./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s1liff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s1liff.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 7ee6d6c10c26ee3e0ca2b8182f3d0d1588e83789 ............................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-5485861 [2020-10-25 19:30:27,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:30:27,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:30:27,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:30:27,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:30:27,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:30:27,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:30:27,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:30:27,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:30:27,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:30:27,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:30:27,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:30:27,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:30:27,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:30:27,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:30:27,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:30:27,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:30:27,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:30:27,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:30:27,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:30:27,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:30:27,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:30:27,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:30:27,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:30:27,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:30:27,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:30:27,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:30:27,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:30:27,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:30:27,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:30:27,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:30:27,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:30:27,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:30:27,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:30:27,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:30:27,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:30:27,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:30:27,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:30:27,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:30:27,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:30:27,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:30:27,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:30:27,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:30:27,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:30:27,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:30:27,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:30:27,332 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:30:27,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:30:27,333 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:30:27,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:30:27,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:30:27,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:30:27,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:30:27,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:30:27,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:30:27,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:30:27,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:30:27,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:30:27,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:30:27,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:30:27,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:30:27,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:30:27,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:30:27,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:30:27,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:30:27,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:30:27,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:30:27,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:30:27,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:30:27,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:30:27,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:30:27,340 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ee6d6c10c26ee3e0ca2b8182f3d0d1588e83789 [2020-10-25 19:30:27,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:30:27,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:30:27,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:30:27,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:30:27,830 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:30:27,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s1liff.c [2020-10-25 19:30:27,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/698b225f5/f75ed18c88214485b257de3e6676b411/FLAG5995a6684 [2020-10-25 19:30:28,625 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:30:28,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s1liff.c [2020-10-25 19:30:28,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/698b225f5/f75ed18c88214485b257de3e6676b411/FLAG5995a6684 [2020-10-25 19:30:28,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/698b225f5/f75ed18c88214485b257de3e6676b411 [2020-10-25 19:30:28,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:30:29,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:30:29,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:30:29,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:30:29,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:30:29,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:30:28" (1/1) ... [2020-10-25 19:30:29,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117acc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29, skipping insertion in model container [2020-10-25 19:30:29,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:30:28" (1/1) ... [2020-10-25 19:30:29,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:30:29,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:30:29,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:30:29,315 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:30:29,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:30:29,394 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:30:29,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29 WrapperNode [2020-10-25 19:30:29,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:30:29,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:30:29,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:30:29,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:30:29,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:30:29,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:30:29,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:30:29,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:30:29,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... [2020-10-25 19:30:29,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:30:29,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:30:29,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:30:29,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:30:29,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 19:30:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:30:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:30:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:30:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 19:30:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:30:29,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:30:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:30:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 19:30:30,039 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:30:30,039 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-25 19:30:30,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:30:30 BoogieIcfgContainer [2020-10-25 19:30:30,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:30:30,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:30:30,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:30:30,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:30:30,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:30:28" (1/3) ... [2020-10-25 19:30:30,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295bbd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:30:30, skipping insertion in model container [2020-10-25 19:30:30,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:29" (2/3) ... [2020-10-25 19:30:30,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295bbd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:30:30, skipping insertion in model container [2020-10-25 19:30:30,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:30:30" (3/3) ... [2020-10-25 19:30:30,051 INFO L111 eAbstractionObserver]: Analyzing ICFG s1liff.c [2020-10-25 19:30:30,066 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:30:30,071 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:30:30,087 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:30:30,146 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:30:30,146 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:30:30,151 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:30:30,151 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:30:30,151 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:30:30,151 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:30:30,151 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:30:30,151 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:30:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-25 19:30:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 19:30:30,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:30,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:30:30,184 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2020-10-25 19:30:30,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:30,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806026733] [2020-10-25 19:30:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:30:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:30,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806026733] [2020-10-25 19:30:30,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:30:30,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:30:30,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153861958] [2020-10-25 19:30:30,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:30:30,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:30:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:30:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:30:30,467 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-10-25 19:30:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:30:30,483 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2020-10-25 19:30:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:30:30,484 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-10-25 19:30:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:30:30,493 INFO L225 Difference]: With dead ends: 41 [2020-10-25 19:30:30,493 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 19:30:30,496 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 [2020-10-25 19:30:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 19:30:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-25 19:30:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 19:30:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-25 19:30:30,534 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2020-10-25 19:30:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:30:30,535 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-25 19:30:30,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:30:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-25 19:30:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 19:30:30,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:30,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:30:30,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:30:30,536 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2020-10-25 19:30:30,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:30,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311115413] [2020-10-25 19:30:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:30:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:30,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311115413] [2020-10-25 19:30:30,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:30:30,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:30:30,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592920460] [2020-10-25 19:30:30,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:30:30,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:30:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:30:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:30:30,643 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-10-25 19:30:30,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:30:30,726 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-25 19:30:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:30:30,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-25 19:30:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:30:30,728 INFO L225 Difference]: With dead ends: 36 [2020-10-25 19:30:30,728 INFO L226 Difference]: Without dead ends: 25 [2020-10-25 19:30:30,729 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 [2020-10-25 19:30:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-25 19:30:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-10-25 19:30:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-25 19:30:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-25 19:30:30,735 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2020-10-25 19:30:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:30:30,735 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-25 19:30:30,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:30:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-25 19:30:30,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:30:30,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:30,737 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] [2020-10-25 19:30:30,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 19:30:30,737 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2020-10-25 19:30:30,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:30,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568145792] [2020-10-25 19:30:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:30:30,790 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:30:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:30:30,855 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:30:30,888 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:30:30,888 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:30:30,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 19:30:30,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:30:30 BoogieIcfgContainer [2020-10-25 19:30:30,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:30:30,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:30:30,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:30:30,938 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:30:30,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:30:30" (3/4) ... [2020-10-25 19:30:30,941 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:30:31,011 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:30:31,012 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:30:31,016 INFO L168 Benchmark]: Toolchain (without parser) took 2016.78 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.0 MB in the beginning and 39.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:31,017 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 48.2 MB. Free memory was 29.9 MB in the beginning and 29.8 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:30:31,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.87 ms. Allocated memory is still 48.2 MB. Free memory was 24.3 MB in the beginning and 25.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:31,019 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.37 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 24.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:30:31,019 INFO L168 Benchmark]: Boogie Preprocessor took 69.20 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 22.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:31,020 INFO L168 Benchmark]: RCFGBuilder took 487.21 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.8 MB in the beginning and 29.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:31,021 INFO L168 Benchmark]: TraceAbstraction took 893.10 ms. Allocated memory is still 58.7 MB. Free memory was 29.3 MB in the beginning and 25.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:31,022 INFO L168 Benchmark]: Witness Printer took 74.59 ms. Allocated memory is still 58.7 MB. Free memory was 25.8 MB in the beginning and 39.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:31,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 48.2 MB. Free memory was 29.9 MB in the beginning and 29.8 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.87 ms. Allocated memory is still 48.2 MB. Free memory was 24.3 MB in the beginning and 25.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.37 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 24.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.20 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 22.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 487.21 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.8 MB in the beginning and 29.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 893.10 ms. Allocated memory is still 58.7 MB. Free memory was 29.3 MB in the beginning and 25.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Witness Printer took 74.59 ms. Allocated memory is still 58.7 MB. Free memory was 25.8 MB in the beginning and 39.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 4.4 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