./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s52iff.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_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s52iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0faaa8d120428ed7604b6b4c759776b69e800fbd ........................................................................................................................................................................................................................................................................................................................................................................ 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 [2020-11-28 07:38:54,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:54,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:54,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:54,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:54,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:54,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:54,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:54,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:54,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:54,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:54,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:54,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:54,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:54,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:54,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:54,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:54,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:54,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:54,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:54,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:54,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:54,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:54,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:54,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:54,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:54,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:54,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:54,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:54,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:54,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:54,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:54,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:54,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:54,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:54,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:54,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:54,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:54,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:54,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:54,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:54,290 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:38:54,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:54,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:54,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:54,317 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:54,317 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:54,318 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:54,318 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:38:54,318 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:54,319 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:54,319 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:38:54,319 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:38:54,319 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:54,320 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:38:54,320 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:38:54,320 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:38:54,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:54,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:54,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:38:54,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:54,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:54,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:38:54,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:54,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:38:54,323 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:54,323 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:54,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:38:54,324 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:54,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:38:54,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:54,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:54,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:54,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:54,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:54,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:54,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:38:54,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:38:54,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:38:54,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:38:54,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:54,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:54,328 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_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0faaa8d120428ed7604b6b4c759776b69e800fbd [2020-11-28 07:38:54,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:38:54,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:38:54,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:38:54,643 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:38:54,643 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:38:54,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/../../sv-benchmarks/c/array-fpi/s52iff.c [2020-11-28 07:38:54,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/data/6cd07ab13/38203634bfef4898be3324711ae73172/FLAG2f838169d [2020-11-28 07:38:55,167 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:55,168 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/sv-benchmarks/c/array-fpi/s52iff.c [2020-11-28 07:38:55,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/data/6cd07ab13/38203634bfef4898be3324711ae73172/FLAG2f838169d [2020-11-28 07:38:55,557 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/data/6cd07ab13/38203634bfef4898be3324711ae73172 [2020-11-28 07:38:55,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:55,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:55,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:55,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:55,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:55,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:55,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2240c1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55, skipping insertion in model container [2020-11-28 07:38:55,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:55,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:55,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:55,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:55,895 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:55,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:55,942 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:55,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55 WrapperNode [2020-11-28 07:38:55,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:55,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:55,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:55,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:55,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:55,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:56,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:56,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:56,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:56,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:56,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:56,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:56,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:56,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:56,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:56,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:56,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... [2020-11-28 07:38:56,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:56,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:56,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:56,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:56,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/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 07:38:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:38:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:38:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:38:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:56,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:38:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:38:56,820 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:56,820 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 07:38:56,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:56 BoogieIcfgContainer [2020-11-28 07:38:56,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:56,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:56,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:56,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:56,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:55" (1/3) ... [2020-11-28 07:38:56,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76828d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:56, skipping insertion in model container [2020-11-28 07:38:56,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:55" (2/3) ... [2020-11-28 07:38:56,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76828d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:56, skipping insertion in model container [2020-11-28 07:38:56,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:56" (3/3) ... [2020-11-28 07:38:56,840 INFO L111 eAbstractionObserver]: Analyzing ICFG s52iff.c [2020-11-28 07:38:56,849 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:56,855 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:38:56,864 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:38:56,884 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:56,884 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:38:56,884 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:56,884 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:56,884 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:56,885 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:56,885 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:56,885 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-28 07:38:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:38:56,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:56,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:56,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:56,915 INFO L82 PathProgramCache]: Analyzing trace with hash 164116331, now seen corresponding path program 1 times [2020-11-28 07:38:56,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:56,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630266625] [2020-11-28 07:38:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:57,162 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 07:38:57,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630266625] [2020-11-28 07:38:57,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:57,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:38:57,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581172943] [2020-11-28 07:38:57,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:38:57,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:57,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:38:57,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:38:57,190 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-28 07:38:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:57,250 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2020-11-28 07:38:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:38:57,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-28 07:38:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:57,267 INFO L225 Difference]: With dead ends: 20 [2020-11-28 07:38:57,267 INFO L226 Difference]: Without dead ends: 9 [2020-11-28 07:38:57,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 07:38:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-28 07:38:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-28 07:38:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-28 07:38:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2020-11-28 07:38:57,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2020-11-28 07:38:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:57,299 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-11-28 07:38:57,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:38:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2020-11-28 07:38:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:38:57,299 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:57,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:57,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:38:57,300 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:57,301 INFO L82 PathProgramCache]: Analyzing trace with hash 451105340, now seen corresponding path program 1 times [2020-11-28 07:38:57,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:57,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973357224] [2020-11-28 07:38:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:38:57,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973357224] [2020-11-28 07:38:57,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:57,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:38:57,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434819997] [2020-11-28 07:38:57,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:57,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:57,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:57,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:57,381 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2020-11-28 07:38:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:57,420 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2020-11-28 07:38:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:57,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 07:38:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:57,422 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:38:57,422 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:38:57,423 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 [2020-11-28 07:38:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:38:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:38:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:38:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-11-28 07:38:57,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-11-28 07:38:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:57,426 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-11-28 07:38:57,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-11-28 07:38:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:38:57,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:57,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:57,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:38:57,428 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:57,429 INFO L82 PathProgramCache]: Analyzing trace with hash -331519355, now seen corresponding path program 1 times [2020-11-28 07:38:57,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:57,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359800153] [2020-11-28 07:38:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:57,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:38:57,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741851486] [2020-11-28 07:38:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/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 07:38:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:57,539 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:57,573 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:57,605 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:38:57,606 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:57,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:38:57,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:57 BoogieIcfgContainer [2020-11-28 07:38:57,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:57,849 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:57,849 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:57,849 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:57,850 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:56" (3/4) ... [2020-11-28 07:38:57,851 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:38:57,905 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_85a7eca6-a6ce-4dbc-bfb7-f40b20f8210e/bin/utaipan/witness.graphml [2020-11-28 07:38:57,905 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:57,907 INFO L168 Benchmark]: Toolchain (without parser) took 2344.10 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 53.5 MB in the beginning and 44.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:57,908 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 69.5 MB in the beginning and 69.4 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:57,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.20 ms. Allocated memory is still 94.4 MB. Free memory was 53.2 MB in the beginning and 64.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:57,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.91 ms. Allocated memory is still 94.4 MB. Free memory was 64.7 MB in the beginning and 63.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:57,910 INFO L168 Benchmark]: Boogie Preprocessor took 59.07 ms. Allocated memory is still 94.4 MB. Free memory was 63.2 MB in the beginning and 61.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:57,911 INFO L168 Benchmark]: RCFGBuilder took 749.27 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 61.9 MB in the beginning and 88.6 MB in the end (delta: -26.7 MB). Peak memory consumption was 31.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:57,911 INFO L168 Benchmark]: TraceAbstraction took 1024.24 ms. Allocated memory is still 113.2 MB. Free memory was 88.2 MB in the beginning and 47.2 MB in the end (delta: 41.0 MB). Peak memory consumption was 40.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:57,912 INFO L168 Benchmark]: Witness Printer took 56.03 ms. Allocated memory is still 113.2 MB. Free memory was 47.2 MB in the beginning and 44.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:57,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 69.5 MB in the beginning and 69.4 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.20 ms. Allocated memory is still 94.4 MB. Free memory was 53.2 MB in the beginning and 64.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.91 ms. Allocated memory is still 94.4 MB. Free memory was 64.7 MB in the beginning and 63.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.07 ms. Allocated memory is still 94.4 MB. Free memory was 63.2 MB in the beginning and 61.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 749.27 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 61.9 MB in the beginning and 88.6 MB in the end (delta: -26.7 MB). Peak memory consumption was 31.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1024.24 ms. Allocated memory is still 113.2 MB. Free memory was 88.2 MB in the beginning and 47.2 MB in the end (delta: 41.0 MB). Peak memory consumption was 40.8 MB. Max. memory is 16.1 GB. * Witness Printer took 56.03 ms. Allocated memory is still 113.2 MB. Free memory was 47.2 MB in the beginning and 44.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 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; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=1] [L32] COND TRUE i