./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/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 639853f2f40cff84155fe09902eff2b5a20185f5 ............................................................................................................................................................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-28 07:41:22,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:22,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:22,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:22,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:22,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:22,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:22,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:22,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:22,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:22,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:22,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:22,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:22,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:22,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:22,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:22,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:22,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:22,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:22,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:22,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:22,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:22,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:22,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:22,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:22,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:22,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:22,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:22,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:22,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:22,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:22,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:22,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:22,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:22,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:22,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:22,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:22,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:22,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:22,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:22,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:22,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:41:22,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:22,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:22,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:22,589 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:22,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:22,589 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:22,590 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:22,590 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:22,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:22,591 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:22,591 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:22,592 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:22,592 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:22,593 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:22,593 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:22,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:41:22,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:41:22,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:22,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:22,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:41:22,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:22,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:22,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:22,597 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:41:22,597 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:41:22,598 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:41:22,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:22,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:22,598 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:22,599 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:22,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:22,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:22,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:22,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:22,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:22,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:22,600 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:22,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:22,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:22,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:22,601 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_b916821e-3c04-4d3c-9d51-3f9b9af31060/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 639853f2f40cff84155fe09902eff2b5a20185f5 [2020-11-28 07:41:22,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:22,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:22,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:22,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:22,898 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:22,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c [2020-11-28 07:41:22,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/data/eb23b6a3b/8d4b46b9e9884611adec52948aa329f7/FLAG0e337e72b [2020-11-28 07:41:23,512 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:23,514 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c [2020-11-28 07:41:23,525 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/data/eb23b6a3b/8d4b46b9e9884611adec52948aa329f7/FLAG0e337e72b [2020-11-28 07:41:23,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/data/eb23b6a3b/8d4b46b9e9884611adec52948aa329f7 [2020-11-28 07:41:23,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:23,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:23,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:23,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:23,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:23,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:23" (1/1) ... [2020-11-28 07:41:23,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffa81e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:23, skipping insertion in model container [2020-11-28 07:41:23,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:23" (1/1) ... [2020-11-28 07:41:23,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:23,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:24,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:24,118 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:24,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:24,175 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:24,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24 WrapperNode [2020-11-28 07:41:24,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:24,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:24,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:24,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:24,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:24,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:24,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:24,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:24,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:24,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:24,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:24,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:24,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/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 [2020-11-28 07:41:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:41:24,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:24,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:41:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:24,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:41:25,033 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:25,033 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:41:25,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:25 BoogieIcfgContainer [2020-11-28 07:41:25,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:25,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:25,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:25,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:25,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:23" (1/3) ... [2020-11-28 07:41:25,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3116472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:25, skipping insertion in model container [2020-11-28 07:41:25,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (2/3) ... [2020-11-28 07:41:25,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3116472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:25, skipping insertion in model container [2020-11-28 07:41:25,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:25" (3/3) ... [2020-11-28 07:41:25,046 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_-read.c [2020-11-28 07:41:25,058 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:25,062 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-28 07:41:25,080 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-28 07:41:25,110 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:25,110 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:41:25,110 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:25,110 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:25,111 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:25,111 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:25,111 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:25,111 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-28 07:41:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:41:25,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:25,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:41:25,137 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:41:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:25,145 INFO L82 PathProgramCache]: Analyzing trace with hash 3894484, now seen corresponding path program 1 times [2020-11-28 07:41:25,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:25,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7136659] [2020-11-28 07:41:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:25,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7136659] [2020-11-28 07:41:25,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:25,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:25,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274274896] [2020-11-28 07:41:25,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:25,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:25,325 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-28 07:41:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:25,384 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-28 07:41:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:25,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:41:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:25,397 INFO L225 Difference]: With dead ends: 39 [2020-11-28 07:41:25,397 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 07:41:25,400 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 [2020-11-28 07:41:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 07:41:25,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-11-28 07:41:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:41:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-28 07:41:25,445 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2020-11-28 07:41:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:25,446 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-28 07:41:25,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-28 07:41:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:41:25,446 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:25,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:41:25,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:25,447 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:41:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:25,450 INFO L82 PathProgramCache]: Analyzing trace with hash 3793645, now seen corresponding path program 1 times [2020-11-28 07:41:25,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:25,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147517500] [2020-11-28 07:41:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:25,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147517500] [2020-11-28 07:41:25,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:25,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:25,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962715413] [2020-11-28 07:41:25,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:25,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:25,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:25,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:25,545 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-11-28 07:41:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:25,655 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-11-28 07:41:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:41:25,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-28 07:41:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:25,656 INFO L225 Difference]: With dead ends: 40 [2020-11-28 07:41:25,657 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 07:41:25,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 07:41:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2020-11-28 07:41:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 07:41:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-28 07:41:25,662 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 4 [2020-11-28 07:41:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:25,662 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-28 07:41:25,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-11-28 07:41:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:41:25,663 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:25,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:41:25,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:41:25,663 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:41:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash 117695404, now seen corresponding path program 1 times [2020-11-28 07:41:25,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:25,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187735994] [2020-11-28 07:41:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187735994] [2020-11-28 07:41:25,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:25,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:25,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873170959] [2020-11-28 07:41:25,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:41:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:41:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:25,792 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-11-28 07:41:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:25,923 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-11-28 07:41:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:41:25,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-28 07:41:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:25,925 INFO L225 Difference]: With dead ends: 44 [2020-11-28 07:41:25,925 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 07:41:25,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 07:41:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2020-11-28 07:41:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 07:41:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-28 07:41:25,931 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 5 [2020-11-28 07:41:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:25,931 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-28 07:41:25,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:41:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-28 07:41:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:41:25,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:25,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:41:25,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:41:25,936 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:41:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:25,936 INFO L82 PathProgramCache]: Analyzing trace with hash 117692998, now seen corresponding path program 1 times [2020-11-28 07:41:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:25,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116474273] [2020-11-28 07:41:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:25,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116474273] [2020-11-28 07:41:25,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:25,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:25,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374414248] [2020-11-28 07:41:25,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:25,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:25,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:25,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:25,998 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-11-28 07:41:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:26,045 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-11-28 07:41:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:26,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-28 07:41:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:26,046 INFO L225 Difference]: With dead ends: 24 [2020-11-28 07:41:26,046 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:41:26,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:41:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 07:41:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:41:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-28 07:41:26,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2020-11-28 07:41:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:26,051 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-28 07:41:26,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-28 07:41:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:41:26,051 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:26,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:41:26,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:41:26,052 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:41:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash 117692999, now seen corresponding path program 1 times [2020-11-28 07:41:26,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:26,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136383115] [2020-11-28 07:41:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:26,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:26,085 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:26,103 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:41:26,104 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:41:26,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:41:26,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:26 BoogieIcfgContainer [2020-11-28 07:41:26,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:26,124 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:26,124 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:26,125 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:26,125 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:25" (3/4) ... [2020-11-28 07:41:26,127 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:41:26,161 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b916821e-3c04-4d3c-9d51-3f9b9af31060/bin/utaipan/witness.graphml [2020-11-28 07:41:26,161 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:26,163 INFO L168 Benchmark]: Toolchain (without parser) took 2281.48 ms. Allocated memory is still 115.3 MB. Free memory was 85.4 MB in the beginning and 61.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,163 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 75.5 MB. Free memory was 41.7 MB in the beginning and 41.6 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:26,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.78 ms. Allocated memory is still 115.3 MB. Free memory was 85.4 MB in the beginning and 93.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,165 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.89 ms. Allocated memory is still 115.3 MB. Free memory was 93.3 MB in the beginning and 91.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,165 INFO L168 Benchmark]: Boogie Preprocessor took 53.58 ms. Allocated memory is still 115.3 MB. Free memory was 91.7 MB in the beginning and 90.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:26,166 INFO L168 Benchmark]: RCFGBuilder took 753.04 ms. Allocated memory is still 115.3 MB. Free memory was 90.6 MB in the beginning and 62.4 MB in the end (delta: 28.2 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,167 INFO L168 Benchmark]: TraceAbstraction took 1086.79 ms. Allocated memory is still 115.3 MB. Free memory was 61.8 MB in the beginning and 63.2 MB in the end (delta: -1.4 MB). Peak memory consumption was 300.9 kB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,167 INFO L168 Benchmark]: Witness Printer took 36.85 ms. Allocated memory is still 115.3 MB. Free memory was 63.2 MB in the beginning and 61.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:26,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 75.5 MB. Free memory was 41.7 MB in the beginning and 41.6 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 295.78 ms. Allocated memory is still 115.3 MB. Free memory was 85.4 MB in the beginning and 93.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.89 ms. Allocated memory is still 115.3 MB. Free memory was 93.3 MB in the beginning and 91.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.58 ms. Allocated memory is still 115.3 MB. Free memory was 91.7 MB in the beginning and 90.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 753.04 ms. Allocated memory is still 115.3 MB. Free memory was 90.6 MB in the beginning and 62.4 MB in the end (delta: 28.2 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1086.79 ms. Allocated memory is still 115.3 MB. Free memory was 61.8 MB in the beginning and 63.2 MB in the end (delta: -1.4 MB). Peak memory consumption was 300.9 kB. Max. memory is 16.1 GB. * Witness Printer took 36.85 ms. Allocated memory is still 115.3 MB. Free memory was 63.2 MB in the beginning and 61.1 MB in the end (delta: 2.1 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: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L32] int i, b[100]; [L33] i = 0 [L33] COND TRUE i < 100 [L21] int a[n], i; [L22] i = 0 [L22] COND FALSE !(i < size) [L12] int res = 0, i; [L13] i = 0 [L13] COND TRUE i < size [L14] b[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 123 SDslu, 98 SDs, 0 SdLazy, 104 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 4 MinimizatonAttempts, 47 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 168 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...