./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res2f.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/res2f.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 d4908701bc858db819ac584f6da9ed504c4033b1 ........................................................................................................................................................................................................................................................................................................................................................................................ 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 19:29:55,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:29:55,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:29:55,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:29:55,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:29:55,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:29:55,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:29:55,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:29:55,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:29:55,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:29:55,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:29:55,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:29:55,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:29:55,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:29:55,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:29:55,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:29:55,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:29:55,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:29:55,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:29:55,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:29:55,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:29:55,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:29:55,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:29:55,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:29:55,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:29:55,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:29:55,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:29:55,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:29:55,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:29:55,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:29:55,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:29:55,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:29:55,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:29:55,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:29:55,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:29:55,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:29:55,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:29:55,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:29:55,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:29:55,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:29:55,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:29:55,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:29:56,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:29:56,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:29:56,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:29:56,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:29:56,011 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:29:56,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:29:56,011 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:29:56,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:29:56,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:29:56,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:29:56,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:29:56,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:29:56,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:29:56,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:29:56,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:29:56,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:29:56,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:29:56,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:29:56,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:29:56,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:29:56,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:29:56,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:29:56,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:29:56,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:29:56,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:29:56,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:29:56,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:29:56,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:29:56,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:29:56,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4908701bc858db819ac584f6da9ed504c4033b1 [2020-10-25 19:29:56,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:29:56,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:29:56,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:29:56,453 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:29:56,454 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:29:56,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2f.c [2020-10-25 19:29:56,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26e60f1b2/734b41f8bbda446bbcd7b90e8379b95b/FLAG46e0f4e56 [2020-10-25 19:29:57,204 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:29:57,205 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2f.c [2020-10-25 19:29:57,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26e60f1b2/734b41f8bbda446bbcd7b90e8379b95b/FLAG46e0f4e56 [2020-10-25 19:29:57,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26e60f1b2/734b41f8bbda446bbcd7b90e8379b95b [2020-10-25 19:29:57,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:29:57,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:29:57,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:29:57,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:29:57,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:29:57,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a82ac31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57, skipping insertion in model container [2020-10-25 19:29:57,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:29:57,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:29:57,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:29:57,600 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:29:57,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:29:57,690 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:29:57,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57 WrapperNode [2020-10-25 19:29:57,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:29:57,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:29:57,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:29:57,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:29:57,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:29:57,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:29:57,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:29:57,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:29:57,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (1/1) ... [2020-10-25 19:29:57,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:29:57,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:29:57,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:29:57,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:29:57,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (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 19:29:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:29:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:29:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:29:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 19:29:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:29:57,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:29:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:29:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 19:29:58,243 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:29:58,244 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-25 19:29:58,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:29:58 BoogieIcfgContainer [2020-10-25 19:29:58,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:29:58,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:29:58,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:29:58,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:29:58,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:29:57" (1/3) ... [2020-10-25 19:29:58,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cf6021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:29:58, skipping insertion in model container [2020-10-25 19:29:58,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:29:57" (2/3) ... [2020-10-25 19:29:58,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cf6021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:29:58, skipping insertion in model container [2020-10-25 19:29:58,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:29:58" (3/3) ... [2020-10-25 19:29:58,256 INFO L111 eAbstractionObserver]: Analyzing ICFG res2f.c [2020-10-25 19:29:58,270 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:29:58,276 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:29:58,293 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:29:58,350 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:29:58,351 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:29:58,352 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:29:58,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:29:58,352 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:29:58,352 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:29:58,352 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:29:58,353 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:29:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-25 19:29:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:29:58,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:29:58,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:29:58,383 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:29:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:29:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2020-10-25 19:29:58,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:29:58,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123378460] [2020-10-25 19:29:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:29:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:29:58,634 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 19:29:58,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123378460] [2020-10-25 19:29:58,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:29:58,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:29:58,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144588948] [2020-10-25 19:29:58,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:29:58,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:29:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:29:58,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:29:58,665 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-25 19:29:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:29:58,693 INFO L93 Difference]: Finished difference Result 57 states and 83 transitions. [2020-10-25 19:29:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:29:58,695 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-10-25 19:29:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:29:58,702 INFO L225 Difference]: With dead ends: 57 [2020-10-25 19:29:58,703 INFO L226 Difference]: Without dead ends: 26 [2020-10-25 19:29:58,705 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 19:29:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-25 19:29:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-25 19:29:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 19:29:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-25 19:29:58,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2020-10-25 19:29:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:29:58,773 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-25 19:29:58,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:29:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-25 19:29:58,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:29:58,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:29:58,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:29:58,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:29:58,776 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:29:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:29:58,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2020-10-25 19:29:58,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:29:58,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727097956] [2020-10-25 19:29:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:29:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:29:58,949 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 19:29:58,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727097956] [2020-10-25 19:29:58,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:29:58,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:29:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234625050] [2020-10-25 19:29:58,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:29:58,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:29:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:29:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:29:58,954 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-25 19:29:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:29:59,147 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-10-25 19:29:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:29:59,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-25 19:29:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:29:59,150 INFO L225 Difference]: With dead ends: 57 [2020-10-25 19:29:59,150 INFO L226 Difference]: Without dead ends: 38 [2020-10-25 19:29:59,151 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 19:29:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-25 19:29:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-25 19:29:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-25 19:29:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-25 19:29:59,160 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2020-10-25 19:29:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:29:59,160 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-25 19:29:59,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:29:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-25 19:29:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 19:29:59,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:29:59,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:29:59,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 19:29:59,163 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:29:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:29:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2020-10-25 19:29:59,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:29:59,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657717384] [2020-10-25 19:29:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:29:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:29:59,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:29:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:29:59,399 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:29:59,438 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:29:59,438 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:29:59,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 19:29:59,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:29:59 BoogieIcfgContainer [2020-10-25 19:29:59,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:29:59,500 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:29:59,500 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:29:59,501 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:29:59,501 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:29:58" (3/4) ... [2020-10-25 19:29:59,504 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:29:59,584 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:29:59,584 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:29:59,587 INFO L168 Benchmark]: Toolchain (without parser) took 2344.14 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.1 MB in the beginning and 25.5 MB in the end (delta: -407.7 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-25 19:29:59,587 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 48.2 MB. Free memory was 31.2 MB in the beginning and 31.1 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:29:59,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 442.01 ms. Allocated memory is still 48.2 MB. Free memory was 24.4 MB in the beginning and 27.5 MB in the end (delta: -3.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 19:29:59,589 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.84 ms. Allocated memory is still 48.2 MB. Free memory was 27.4 MB in the beginning and 25.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:29:59,589 INFO L168 Benchmark]: Boogie Preprocessor took 34.32 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 24.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:29:59,590 INFO L168 Benchmark]: RCFGBuilder took 468.02 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.4 MB in the beginning and 40.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2020-10-25 19:29:59,591 INFO L168 Benchmark]: TraceAbstraction took 1251.69 ms. Allocated memory is still 58.7 MB. Free memory was 39.8 MB in the beginning and 29.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:29:59,592 INFO L168 Benchmark]: Witness Printer took 83.96 ms. Allocated memory is still 58.7 MB. Free memory was 29.4 MB in the beginning and 25.5 MB in the end (delta: 3.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:29:59,596 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 48.2 MB. Free memory was 31.2 MB in the beginning and 31.1 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 442.01 ms. Allocated memory is still 48.2 MB. Free memory was 24.4 MB in the beginning and 27.5 MB in the end (delta: -3.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.84 ms. Allocated memory is still 48.2 MB. Free memory was 27.4 MB in the beginning and 25.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.32 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 24.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 468.02 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.4 MB in the beginning and 40.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1251.69 ms. Allocated memory is still 58.7 MB. Free memory was 39.8 MB in the beginning and 29.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Witness Printer took 83.96 ms. Allocated memory is still 58.7 MB. Free memory was 29.4 MB in the beginning and 25.5 MB in the end (delta: 3.9 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); [L30] int *b = malloc(sizeof(int)*N); [L31] int *c = malloc(sizeof(int)*N); [L33] sum[0] = 1 [L34] i=0 VAL [N=1] [L34] COND TRUE i