./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sqmf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sqmf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fecc72cfd370488916dec9e886b2adb7be87af7f ................................................................................................................................................................................................................................................................................................................ 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 0.2.1-dev-4e77c04 [2021-10-13 00:50:34,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:50:34,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:50:34,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:50:34,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:50:34,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:50:34,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:50:34,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:50:34,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:50:34,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:50:34,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:50:34,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:50:34,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:50:34,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:50:34,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:50:34,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:50:34,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:50:34,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:50:34,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:50:34,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:50:34,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:50:34,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:50:34,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:50:34,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:50:34,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:50:34,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:50:34,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:50:34,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:50:34,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:50:34,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:50:34,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:50:34,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:50:34,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:50:34,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:50:34,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:50:34,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:50:34,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:50:34,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:50:34,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:50:34,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:50:34,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:50:34,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:50:34,810 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:50:34,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:50:34,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:50:34,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:50:34,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:50:34,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:50:34,820 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:50:34,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:50:34,820 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:50:34,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:50:34,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:50:34,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:50:34,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:50:34,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:50:34,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:50:34,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:50:34,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:50:34,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:50:34,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:50:34,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:50:34,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:50:34,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:50:34,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:50:34,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:50:34,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:50:34,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:50:34,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:50:34,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:50:34,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:50:34,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:50:34,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fecc72cfd370488916dec9e886b2adb7be87af7f [2021-10-13 00:50:35,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:50:35,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:50:35,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:50:35,205 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:50:35,206 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:50:35,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/array-fpi/sqmf.c [2021-10-13 00:50:35,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/data/ef25034d8/3de874f5b2c14186ac04d58df9a669ff/FLAG7cdd0b338 [2021-10-13 00:50:35,770 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:50:35,772 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/sv-benchmarks/c/array-fpi/sqmf.c [2021-10-13 00:50:35,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/data/ef25034d8/3de874f5b2c14186ac04d58df9a669ff/FLAG7cdd0b338 [2021-10-13 00:50:36,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/data/ef25034d8/3de874f5b2c14186ac04d58df9a669ff [2021-10-13 00:50:36,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:50:36,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:50:36,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:50:36,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:50:36,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:50:36,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4c1f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36, skipping insertion in model container [2021-10-13 00:50:36,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:50:36,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:50:36,406 WARN L228 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_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/sv-benchmarks/c/array-fpi/sqmf.c[587,600] [2021-10-13 00:50:36,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:50:36,455 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:50:36,474 WARN L228 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_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/sv-benchmarks/c/array-fpi/sqmf.c[587,600] [2021-10-13 00:50:36,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:50:36,507 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:50:36,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36 WrapperNode [2021-10-13 00:50:36,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:50:36,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:50:36,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:50:36,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:50:36,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:50:36,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:50:36,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:50:36,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:50:36,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:50:36,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:50:36,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:50:36,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:50:36,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (1/1) ... [2021-10-13 00:50:36,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:50:36,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:50:36,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:50:36,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:50:36,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:50:36,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:50:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:50:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:50:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:50:36,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:50:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:50:37,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:50:37,049 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 00:50:37,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:50:37 BoogieIcfgContainer [2021-10-13 00:50:37,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:50:37,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:50:37,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:50:37,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:50:37,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:50:36" (1/3) ... [2021-10-13 00:50:37,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@334c692a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:50:37, skipping insertion in model container [2021-10-13 00:50:37,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:36" (2/3) ... [2021-10-13 00:50:37,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@334c692a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:50:37, skipping insertion in model container [2021-10-13 00:50:37,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:50:37" (3/3) ... [2021-10-13 00:50:37,060 INFO L111 eAbstractionObserver]: Analyzing ICFG sqmf.c [2021-10-13 00:50:37,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:50:37,077 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:50:37,171 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:50:37,181 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:50:37,181 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:50:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:50:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:50:37,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:37,204 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:37,205 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:50:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-10-13 00:50:37,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:50:37,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266300892] [2021-10-13 00:50:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:37,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:50:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:50:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:37,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:50:37,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266300892] [2021-10-13 00:50:37,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266300892] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:50:37,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:50:37,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:50:37,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438043438] [2021-10-13 00:50:37,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:50:37,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:50:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:50:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:50:37,484 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:50:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:50:37,500 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-10-13 00:50:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:50:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 00:50:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:50:37,510 INFO L225 Difference]: With dead ends: 38 [2021-10-13 00:50:37,510 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 00:50:37,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:50:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 00:50:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 00:50:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:50:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 00:50:37,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-10-13 00:50:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:50:37,548 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 00:50:37,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:50:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 00:50:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:50:37,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:37,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:37,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:50:37,550 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:50:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-10-13 00:50:37,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:50:37,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034998096] [2021-10-13 00:50:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:37,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:50:37,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:50:37,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748651798] [2021-10-13 00:50:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:37,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:50:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:50:37,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:50:37,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:50:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:50:37,714 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:50:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:50:37,774 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:50:37,774 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:50:37,777 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:50:37,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:50:38,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:50:38,005 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:50:38,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:50:38 BoogieIcfgContainer [2021-10-13 00:50:38,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:50:38,030 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:50:38,030 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:50:38,030 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:50:38,031 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:50:37" (3/4) ... [2021-10-13 00:50:38,032 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:50:38,072 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539a09e-ba6a-4e13-b870-9d4a8c7ab42b/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:50:38,073 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:50:38,077 INFO L168 Benchmark]: Toolchain (without parser) took 1934.06 ms. Allocated memory is still 125.8 MB. Free memory was 89.8 MB in the beginning and 56.2 MB in the end (delta: 33.5 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:50:38,078 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 101.2 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:50:38,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.93 ms. Allocated memory is still 125.8 MB. Free memory was 89.4 MB in the beginning and 98.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:50:38,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.36 ms. Allocated memory is still 125.8 MB. Free memory was 98.9 MB in the beginning and 97.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:50:38,080 INFO L168 Benchmark]: Boogie Preprocessor took 51.78 ms. Allocated memory is still 125.8 MB. Free memory was 97.6 MB in the beginning and 96.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:50:38,080 INFO L168 Benchmark]: RCFGBuilder took 427.62 ms. Allocated memory is still 125.8 MB. Free memory was 96.1 MB in the beginning and 85.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:50:38,081 INFO L168 Benchmark]: TraceAbstraction took 977.04 ms. Allocated memory is still 125.8 MB. Free memory was 84.2 MB in the beginning and 58.1 MB in the end (delta: 26.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:50:38,082 INFO L168 Benchmark]: Witness Printer took 42.71 ms. Allocated memory is still 125.8 MB. Free memory was 58.1 MB in the beginning and 56.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:50:38,086 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 125.8 MB. Free memory was 101.3 MB in the beginning and 101.2 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 366.93 ms. Allocated memory is still 125.8 MB. Free memory was 89.4 MB in the beginning and 98.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.36 ms. Allocated memory is still 125.8 MB. Free memory was 98.9 MB in the beginning and 97.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.78 ms. Allocated memory is still 125.8 MB. Free memory was 97.6 MB in the beginning and 96.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 427.62 ms. Allocated memory is still 125.8 MB. Free memory was 96.1 MB in the beginning and 85.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 977.04 ms. Allocated memory is still 125.8 MB. Free memory was 84.2 MB in the beginning and 58.1 MB in the end (delta: 26.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 42.71 ms. Allocated memory is still 125.8 MB. Free memory was 58.1 MB in the beginning and 56.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] b[0] = 0 [L32] a[0] = 0 [L34] i=1 VAL [N=1] [L34] COND FALSE !(i