./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.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_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/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 aa3ae4378a5284e50be7191d52900376e96b0fdc ............................................................................................................................................................................................................................................................................................................................................................................................... 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 07:40:26,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:40:26,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:40:26,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:40:26,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:40:26,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:40:26,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:40:26,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:40:26,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:40:26,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:40:26,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:40:26,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:40:26,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:40:26,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:40:26,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:40:26,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:40:26,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:40:26,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:40:26,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:40:26,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:40:26,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:40:26,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:40:26,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:40:26,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:40:26,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:40:26,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:40:26,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:40:26,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:40:26,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:40:26,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:40:26,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:40:26,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:40:26,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:40:26,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:40:26,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:40:26,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:40:26,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:40:26,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:40:26,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:40:26,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:40:26,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:40:26,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:40:26,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:40:26,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:40:26,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:40:26,479 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:40:26,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:40:26,480 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:40:26,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:40:26,480 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:40:26,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:40:26,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:40:26,481 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:40:26,481 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:40:26,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:40:26,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:40:26,482 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:40:26,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:40:26,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:40:26,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:40:26,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:40:26,484 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:40:26,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:40:26,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:40:26,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:40:26,484 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:40:26,485 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:40:26,485 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:40:26,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:40:26,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:40:26,486 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:40:26,486 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:40:26,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:40:26,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:40:26,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:40:26,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:40:26,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:40:26,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:40:26,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:40:26,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:40:26,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:40:26,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:40:26,488 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_10321399-7e00-42ad-8acb-30fdad78f06d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa3ae4378a5284e50be7191d52900376e96b0fdc [2020-11-28 07:40:26,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:40:26,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:40:26,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:40:26,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:40:26,809 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:40:26,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2020-11-28 07:40:26,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/data/e8c3fa9ff/16c26816057a4b51b978d1b21ef50506/FLAG3928ad486 [2020-11-28 07:40:27,420 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:40:27,420 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2020-11-28 07:40:27,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/data/e8c3fa9ff/16c26816057a4b51b978d1b21ef50506/FLAG3928ad486 [2020-11-28 07:40:27,786 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/data/e8c3fa9ff/16c26816057a4b51b978d1b21ef50506 [2020-11-28 07:40:27,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:40:27,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:40:27,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:27,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:40:27,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:40:27,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:27" (1/1) ... [2020-11-28 07:40:27,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d211c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:27, skipping insertion in model container [2020-11-28 07:40:27,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:27" (1/1) ... [2020-11-28 07:40:27,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:40:27,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:40:27,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:28,005 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:40:28,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:28,056 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:40:28,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28 WrapperNode [2020-11-28 07:40:28,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:28,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:28,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:40:28,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:40:28,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:28,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:40:28,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:40:28,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:40:28,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:40:28,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:40:28,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:40:28,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:40:28,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/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 07:40:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:40:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:40:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:40:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:40:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:40:28,457 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:40:28,457 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-28 07:40:28,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:28 BoogieIcfgContainer [2020-11-28 07:40:28,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:40:28,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:40:28,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:40:28,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:40:28,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:40:27" (1/3) ... [2020-11-28 07:40:28,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128188ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:28, skipping insertion in model container [2020-11-28 07:40:28,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (2/3) ... [2020-11-28 07:40:28,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128188ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:28, skipping insertion in model container [2020-11-28 07:40:28,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:28" (3/3) ... [2020-11-28 07:40:28,468 INFO L111 eAbstractionObserver]: Analyzing ICFG derefInLoop1.c [2020-11-28 07:40:28,479 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:40:28,484 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 07:40:28,494 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 07:40:28,514 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:40:28,514 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:40:28,514 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:40:28,514 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:40:28,515 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:40:28,515 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:40:28,515 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:40:28,515 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:40:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-11-28 07:40:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:40:28,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:28,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:40:28,535 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:40:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:28,539 INFO L82 PathProgramCache]: Analyzing trace with hash 58678, now seen corresponding path program 1 times [2020-11-28 07:40:28,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:28,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676829033] [2020-11-28 07:40:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:28,685 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 07:40:28,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676829033] [2020-11-28 07:40:28,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:28,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:40:28,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382012397] [2020-11-28 07:40:28,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:28,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:28,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:28,708 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-11-28 07:40:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:28,813 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-11-28 07:40:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:28,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:40:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:28,823 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:40:28,823 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 07:40:28,825 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 07:40:28,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 07:40:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2020-11-28 07:40:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 07:40:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-28 07:40:28,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2020-11-28 07:40:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:28,854 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 07:40:28,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-28 07:40:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:40:28,854 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:28,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:40:28,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:40:28,855 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:40:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1797552, now seen corresponding path program 1 times [2020-11-28 07:40:28,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:28,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367153187] [2020-11-28 07:40:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:28,913 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 07:40:28,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367153187] [2020-11-28 07:40:28,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:28,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:40:28,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021324979] [2020-11-28 07:40:28,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:28,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:28,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:28,917 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-11-28 07:40:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:28,973 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-28 07:40:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:28,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:40:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:28,975 INFO L225 Difference]: With dead ends: 12 [2020-11-28 07:40:28,975 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:40:28,976 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 07:40:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:40:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-11-28 07:40:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:40:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 07:40:28,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2020-11-28 07:40:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:28,979 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 07:40:28,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-28 07:40:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:40:28,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:28,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:40:28,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:40:28,980 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:40:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:28,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1727391791, now seen corresponding path program 1 times [2020-11-28 07:40:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:28,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698498123] [2020-11-28 07:40:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:29,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698498123] [2020-11-28 07:40:29,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382004824] [2020-11-28 07:40:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:29,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:40:29,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:29,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:29,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747508293] [2020-11-28 07:40:29,210 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:40:29,211 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:40:29,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:40:29,222 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:40:29,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:40:29,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:40:29,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:40:29,822 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:40:30,037 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-11-28 07:40:30,374 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-11-28 07:40:30,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:40:30,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 6 [2020-11-28 07:40:30,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588399047] [2020-11-28 07:40:30,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:40:30,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:40:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:40:30,466 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-11-28 07:40:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:30,571 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-11-28 07:40:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:40:30,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-28 07:40:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:30,573 INFO L225 Difference]: With dead ends: 18 [2020-11-28 07:40:30,573 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:40:30,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:40:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:40:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2020-11-28 07:40:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 07:40:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-28 07:40:30,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-11-28 07:40:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:30,577 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-28 07:40:30,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:40:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-28 07:40:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:40:30,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:30,577 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-28 07:40:30,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:40:30,786 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-28 07:40:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:30,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2009516503, now seen corresponding path program 1 times [2020-11-28 07:40:30,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:30,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187950082] [2020-11-28 07:40:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:40:30,803 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:40:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:40:30,814 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:40:30,826 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:40:30,827 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:40:30,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-28 07:40:30,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:40:30 BoogieIcfgContainer [2020-11-28 07:40:30,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:40:30,845 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:40:30,846 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:40:30,846 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:40:30,846 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:28" (3/4) ... [2020-11-28 07:40:30,848 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:40:30,891 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_10321399-7e00-42ad-8acb-30fdad78f06d/bin/utaipan/witness.graphml [2020-11-28 07:40:30,895 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:40:30,897 INFO L168 Benchmark]: Toolchain (without parser) took 3106.68 ms. Allocated memory was 121.6 MB in the beginning and 153.1 MB in the end (delta: 31.5 MB). Free memory was 89.9 MB in the beginning and 84.8 MB in the end (delta: 5.1 MB). Peak memory consumption was 37.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:30,898 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory was 36.6 MB in the beginning and 36.6 MB in the end (delta: 43.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:40:30,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.84 ms. Allocated memory is still 121.6 MB. Free memory was 89.4 MB in the beginning and 98.2 MB in the end (delta: -8.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:30,900 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.32 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 97.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:40:30,902 INFO L168 Benchmark]: Boogie Preprocessor took 19.22 ms. Allocated memory is still 121.6 MB. Free memory was 97.2 MB in the beginning and 96.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:30,902 INFO L168 Benchmark]: RCFGBuilder took 347.78 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 84.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:30,904 INFO L168 Benchmark]: TraceAbstraction took 2384.11 ms. Allocated memory was 121.6 MB in the beginning and 153.1 MB in the end (delta: 31.5 MB). Free memory was 83.5 MB in the beginning and 86.9 MB in the end (delta: -3.4 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:30,908 INFO L168 Benchmark]: Witness Printer took 49.97 ms. Allocated memory is still 153.1 MB. Free memory was 86.9 MB in the beginning and 84.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:30,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory was 36.6 MB in the beginning and 36.6 MB in the end (delta: 43.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 263.84 ms. Allocated memory is still 121.6 MB. Free memory was 89.4 MB in the beginning and 98.2 MB in the end (delta: -8.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.32 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 97.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.22 ms. Allocated memory is still 121.6 MB. Free memory was 97.2 MB in the beginning and 96.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 347.78 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 84.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2384.11 ms. Allocated memory was 121.6 MB in the beginning and 153.1 MB in the end (delta: 31.5 MB). Free memory was 83.5 MB in the beginning and 86.9 MB in the end (delta: -3.4 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.1 GB. * Witness Printer took 49.97 ms. Allocated memory is still 153.1 MB. Free memory was 86.9 MB in the beginning and 84.8 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: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; [L3] COND TRUE i < 2 [L4] int a[10]; [L5] COND TRUE i == 0 [L6] p = a [L3] i++ [L3] COND TRUE i < 2 [L4] int a[10]; [L5] COND FALSE !(i == 0) [L8] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 11 SDslu, 9 SDs, 0 SdLazy, 46 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 224 SizeOfPredicates, 1 NumberOfNonLiveVariables, 33 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 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: OVERALL_TIME[ms]: 611, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 5, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 378, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME[ms]: 372, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 153, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 17, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 159, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 10, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME[ms]: 16, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 114, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 113, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 13, DAG_COMPRESSION_PROCESSED_NODES: 54, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...