./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina1f.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_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sina1f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/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 f88484bf8eb6002ef5835ac29cdb81fab8166cf6 ......................................................................................................................................................................................................................................................................................................................................................................... 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 17:20:27,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:20:27,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:20:27,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:20:27,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:20:27,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:20:27,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:20:27,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:20:27,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:20:27,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:20:27,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:20:27,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:20:27,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:20:27,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:20:27,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:20:27,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:20:27,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:20:27,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:20:27,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:20:27,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:20:27,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:20:27,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:20:27,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:20:27,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:20:27,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:20:27,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:20:27,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:20:27,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:20:27,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:20:27,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:20:27,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:20:27,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:20:27,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:20:27,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:20:27,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:20:27,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:20:27,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:20:27,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:20:27,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:20:27,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:20:27,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:20:27,517 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:20:27,527 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:20:27,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:20:27,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:20:27,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:20:27,528 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:20:27,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:20:27,528 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:20:27,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:20:27,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:20:27,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:20:27,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:20:27,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:20:27,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:20:27,529 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:20:27,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:20:27,530 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:20:27,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:20:27,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:20:27,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:20:27,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:20:27,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:20:27,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:20:27,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:20:27,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:20:27,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:20:27,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:20:27,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:20:27,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:20:27,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:20:27,531 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_c08f2e96-a719-4194-9043-e67fb4e66067/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 -> f88484bf8eb6002ef5835ac29cdb81fab8166cf6 [2019-12-07 17:20:27,630 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:20:27,637 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:20:27,640 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:20:27,640 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:20:27,641 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:20:27,641 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/../../sv-benchmarks/c/array-fpi/sina1f.c [2019-12-07 17:20:27,678 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/data/bd93b09d3/d4666e9790f549d3ad39c7ebd041c1ed/FLAGf5e127222 [2019-12-07 17:20:28,044 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:20:28,044 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/sv-benchmarks/c/array-fpi/sina1f.c [2019-12-07 17:20:28,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/data/bd93b09d3/d4666e9790f549d3ad39c7ebd041c1ed/FLAGf5e127222 [2019-12-07 17:20:28,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/data/bd93b09d3/d4666e9790f549d3ad39c7ebd041c1ed [2019-12-07 17:20:28,058 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:20:28,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:20:28,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:20:28,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:20:28,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:20:28,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2516fdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28, skipping insertion in model container [2019-12-07 17:20:28,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:20:28,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:20:28,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:20:28,231 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:20:28,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:20:28,254 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:20:28,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28 WrapperNode [2019-12-07 17:20:28,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:20:28,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:20:28,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:20:28,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:20:28,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:20:28,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:20:28,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:20:28,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:20:28,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... [2019-12-07 17:20:28,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:20:28,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:20:28,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:20:28,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:20:28,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/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 17:20:28,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 17:20:28,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 17:20:28,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:20:28,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:20:28,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:20:28,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 17:20:28,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:20:28,461 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:20:28,461 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 17:20:28,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:20:28 BoogieIcfgContainer [2019-12-07 17:20:28,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:20:28,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:20:28,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:20:28,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:20:28,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:20:28" (1/3) ... [2019-12-07 17:20:28,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bbfb79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:20:28, skipping insertion in model container [2019-12-07 17:20:28,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:20:28" (2/3) ... [2019-12-07 17:20:28,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bbfb79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:20:28, skipping insertion in model container [2019-12-07 17:20:28,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:20:28" (3/3) ... [2019-12-07 17:20:28,466 INFO L109 eAbstractionObserver]: Analyzing ICFG sina1f.c [2019-12-07 17:20:28,473 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:20:28,477 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:20:28,484 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:20:28,498 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:20:28,498 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:20:28,498 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:20:28,499 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:20:28,499 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:20:28,499 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:20:28,499 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:20:28,499 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:20:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-12-07 17:20:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 17:20:28,512 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:20:28,512 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:20:28,512 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:20:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:20:28,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1486647931, now seen corresponding path program 1 times [2019-12-07 17:20:28,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:20:28,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862786795] [2019-12-07 17:20:28,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:20:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:20:28,612 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 17:20:28,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862786795] [2019-12-07 17:20:28,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:20:28,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:20:28,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979760924] [2019-12-07 17:20:28,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:20:28,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:20:28,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:20:28,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:20:28,627 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-12-07 17:20:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:20:28,638 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-12-07 17:20:28,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:20:28,639 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-12-07 17:20:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:20:28,645 INFO L225 Difference]: With dead ends: 33 [2019-12-07 17:20:28,645 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 17:20:28,647 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 17:20:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 17:20:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-12-07 17:20:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 17:20:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-12-07 17:20:28,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-12-07 17:20:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:20:28,668 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-07 17:20:28,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:20:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-12-07 17:20:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 17:20:28,669 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:20:28,669 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:20:28,669 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:20:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:20:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1772723449, now seen corresponding path program 1 times [2019-12-07 17:20:28,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:20:28,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910821091] [2019-12-07 17:20:28,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:20:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:20:28,713 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 17:20:28,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910821091] [2019-12-07 17:20:28,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:20:28,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:20:28,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841218628] [2019-12-07 17:20:28,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:20:28,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:20:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:20:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:20:28,716 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-12-07 17:20:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:20:28,742 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-12-07 17:20:28,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:20:28,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-12-07 17:20:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:20:28,743 INFO L225 Difference]: With dead ends: 27 [2019-12-07 17:20:28,743 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 17:20:28,744 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 17:20:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 17:20:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-12-07 17:20:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 17:20:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-12-07 17:20:28,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-12-07 17:20:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:20:28,746 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-12-07 17:20:28,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:20:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-12-07 17:20:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 17:20:28,747 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:20:28,747 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:20:28,747 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:20:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:20:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash 827904471, now seen corresponding path program 1 times [2019-12-07 17:20:28,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:20:28,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007290309] [2019-12-07 17:20:28,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:20:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:20:28,783 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 17:20:28,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007290309] [2019-12-07 17:20:28,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:20:28,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:20:28,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308371208] [2019-12-07 17:20:28,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:20:28,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:20:28,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:20:28,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:20:28,784 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2019-12-07 17:20:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:20:28,813 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-12-07 17:20:28,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:20:28,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-12-07 17:20:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:20:28,814 INFO L225 Difference]: With dead ends: 32 [2019-12-07 17:20:28,814 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 17:20:28,814 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 17:20:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 17:20:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2019-12-07 17:20:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 17:20:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-12-07 17:20:28,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-12-07 17:20:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:20:28,817 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-12-07 17:20:28,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:20:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-12-07 17:20:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 17:20:28,818 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:20:28,818 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:20:28,818 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:20:28,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:20:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1602337035, now seen corresponding path program 1 times [2019-12-07 17:20:28,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:20:28,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607582720] [2019-12-07 17:20:28,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:20:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:20:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:20:28,865 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:20:28,866 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:20:28,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:20:28 BoogieIcfgContainer [2019-12-07 17:20:28,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:20:28,886 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:20:28,886 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:20:28,886 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:20:28,886 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:20:28" (3/4) ... [2019-12-07 17:20:28,888 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 17:20:28,919 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c08f2e96-a719-4194-9043-e67fb4e66067/bin/uautomizer/witness.graphml [2019-12-07 17:20:28,919 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:20:28,920 INFO L168 Benchmark]: Toolchain (without parser) took 860.77 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 74.4 MB). Free memory was 939.3 MB in the beginning and 997.7 MB in the end (delta: -58.3 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:20:28,921 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:20:28,921 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 74.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -129.9 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:20:28,921 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.64 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:20:28,921 INFO L168 Benchmark]: Boogie Preprocessor took 15.92 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:20:28,922 INFO L168 Benchmark]: RCFGBuilder took 166.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:20:28,922 INFO L168 Benchmark]: TraceAbstraction took 423.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 997.7 MB in the end (delta: 49.7 MB). Peak memory consumption was 49.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:20:28,922 INFO L168 Benchmark]: Witness Printer took 33.09 ms. Allocated memory is still 1.1 GB. Free memory is still 997.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:20:28,924 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 195.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 74.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -129.9 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.64 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.92 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 166.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 423.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 997.7 MB in the end (delta: 49.7 MB). Peak memory consumption was 49.7 MB. Max. memory is 11.5 GB. * Witness Printer took 33.09 ms. Allocated memory is still 1.1 GB. Free memory is still 997.7 MB. 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 sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 1 [L27] i=0 VAL [N=1] [L27] COND TRUE i