMATE.startErr36REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr55REQUIRES_VIOLATION, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr61REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION]=== [2020-12-09 14:09:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash 318605, now seen corresponding path program 1 times [2020-12-09 14:09:38,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:38,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281445620] [2020-12-09 14:09:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281445620] [2020-12-09 14:09:38,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:38,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 14:09:38,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016270689] [2020-12-09 14:09:38,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 14:09:38,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:09:38,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 14:09:38,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 14:09:38,381 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 2 states. [2020-12-09 14:09:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:38,394 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2020-12-09 14:09:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 14:09:38,395 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 3 [2020-12-09 14:09:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:38,402 INFO L225 Difference]: With dead ends: 129 [2020-12-09 14:09:38,402 INFO L226 Difference]: Without dead ends: 128 [2020-12-09 14:09:38,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 14:09:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-09 14:09:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-12-09 14:09:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-09 14:09:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2020-12-09 14:09:38,433 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 3 [2020-12-09 14:09:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:38,433 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2020-12-09 14:09:38,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 14:09:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2020-12-09 14:09:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 14:09:38,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:38,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 14:09:38,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 14:09:38,435 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr47REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr35REQUIRES_VIOLATION, ULTIMATE.startErr56REQUIRES_VIOLATION, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr54REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr62REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr48REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr57REQUIRES_VIOLATION, ULTIMATE.startErr36REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr55REQUIRES_VIOLATION, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr61REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION]=== [2020-12-09 14:09:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:38,436 INFO L82 PathProgramCache]: Analyzing trace with hash 9847418, now seen corresponding path program 1 times [2020-12-09 14:09:38,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:38,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806318597] [2020-12-09 14:09:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:38,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806318597] [2020-12-09 14:09:38,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:38,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 14:09:38,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728716956] [2020-12-09 14:09:38,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 14:09:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:09:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 14:09:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 14:09:38,478 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 3 states. [2020-12-09 14:09:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:38,612 INFO L93 Difference]: Finished difference Result 204 states and 221 transitions. [2020-12-09 14:09:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 14:09:38,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 14:09:38,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:38,614 INFO L225 Difference]: With dead ends: 204 [2020-12-09 14:09:38,614 INFO L226 Difference]: Without dead ends: 204 [2020-12-09 14:09:38,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 14:09:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-09 14:09:38,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 125. [2020-12-09 14:09:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-09 14:09:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2020-12-09 14:09:38,624 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 4 [2020-12-09 14:09:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:38,624 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2020-12-09 14:09:38,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 14:09:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2020-12-09 14:09:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 14:09:38,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:38,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 14:09:38,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 14:09:38,625 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr47REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr35REQUIRES_VIOLATION, ULTIMATE.startErr56REQUIRES_VIOLATION, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr54REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr62REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr48REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr57REQUIRES_VIOLATION, ULTIMATE.startErr36REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr55REQUIRES_VIOLATION, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr61REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION]=== [2020-12-09 14:09:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash 9847419, now seen corresponding path program 1 times [2020-12-09 14:09:38,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:38,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967379202] [2020-12-09 14:09:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:38,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967379202] [2020-12-09 14:09:38,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:38,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 14:09:38,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908197023] [2020-12-09 14:09:38,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 14:09:38,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:09:38,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 14:09:38,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 14:09:38,661 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 3 states. [2020-12-09 14:09:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:38,770 INFO L93 Difference]: Finished difference Result 218 states and 237 transitions. [2020-12-09 14:09:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 14:09:38,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 14:09:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:38,773 INFO L225 Difference]: With dead ends: 218 [2020-12-09 14:09:38,773 INFO L226 Difference]: Without dead ends: 218 [2020-12-09 14:09:38,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 14:09:38,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-09 14:09:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 133. [2020-12-09 14:09:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-09 14:09:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2020-12-09 14:09:38,784 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 4 [2020-12-09 14:09:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:38,785 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2020-12-09 14:09:38,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 14:09:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2020-12-09 14:09:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 14:09:38,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:38,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 14:09:38,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 14:09:38,786 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr47REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr43REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr49REQUIRES_VIOLATION, ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr35REQUIRES_VIOLATION, ULTIMATE.startErr56REQUIRES_VIOLATION, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr33REQUIRES_VIOLATION, ULTIMATE.startErr54REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr41REQUIRES_VIOLATION, ULTIMATE.startErr62REQUIRES_VIOLATION, ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION, ULTIMATE.startErr39REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr46REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr42REQUIRES_VIOLATION, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr48REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr34REQUIRES_VIOLATION, ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr57REQUIRES_VIOLATION, ULTIMATE.startErr36REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr32REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr55REQUIRES_VIOLATION, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr61REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr38REQUIRES_VIOLATION]=== [2020-12-09 14:09:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash 9838116, now seen corresponding path program 1 times [2020-12-09 14:09:38,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:38,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911699298] [2020-12-09 14:09:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 14:09:38,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 14:09:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 14:09:38,812 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 14:09:38,827 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 14:09:38,828 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 14:09:38,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 14:09:38,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 02:09:38 BoogieIcfgContainer [2020-12-09 14:09:38,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 14:09:38,840 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 14:09:38,840 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 14:09:38,840 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 14:09:38,841 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:38" (3/4) ... [2020-12-09 14:09:38,842 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 14:09:38,865 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_65f756c1-751f-411c-af71-5d22cee776bc/bin/utaipan/witness.graphml [2020-12-09 14:09:38,865 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 14:09:38,866 INFO L168 Benchmark]: Toolchain (without parser) took 1615.00 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 71.3 MB in the beginning and 92.2 MB in the end (delta: -20.9 MB). Peak memory consumption was 994.7 kB. Max. memory is 16.1 GB. [2020-12-09 14:09:38,867 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 109.1 MB. Free memory is still 88.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:38,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.43 ms. Allocated memory is still 109.1 MB. Free memory was 71.1 MB in the beginning and 72.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:38,868 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.88 ms. Allocated memory is still 109.1 MB. Free memory was 72.5 MB in the beginning and 70.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:38,869 INFO L168 Benchmark]: Boogie Preprocessor took 32.91 ms. Allocated memory is still 109.1 MB. Free memory was 70.4 MB in the beginning and 68.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:38,869 INFO L168 Benchmark]: RCFGBuilder took 558.84 ms. Allocated memory is still 109.1 MB. Free memory was 68.4 MB in the beginning and 51.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:38,870 INFO L168 Benchmark]: TraceAbstraction took 630.35 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 51.8 MB in the beginning and 93.2 MB in the end (delta: -41.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:38,870 INFO L168 Benchmark]: Witness Printer took 24.76 ms. Allocated memory is still 132.1 MB. Free memory was 93.2 MB in the beginning and 92.2 MB in the end (delta: 982.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:38,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 109.1 MB. Free memory is still 88.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 318.43 ms. Allocated memory is still 109.1 MB. Free memory was 71.1 MB in the beginning and 72.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.88 ms. Allocated memory is still 109.1 MB. Free memory was 72.5 MB in the beginning and 70.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.91 ms. Allocated memory is still 109.1 MB. Free memory was 70.4 MB in the beginning and 68.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 558.84 ms. Allocated memory is still 109.1 MB. Free memory was 68.4 MB in the beginning and 51.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 630.35 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 51.8 MB in the beginning and 93.2 MB in the end (delta: -41.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 24.76 ms. Allocated memory is still 132.1 MB. Free memory was 93.2 MB in the beginning and 92.2 MB in the end (delta: 982.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 601]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L585] struct node *nodelast = ((void *)0); [L586] struct node *node = ((void *)0); [L587] COND FALSE !(__VERIFIER_nondet_int()) [L601] node->parent = ((void *)0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 129 locations, 67 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 394 SDtfs, 232 SDslu, 119 SDs, 0 SdLazy, 202 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 164 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 58 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...