./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s42iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/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 4db4acc547fc47718f6e9c56f06e455b513ebefb ...................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-678e011 [2019-11-20 01:35:33,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 01:35:33,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 01:35:33,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 01:35:33,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 01:35:33,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 01:35:33,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 01:35:33,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 01:35:33,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 01:35:33,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 01:35:33,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 01:35:34,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 01:35:34,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 01:35:34,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 01:35:34,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 01:35:34,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 01:35:34,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 01:35:34,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 01:35:34,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 01:35:34,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 01:35:34,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 01:35:34,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 01:35:34,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 01:35:34,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 01:35:34,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 01:35:34,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 01:35:34,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 01:35:34,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 01:35:34,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 01:35:34,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 01:35:34,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 01:35:34,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 01:35:34,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 01:35:34,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 01:35:34,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 01:35:34,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 01:35:34,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 01:35:34,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 01:35:34,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 01:35:34,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 01:35:34,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 01:35:34,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 01:35:34,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 01:35:34,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 01:35:34,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 01:35:34,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 01:35:34,054 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 01:35:34,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 01:35:34,055 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 01:35:34,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 01:35:34,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 01:35:34,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 01:35:34,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 01:35:34,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 01:35:34,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 01:35:34,057 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 01:35:34,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 01:35:34,057 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 01:35:34,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 01:35:34,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 01:35:34,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 01:35:34,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 01:35:34,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 01:35:34,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 01:35:34,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 01:35:34,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 01:35:34,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 01:35:34,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 01:35:34,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 01:35:34,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 01:35:34,060 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_2e9def28-95ac-46a2-9231-f94855453f1c/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 -> 4db4acc547fc47718f6e9c56f06e455b513ebefb [2019-11-20 01:35:34,191 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 01:35:34,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 01:35:34,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 01:35:34,206 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 01:35:34,206 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 01:35:34,207 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s42iff.c [2019-11-20 01:35:34,259 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/data/dd9bf131c/edf2dc879f354a6b8be585f55f39af13/FLAG676f1fd4e [2019-11-20 01:35:34,567 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 01:35:34,568 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/sv-benchmarks/c/array-fpi/s42iff.c [2019-11-20 01:35:34,574 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/data/dd9bf131c/edf2dc879f354a6b8be585f55f39af13/FLAG676f1fd4e [2019-11-20 01:35:34,977 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/data/dd9bf131c/edf2dc879f354a6b8be585f55f39af13 [2019-11-20 01:35:34,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 01:35:34,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 01:35:34,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 01:35:34,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 01:35:34,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 01:35:34,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:35:34" (1/1) ... [2019-11-20 01:35:34,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b0a94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:34, skipping insertion in model container [2019-11-20 01:35:34,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:35:34" (1/1) ... [2019-11-20 01:35:34,994 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 01:35:35,008 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 01:35:35,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:35:35,228 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 01:35:35,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:35:35,352 INFO L192 MainTranslator]: Completed translation [2019-11-20 01:35:35,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35 WrapperNode [2019-11-20 01:35:35,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 01:35:35,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 01:35:35,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 01:35:35,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 01:35:35,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 01:35:35,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 01:35:35,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 01:35:35,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 01:35:35,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... [2019-11-20 01:35:35,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 01:35:35,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 01:35:35,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 01:35:35,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 01:35:35,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/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 [2019-11-20 01:35:35,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 01:35:35,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 01:35:35,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 01:35:35,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 01:35:35,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 01:35:35,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 01:35:35,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 01:35:35,827 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 01:35:35,827 INFO L285 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-20 01:35:35,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:35:35 BoogieIcfgContainer [2019-11-20 01:35:35,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 01:35:35,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 01:35:35,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 01:35:35,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 01:35:35,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 01:35:34" (1/3) ... [2019-11-20 01:35:35,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563d034a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:35:35, skipping insertion in model container [2019-11-20 01:35:35,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:35:35" (2/3) ... [2019-11-20 01:35:35,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563d034a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:35:35, skipping insertion in model container [2019-11-20 01:35:35,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:35:35" (3/3) ... [2019-11-20 01:35:35,836 INFO L109 eAbstractionObserver]: Analyzing ICFG s42iff.c [2019-11-20 01:35:35,845 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 01:35:35,851 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 01:35:35,862 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 01:35:35,888 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 01:35:35,890 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 01:35:35,890 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 01:35:35,890 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 01:35:35,890 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 01:35:35,890 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 01:35:35,891 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 01:35:35,891 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 01:35:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-20 01:35:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 01:35:35,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:35:35,913 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:35:35,913 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:35:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:35:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1306747820, now seen corresponding path program 1 times [2019-11-20 01:35:35,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:35:35,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092718107] [2019-11-20 01:35:35,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:35:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:35:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:35:36,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092718107] [2019-11-20 01:35:36,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:35:36,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 01:35:36,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554939359] [2019-11-20 01:35:36,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 01:35:36,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:35:36,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 01:35:36,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 01:35:36,076 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-20 01:35:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:35:36,090 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2019-11-20 01:35:36,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 01:35:36,091 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-20 01:35:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:35:36,100 INFO L225 Difference]: With dead ends: 37 [2019-11-20 01:35:36,100 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 01:35:36,102 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 [2019-11-20 01:35:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 01:35:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 01:35:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 01:35:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-20 01:35:36,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2019-11-20 01:35:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:35:36,137 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-20 01:35:36,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 01:35:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-20 01:35:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 01:35:36,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:35:36,138 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:35:36,138 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:35:36,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:35:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash -875427960, now seen corresponding path program 1 times [2019-11-20 01:35:36,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:35:36,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205442807] [2019-11-20 01:35:36,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:35:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:35:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:35:36,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205442807] [2019-11-20 01:35:36,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:35:36,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 01:35:36,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247926972] [2019-11-20 01:35:36,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 01:35:36,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:35:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 01:35:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 01:35:36,227 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2019-11-20 01:35:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:35:36,312 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-11-20 01:35:36,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 01:35:36,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-20 01:35:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:35:36,313 INFO L225 Difference]: With dead ends: 31 [2019-11-20 01:35:36,313 INFO L226 Difference]: Without dead ends: 19 [2019-11-20 01:35:36,314 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 [2019-11-20 01:35:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-20 01:35:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-20 01:35:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-20 01:35:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-20 01:35:36,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2019-11-20 01:35:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:35:36,320 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-20 01:35:36,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 01:35:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-20 01:35:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 01:35:36,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:35:36,321 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:35:36,321 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:35:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:35:36,322 INFO L82 PathProgramCache]: Analyzing trace with hash -100045206, now seen corresponding path program 1 times [2019-11-20 01:35:36,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:35:36,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901280848] [2019-11-20 01:35:36,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:35:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:35:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:35:36,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901280848] [2019-11-20 01:35:36,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:35:36,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 01:35:36,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373560621] [2019-11-20 01:35:36,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 01:35:36,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:35:36,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 01:35:36,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 01:35:36,379 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2019-11-20 01:35:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:35:36,462 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2019-11-20 01:35:36,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 01:35:36,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-20 01:35:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:35:36,464 INFO L225 Difference]: With dead ends: 33 [2019-11-20 01:35:36,464 INFO L226 Difference]: Without dead ends: 25 [2019-11-20 01:35:36,464 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 [2019-11-20 01:35:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-20 01:35:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2019-11-20 01:35:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 01:35:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-20 01:35:36,469 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2019-11-20 01:35:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:35:36,469 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-20 01:35:36,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 01:35:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-20 01:35:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 01:35:36,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:35:36,470 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:35:36,470 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:35:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:35:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash -682929213, now seen corresponding path program 1 times [2019-11-20 01:35:36,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:35:36,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977826023] [2019-11-20 01:35:36,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:35:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:35:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:35:36,574 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:35:36,574 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 01:35:36,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 01:35:36 BoogieIcfgContainer [2019-11-20 01:35:36,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 01:35:36,604 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 01:35:36,604 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 01:35:36,604 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 01:35:36,605 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:35:35" (3/4) ... [2019-11-20 01:35:36,606 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 01:35:36,655 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2e9def28-95ac-46a2-9231-f94855453f1c/bin/uautomizer/witness.graphml [2019-11-20 01:35:36,655 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 01:35:36,657 INFO L168 Benchmark]: Toolchain (without parser) took 1675.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -100.8 MB). Peak memory consumption was 28.1 MB. Max. memory is 11.5 GB. [2019-11-20 01:35:36,658 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:35:36,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -172.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 01:35:36,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.81 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. [2019-11-20 01:35:36,659 INFO L168 Benchmark]: Boogie Preprocessor took 41.68 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. [2019-11-20 01:35:36,660 INFO L168 Benchmark]: RCFGBuilder took 392.11 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-20 01:35:36,660 INFO L168 Benchmark]: TraceAbstraction took 774.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 49.6 MB). Peak memory consumption was 49.6 MB. Max. memory is 11.5 GB. [2019-11-20 01:35:36,661 INFO L168 Benchmark]: Witness Printer took 51.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:35:36,663 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 372.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -172.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.81 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 41.68 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 392.11 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 774.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 49.6 MB). Peak memory consumption was 49.6 MB. Max. memory is 11.5 GB. * Witness Printer took 51.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 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] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 1 [L27] i=0 VAL [N=1] [L27] COND TRUE i