./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s42iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s42iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df76dc7d0ac543fbddd8f2c3a328df8f807c4a47 ......................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2021-10-11 02:27:18,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:18,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:18,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:18,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:18,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:18,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:18,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:18,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:18,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:18,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:18,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:18,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:18,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:18,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:18,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:18,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:18,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:18,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:18,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:18,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:18,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:18,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:18,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:18,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:18,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:18,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:18,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:18,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:18,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:18,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:18,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:18,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:18,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:18,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:18,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:18,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:18,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:18,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:18,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:18,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:18,124 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:27:18,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:18,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:18,152 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:18,152 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:18,153 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:18,153 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:18,153 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:18,153 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:18,154 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:18,154 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:18,154 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:18,154 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:18,155 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:18,155 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:18,155 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:18,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:18,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:27:18,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:18,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:27:18,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:18,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:27:18,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:18,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:27:18,158 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:27:18,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:27:18,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:27:18,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:18,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:27:18,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:18,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:18,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:18,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:18,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:18,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:27:18,160 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:18,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:18,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:27:18,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:18,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:18,161 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df76dc7d0ac543fbddd8f2c3a328df8f807c4a47 [2021-10-11 02:27:18,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:18,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:18,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:18,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:18,436 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:18,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/s42iff.c [2021-10-11 02:27:18,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/data/5694b4deb/8da3e7a5e7874e31b88973a24479025a/FLAG1a1be2cd5 [2021-10-11 02:27:19,032 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:19,033 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/sv-benchmarks/c/array-fpi/s42iff.c [2021-10-11 02:27:19,040 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/data/5694b4deb/8da3e7a5e7874e31b88973a24479025a/FLAG1a1be2cd5 [2021-10-11 02:27:19,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/data/5694b4deb/8da3e7a5e7874e31b88973a24479025a [2021-10-11 02:27:19,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:19,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:19,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:19,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:19,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:19,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54743cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19, skipping insertion in model container [2021-10-11 02:27:19,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:19,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:19,625 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/sv-benchmarks/c/array-fpi/s42iff.c[589,602] [2021-10-11 02:27:19,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:19,664 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:19,675 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/sv-benchmarks/c/array-fpi/s42iff.c[589,602] [2021-10-11 02:27:19,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:19,703 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:19,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19 WrapperNode [2021-10-11 02:27:19,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:19,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:19,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:19,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:19,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:19,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:19,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:19,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:19,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... [2021-10-11 02:27:19,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:19,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:19,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:19,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:19,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:27:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:27:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:27:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:27:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:19,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:19,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:27:19,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:27:20,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:20,483 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:27:20,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:20 BoogieIcfgContainer [2021-10-11 02:27:20,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:20,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:20,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:20,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:20,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:19" (1/3) ... [2021-10-11 02:27:20,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a83641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:20, skipping insertion in model container [2021-10-11 02:27:20,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:19" (2/3) ... [2021-10-11 02:27:20,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a83641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:20, skipping insertion in model container [2021-10-11 02:27:20,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:20" (3/3) ... [2021-10-11 02:27:20,499 INFO L111 eAbstractionObserver]: Analyzing ICFG s42iff.c [2021-10-11 02:27:20,520 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:20,526 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:27:20,538 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:27:20,592 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:20,592 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:27:20,593 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:20,593 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:20,593 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:20,593 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:20,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:20,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:27:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:27:20,614 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:20,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:20,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1699641303, now seen corresponding path program 1 times [2021-10-11 02:27:20,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:20,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575282542] [2021-10-11 02:27:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:20,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575282542] [2021-10-11 02:27:20,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:20,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:20,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326598664] [2021-10-11 02:27:20,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:20,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:20,907 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2021-10-11 02:27:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:20,953 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-11 02:27:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:20,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-10-11 02:27:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:20,968 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:27:20,969 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:27:20,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:27:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:27:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:27:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-10-11 02:27:21,006 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-10-11 02:27:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:21,006 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-10-11 02:27:21,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-10-11 02:27:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:27:21,007 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:21,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:21,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:21,007 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1490809349, now seen corresponding path program 1 times [2021-10-11 02:27:21,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:21,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588860644] [2021-10-11 02:27:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:27:21,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588860644] [2021-10-11 02:27:21,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:21,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:27:21,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270910283] [2021-10-11 02:27:21,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:21,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:21,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:21,143 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2021-10-11 02:27:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:21,194 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-10-11 02:27:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:21,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:27:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:21,196 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:27:21,196 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:27:21,197 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 [2021-10-11 02:27:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:27:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:27:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:27:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:27:21,200 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:27:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:21,201 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:27:21,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:21,201 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:27:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:27:21,202 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:21,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:21,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:27:21,202 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1799146020, now seen corresponding path program 1 times [2021-10-11 02:27:21,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:21,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174786196] [2021-10-11 02:27:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:21,225 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:27:21,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672793291] [2021-10-11 02:27:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:27:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:27:21,313 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:27:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:27:21,345 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:27:21,406 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:27:21,407 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:27:21,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:27:21,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:21 BoogieIcfgContainer [2021-10-11 02:27:21,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:21,660 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:21,660 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:21,660 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:21,661 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:20" (3/4) ... [2021-10-11 02:27:21,663 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:27:21,722 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a372235-3f13-426f-83ee-aa850f1514d3/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:21,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:21,724 INFO L168 Benchmark]: Toolchain (without parser) took 2323.44 ms. Allocated memory is still 117.4 MB. Free memory was 85.7 MB in the beginning and 92.4 MB in the end (delta: -6.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:21,724 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:21,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.21 ms. Allocated memory is still 117.4 MB. Free memory was 85.4 MB in the beginning and 93.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,726 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.03 ms. Allocated memory is still 117.4 MB. Free memory was 93.8 MB in the beginning and 92.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,726 INFO L168 Benchmark]: Boogie Preprocessor took 29.75 ms. Allocated memory is still 117.4 MB. Free memory was 92.1 MB in the beginning and 90.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,727 INFO L168 Benchmark]: RCFGBuilder took 709.52 ms. Allocated memory is still 117.4 MB. Free memory was 90.9 MB in the beginning and 62.8 MB in the end (delta: 28.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,728 INFO L168 Benchmark]: TraceAbstraction took 1172.91 ms. Allocated memory is still 117.4 MB. Free memory was 62.4 MB in the beginning and 94.5 MB in the end (delta: -32.1 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,729 INFO L168 Benchmark]: Witness Printer took 62.27 ms. Allocated memory is still 117.4 MB. Free memory was 94.5 MB in the beginning and 92.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,732 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 83.9 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.21 ms. Allocated memory is still 117.4 MB. Free memory was 85.4 MB in the beginning and 93.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.03 ms. Allocated memory is still 117.4 MB. Free memory was 93.8 MB in the beginning and 92.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.75 ms. Allocated memory is still 117.4 MB. Free memory was 92.1 MB in the beginning and 90.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 709.52 ms. Allocated memory is still 117.4 MB. Free memory was 90.9 MB in the beginning and 62.8 MB in the end (delta: 28.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1172.91 ms. Allocated memory is still 117.4 MB. Free memory was 62.4 MB in the beginning and 94.5 MB in the end (delta: -32.1 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 62.27 ms. Allocated memory is still 117.4 MB. Free memory was 94.5 MB in the beginning and 92.4 MB in the end (delta: 2.1 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=1] [L32] COND TRUE i