./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s5liff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s5liff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c2a6ee3a6cfca973c10d6baed65ceb0a923391b ............................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:06:40,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:06:40,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:06:40,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:06:40,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:06:40,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:06:40,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:06:40,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:06:40,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:06:40,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:06:40,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:06:40,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:06:40,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:06:40,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:06:40,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:06:40,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:06:40,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:06:40,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:06:40,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:06:40,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:06:40,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:06:40,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:06:40,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:06:40,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:06:40,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:06:40,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:06:40,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:06:40,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:06:40,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:06:40,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:06:40,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:06:40,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:06:40,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:06:40,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:06:40,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:06:40,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:06:40,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:06:40,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:06:40,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:06:40,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:06:40,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:06:40,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:06:40,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:06:40,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:06:40,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:06:40,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:06:40,515 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:06:40,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:06:40,515 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:06:40,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:06:40,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:06:40,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:06:40,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:06:40,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:06:40,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:06:40,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:06:40,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:06:40,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:06:40,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:06:40,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:06:40,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:06:40,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:06:40,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:06:40,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:06:40,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:06:40,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:06:40,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:06:40,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:06:40,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:06:40,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:06:40,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:06:40,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c2a6ee3a6cfca973c10d6baed65ceb0a923391b [2020-11-29 22:06:40,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:06:40,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:06:40,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:06:40,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:06:40,830 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:06:40,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s5liff.c [2020-11-29 22:06:40,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/data/28e7cf192/e64fd7e0880045168f0fc37ad431fa45/FLAG67b98aa11 [2020-11-29 22:06:41,449 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:06:41,449 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/sv-benchmarks/c/array-fpi/s5liff.c [2020-11-29 22:06:41,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/data/28e7cf192/e64fd7e0880045168f0fc37ad431fa45/FLAG67b98aa11 [2020-11-29 22:06:41,794 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/data/28e7cf192/e64fd7e0880045168f0fc37ad431fa45 [2020-11-29 22:06:41,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:06:41,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:06:41,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:06:41,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:06:41,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:06:41,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:06:41" (1/1) ... [2020-11-29 22:06:41,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1384dd20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:41, skipping insertion in model container [2020-11-29 22:06:41,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:06:41" (1/1) ... [2020-11-29 22:06:41,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:06:41,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:06:42,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:06:42,011 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:06:42,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:06:42,059 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:06:42,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42 WrapperNode [2020-11-29 22:06:42,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:06:42,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:06:42,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:06:42,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:06:42,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:06:42,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:06:42,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:06:42,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:06:42,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... [2020-11-29 22:06:42,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:06:42,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:06:42,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:06:42,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:06:42,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/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 [2020-11-29 22:06:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:06:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:06:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 22:06:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 22:06:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:06:42,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:06:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 22:06:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 22:06:42,702 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:06:42,702 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 22:06:42,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:06:42 BoogieIcfgContainer [2020-11-29 22:06:42,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:06:42,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:06:42,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:06:42,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:06:42,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:06:41" (1/3) ... [2020-11-29 22:06:42,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22322c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:06:42, skipping insertion in model container [2020-11-29 22:06:42,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:06:42" (2/3) ... [2020-11-29 22:06:42,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22322c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:06:42, skipping insertion in model container [2020-11-29 22:06:42,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:06:42" (3/3) ... [2020-11-29 22:06:42,714 INFO L111 eAbstractionObserver]: Analyzing ICFG s5liff.c [2020-11-29 22:06:42,725 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:06:42,729 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:06:42,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 22:06:42,767 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:06:42,767 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:06:42,767 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:06:42,768 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:06:42,768 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:06:42,768 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:06:42,768 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:06:42,768 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:06:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-29 22:06:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:06:42,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:06:42,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:06:42,790 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:06:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:06:42,797 INFO L82 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2020-11-29 22:06:42,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:06:42,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409266370] [2020-11-29 22:06:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:06:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:06:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:06:43,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409266370] [2020-11-29 22:06:43,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:06:43,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:06:43,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535375862] [2020-11-29 22:06:43,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 22:06:43,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:06:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 22:06:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:06:43,030 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-11-29 22:06:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:06:43,051 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2020-11-29 22:06:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:06:43,052 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-29 22:06:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:06:43,065 INFO L225 Difference]: With dead ends: 41 [2020-11-29 22:06:43,066 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 22:06:43,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:06:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 22:06:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 22:06:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 22:06:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-29 22:06:43,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2020-11-29 22:06:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:06:43,113 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-29 22:06:43,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 22:06:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-29 22:06:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:06:43,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:06:43,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:06:43,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:06:43,116 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:06:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:06:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2020-11-29 22:06:43,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:06:43,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181807612] [2020-11-29 22:06:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:06:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:06:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:06:43,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181807612] [2020-11-29 22:06:43,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:06:43,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:06:43,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661905757] [2020-11-29 22:06:43,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:06:43,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:06:43,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:06:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:06:43,343 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-11-29 22:06:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:06:43,470 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-11-29 22:06:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:06:43,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 22:06:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:06:43,471 INFO L225 Difference]: With dead ends: 36 [2020-11-29 22:06:43,472 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 22:06:43,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:06:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 22:06:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-11-29 22:06:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 22:06:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-29 22:06:43,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2020-11-29 22:06:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:06:43,479 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-29 22:06:43,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:06:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-29 22:06:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:06:43,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:06:43,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:06:43,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:06:43,481 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:06:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:06:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2020-11-29 22:06:43,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:06:43,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39858270] [2020-11-29 22:06:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:06:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:06:43,531 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:06:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:06:43,576 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:06:43,611 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:06:43,611 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 22:06:43,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 22:06:43,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:06:43 BoogieIcfgContainer [2020-11-29 22:06:43,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:06:43,651 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:06:43,651 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:06:43,651 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:06:43,652 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:06:42" (3/4) ... [2020-11-29 22:06:43,656 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 22:06:43,726 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_72b14104-ab57-4371-a011-839ea97e6a06/bin/uautomizer/witness.graphml [2020-11-29 22:06:43,726 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:06:43,729 INFO L168 Benchmark]: Toolchain (without parser) took 1928.93 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 51.1 MB in the beginning and 70.5 MB in the end (delta: -19.4 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:06:43,729 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 52.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:06:43,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.66 ms. Allocated memory is still 86.0 MB. Free memory was 50.8 MB in the beginning and 40.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:06:43,731 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.01 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 40.9 MB in the beginning and 92.9 MB in the end (delta: -52.0 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:06:43,731 INFO L168 Benchmark]: Boogie Preprocessor took 29.96 ms. Allocated memory is still 113.2 MB. Free memory was 92.9 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:06:43,732 INFO L168 Benchmark]: RCFGBuilder took 544.81 ms. Allocated memory is still 113.2 MB. Free memory was 91.5 MB in the beginning and 77.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:06:43,733 INFO L168 Benchmark]: TraceAbstraction took 944.44 ms. Allocated memory is still 113.2 MB. Free memory was 76.9 MB in the beginning and 73.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 16.1 GB. [2020-11-29 22:06:43,733 INFO L168 Benchmark]: Witness Printer took 75.65 ms. Allocated memory is still 113.2 MB. Free memory was 73.3 MB in the beginning and 70.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:06:43,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 52.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.66 ms. Allocated memory is still 86.0 MB. Free memory was 50.8 MB in the beginning and 40.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.01 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 40.9 MB in the beginning and 92.9 MB in the end (delta: -52.0 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.96 ms. Allocated memory is still 113.2 MB. Free memory was 92.9 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 544.81 ms. Allocated memory is still 113.2 MB. Free memory was 91.5 MB in the beginning and 77.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 944.44 ms. Allocated memory is still 113.2 MB. Free memory was 76.9 MB in the beginning and 73.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 16.1 GB. * Witness Printer took 75.65 ms. Allocated memory is still 113.2 MB. Free memory was 73.3 MB in the beginning and 70.5 MB in the end (delta: 2.8 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: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = N [L32] i=0 VAL [N=1] [L32] COND TRUE i