./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condnf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condnf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f3b39298cedfd910357326131ebb504a4d33fa54 ....................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 17:15:17,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:15:17,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:15:17,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:15:17,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:15:17,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:15:17,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:15:17,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:15:17,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:15:17,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:15:17,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:15:17,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:15:17,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:15:17,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:15:17,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:15:17,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:15:17,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:15:17,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:15:17,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:15:17,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:15:17,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:15:17,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:15:17,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:15:17,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:15:17,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:15:17,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:15:17,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:15:17,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:15:17,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:15:17,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:15:17,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:15:17,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:15:17,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:15:17,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:15:17,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:15:17,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:15:17,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:15:17,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:15:17,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:15:17,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:15:17,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:15:17,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:15:17,932 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:15:17,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:15:17,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:15:17,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:15:17,933 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:15:17,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:15:17,933 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:15:17,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:15:17,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:15:17,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:15:17,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:15:17,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:15:17,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:15:17,934 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:15:17,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:15:17,934 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:15:17,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:15:17,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:15:17,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:15:17,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:15:17,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:15:17,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:15:17,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:15:17,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:15:17,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:15:17,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:15:17,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:15:17,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:15:17,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:15:17,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_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 -> f3b39298cedfd910357326131ebb504a4d33fa54 [2019-12-07 17:15:18,035 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:15:18,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:15:18,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:15:18,047 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:15:18,048 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:15:18,048 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/../../sv-benchmarks/c/array-fpi/condnf.c [2019-12-07 17:15:18,094 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/data/4546668fa/4a872628acdc4127be70dd4951b3f096/FLAG4f0f19962 [2019-12-07 17:15:18,518 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:15:18,518 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/sv-benchmarks/c/array-fpi/condnf.c [2019-12-07 17:15:18,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/data/4546668fa/4a872628acdc4127be70dd4951b3f096/FLAG4f0f19962 [2019-12-07 17:15:18,531 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/data/4546668fa/4a872628acdc4127be70dd4951b3f096 [2019-12-07 17:15:18,533 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:15:18,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:15:18,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:15:18,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:15:18,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:15:18,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b32c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18, skipping insertion in model container [2019-12-07 17:15:18,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:15:18,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:15:18,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:15:18,692 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:15:18,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:15:18,717 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:15:18,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18 WrapperNode [2019-12-07 17:15:18,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:15:18,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:15:18,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:15:18,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:15:18,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:15:18,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:15:18,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:15:18,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:15:18,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... [2019-12-07 17:15:18,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:15:18,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:15:18,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:15:18,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:15:18,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:15:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 17:15:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:15:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:15:18,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:15:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 17:15:18,931 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:15:18,931 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 17:15:18,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:18 BoogieIcfgContainer [2019-12-07 17:15:18,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:15:18,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:15:18,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:15:18,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:15:18,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:15:18" (1/3) ... [2019-12-07 17:15:18,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9d18da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:15:18, skipping insertion in model container [2019-12-07 17:15:18,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:18" (2/3) ... [2019-12-07 17:15:18,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9d18da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:15:18, skipping insertion in model container [2019-12-07 17:15:18,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:18" (3/3) ... [2019-12-07 17:15:18,937 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2019-12-07 17:15:18,943 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:15:18,947 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:15:18,954 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:15:18,968 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:15:18,968 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:15:18,968 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:15:18,968 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:15:18,968 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:15:18,968 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:15:18,968 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:15:18,968 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:15:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-12-07 17:15:18,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 17:15:18,981 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:18,981 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:18,982 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:18,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1481876406, now seen corresponding path program 1 times [2019-12-07 17:15:18,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:18,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543130788] [2019-12-07 17:15:18,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:19,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543130788] [2019-12-07 17:15:19,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:19,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:15:19,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113399825] [2019-12-07 17:15:19,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:15:19,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:15:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:15:19,099 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-12-07 17:15:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:19,110 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2019-12-07 17:15:19,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:15:19,110 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-12-07 17:15:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:19,116 INFO L225 Difference]: With dead ends: 35 [2019-12-07 17:15:19,116 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 17:15:19,118 INFO L630 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 [2019-12-07 17:15:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 17:15:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 17:15:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 17:15:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-12-07 17:15:19,140 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2019-12-07 17:15:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:19,140 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-12-07 17:15:19,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:15:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-12-07 17:15:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 17:15:19,141 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:19,141 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:19,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:19,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1772877369, now seen corresponding path program 1 times [2019-12-07 17:15:19,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:19,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583592505] [2019-12-07 17:15:19,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:19,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583592505] [2019-12-07 17:15:19,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:19,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:15:19,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918555930] [2019-12-07 17:15:19,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:15:19,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:15:19,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:15:19,192 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-12-07 17:15:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:19,224 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-12-07 17:15:19,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:15:19,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-12-07 17:15:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:19,225 INFO L225 Difference]: With dead ends: 29 [2019-12-07 17:15:19,225 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 17:15:19,226 INFO L630 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 [2019-12-07 17:15:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 17:15:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-12-07 17:15:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 17:15:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-12-07 17:15:19,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2019-12-07 17:15:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:19,229 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-12-07 17:15:19,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:15:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-12-07 17:15:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 17:15:19,229 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:19,230 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:19,230 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:19,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:19,230 INFO L82 PathProgramCache]: Analyzing trace with hash 828058391, now seen corresponding path program 1 times [2019-12-07 17:15:19,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:19,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764519759] [2019-12-07 17:15:19,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:15:19,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764519759] [2019-12-07 17:15:19,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:19,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:15:19,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921434916] [2019-12-07 17:15:19,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:15:19,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:19,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:15:19,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:15:19,263 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2019-12-07 17:15:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:19,296 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2019-12-07 17:15:19,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:15:19,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-12-07 17:15:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:19,297 INFO L225 Difference]: With dead ends: 34 [2019-12-07 17:15:19,297 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 17:15:19,297 INFO L630 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 [2019-12-07 17:15:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 17:15:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2019-12-07 17:15:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 17:15:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-12-07 17:15:19,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2019-12-07 17:15:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:19,300 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-12-07 17:15:19,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:15:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-12-07 17:15:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 17:15:19,301 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:19,301 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:19,301 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:19,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1290117262, now seen corresponding path program 1 times [2019-12-07 17:15:19,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:19,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564877827] [2019-12-07 17:15:19,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:15:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:15:19,370 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:15:19,371 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:15:19,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:15:19 BoogieIcfgContainer [2019-12-07 17:15:19,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:15:19,394 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:15:19,394 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:15:19,394 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:15:19,394 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:18" (3/4) ... [2019-12-07 17:15:19,396 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 17:15:19,426 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_21b4dfff-4a5c-49cf-9e29-6718eab0c77a/bin/uautomizer/witness.graphml [2019-12-07 17:15:19,426 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:15:19,428 INFO L168 Benchmark]: Toolchain (without parser) took 893.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -117.9 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:19,428 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:15:19,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -188.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:19,429 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.12 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:15:19,429 INFO L168 Benchmark]: Boogie Preprocessor took 19.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:15:19,429 INFO L168 Benchmark]: RCFGBuilder took 170.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:19,429 INFO L168 Benchmark]: TraceAbstraction took 460.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:19,430 INFO L168 Benchmark]: Witness Printer took 32.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:15:19,431 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 183.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -188.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.12 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 170.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 460.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 11.5 GB. * Witness Printer took 32.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 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: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] int *a = malloc(sizeof(int)*N); [L25] i=0 VAL [N=1] [L25] COND TRUE i N [L33] EXPR a[i] [L33] a[i] = a[i] [L30] i++ VAL [N=1] [L30] COND FALSE !(i