./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn4f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn4f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD --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 43c1de0381eac57fc6f4c99677f9636747c4cd8593c98dc51f3f286f262ef0fa ................................................................................................................................................................................................................................................................................................................... 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-b2eff8b [2021-10-28 23:41:21,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:41:21,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:41:21,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:41:21,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:41:21,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:41:21,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:41:21,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:41:21,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:41:21,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:41:21,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:41:21,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:41:21,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:41:21,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:41:21,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:41:21,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:41:21,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:41:21,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:41:21,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:41:21,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:41:21,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:41:21,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:41:21,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:41:21,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:41:22,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:41:22,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:41:22,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:41:22,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:41:22,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:41:22,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:41:22,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:41:22,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:41:22,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:41:22,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:41:22,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:41:22,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:41:22,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:41:22,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:41:22,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:41:22,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:41:22,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:41:22,032 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:41:22,082 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:41:22,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:41:22,093 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:41:22,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:41:22,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:41:22,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:41:22,100 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:41:22,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:41:22,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:41:22,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:41:22,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:41:22,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:41:22,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:41:22,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:41:22,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:41:22,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:41:22,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:41:22,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:41:22,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:41:22,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:41:22,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:41:22,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:41:22,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:41:22,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:41:22,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:41:22,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:41:22,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:41:22,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:41:22,107 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:41:22,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:41:22,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:41:22,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:41:22,111 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_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43c1de0381eac57fc6f4c99677f9636747c4cd8593c98dc51f3f286f262ef0fa [2021-10-28 23:41:22,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:41:22,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:41:22,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:41:22,475 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:41:22,477 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:41:22,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/array-fpi/eqn4f.c [2021-10-28 23:41:22,563 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/data/22c4d4db1/03c9ae503f24491f8536473605b6811f/FLAG77d1d0553 [2021-10-28 23:41:23,135 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:41:23,136 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/sv-benchmarks/c/array-fpi/eqn4f.c [2021-10-28 23:41:23,144 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/data/22c4d4db1/03c9ae503f24491f8536473605b6811f/FLAG77d1d0553 [2021-10-28 23:41:23,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/data/22c4d4db1/03c9ae503f24491f8536473605b6811f [2021-10-28 23:41:23,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:41:23,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:41:23,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:41:23,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:41:23,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:41:23,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a7f118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23, skipping insertion in model container [2021-10-28 23:41:23,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:41:23,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:41:23,757 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_27d472d3-27d8-440c-b8df-8753838cb5ae/sv-benchmarks/c/array-fpi/eqn4f.c[588,601] [2021-10-28 23:41:23,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:41:23,788 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:41:23,804 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_27d472d3-27d8-440c-b8df-8753838cb5ae/sv-benchmarks/c/array-fpi/eqn4f.c[588,601] [2021-10-28 23:41:23,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:41:23,830 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:41:23,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23 WrapperNode [2021-10-28 23:41:23,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:41:23,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:41:23,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:41:23,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:41:23,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:41:23,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:41:23,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:41:23,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:41:23,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:41:23,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:41:23,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:41:23,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:41:23,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (1/1) ... [2021-10-28 23:41:23,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:41:23,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:41:23,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:41:23,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:41:23,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:41:23,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:41:23,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:41:23,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:41:23,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:41:23,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:41:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:41:24,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:41:24,231 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-28 23:41:24,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:41:24 BoogieIcfgContainer [2021-10-28 23:41:24,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:41:24,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:41:24,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:41:24,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:41:24,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:41:23" (1/3) ... [2021-10-28 23:41:24,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b347eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:41:24, skipping insertion in model container [2021-10-28 23:41:24,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:41:23" (2/3) ... [2021-10-28 23:41:24,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b347eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:41:24, skipping insertion in model container [2021-10-28 23:41:24,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:41:24" (3/3) ... [2021-10-28 23:41:24,245 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn4f.c [2021-10-28 23:41:24,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:41:24,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:41:24,355 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:41:24,383 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-10-28 23:41:24,384 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:41:24,418 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) [2021-10-28 23:41:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:41:24,424 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:41:24,425 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:41:24,426 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:41:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:41:24,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-10-28 23:41:24,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:41:24,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384711334] [2021-10-28 23:41:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:41:24,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:41:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:41:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:41:24,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:41:24,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384711334] [2021-10-28 23:41:24,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384711334] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:41:24,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:41:24,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:41:24,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878833517] [2021-10-28 23:41:24,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:41:24,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:41:24,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:41:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:41:24,735 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) [2021-10-28 23:41:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:41:24,757 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-10-28 23:41:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:41:24,759 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 [2021-10-28 23:41:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:41:24,769 INFO L225 Difference]: With dead ends: 38 [2021-10-28 23:41:24,770 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 23:41:24,773 INFO L786 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 [2021-10-28 23:41:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 23:41:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-28 23:41:24,810 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) [2021-10-28 23:41:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-28 23:41:24,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-10-28 23:41:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:41:24,813 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-28 23:41:24,814 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) [2021-10-28 23:41:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-28 23:41:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:41:24,815 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:41:24,815 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:41:24,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:41:24,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:41:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:41:24,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-10-28 23:41:24,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:41:24,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764149248] [2021-10-28 23:41:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:41:24,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:41:24,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:41:24,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807329922] [2021-10-28 23:41:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:41:24,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:41:24,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:41:24,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:41:24,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:41:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:41:24,940 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:41:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:41:25,045 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:41:25,046 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:41:25,048 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:41:25,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:41:25,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:41:25,270 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-28 23:41:25,274 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:41:25,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:41:25 BoogieIcfgContainer [2021-10-28 23:41:25,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:41:25,307 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:41:25,307 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:41:25,307 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:41:25,308 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:41:24" (3/4) ... [2021-10-28 23:41:25,310 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:41:25,364 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27d472d3-27d8-440c-b8df-8753838cb5ae/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:41:25,364 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:41:25,366 INFO L168 Benchmark]: Toolchain (without parser) took 1864.26 ms. Allocated memory is still 102.8 MB. Free memory was 66.0 MB in the beginning and 74.1 MB in the end (delta: -8.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:41:25,367 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 102.8 MB. Free memory was 82.0 MB in the beginning and 82.0 MB in the end (delta: 68.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:41:25,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.38 ms. Allocated memory is still 102.8 MB. Free memory was 65.7 MB in the beginning and 77.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:41:25,369 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.13 ms. Allocated memory is still 102.8 MB. Free memory was 77.6 MB in the beginning and 76.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:41:25,369 INFO L168 Benchmark]: Boogie Preprocessor took 29.64 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 75.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:41:25,370 INFO L168 Benchmark]: RCFGBuilder took 328.56 ms. Allocated memory is still 102.8 MB. Free memory was 74.7 MB in the beginning and 64.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:41:25,371 INFO L168 Benchmark]: TraceAbstraction took 1070.07 ms. Allocated memory is still 102.8 MB. Free memory was 63.7 MB in the beginning and 76.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:41:25,372 INFO L168 Benchmark]: Witness Printer took 57.46 ms. Allocated memory is still 102.8 MB. Free memory was 76.2 MB in the beginning and 74.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:41:25,377 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 102.8 MB. Free memory was 82.0 MB in the beginning and 82.0 MB in the end (delta: 68.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.38 ms. Allocated memory is still 102.8 MB. Free memory was 65.7 MB in the beginning and 77.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.13 ms. Allocated memory is still 102.8 MB. Free memory was 77.6 MB in the beginning and 76.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.64 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 75.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 328.56 ms. Allocated memory is still 102.8 MB. Free memory was 74.7 MB in the beginning and 64.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1070.07 ms. Allocated memory is still 102.8 MB. Free memory was 63.7 MB in the beginning and 76.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. * Witness Printer took 57.46 ms. Allocated memory is still 102.8 MB. Free memory was 76.2 MB in the beginning and 74.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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] a[0] = 8 [L32] b[0] = 0 [L33] i=1 VAL [N=1] [L33] COND FALSE !(i