./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res2of.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res2of.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ab5f5575b4f404d180fabd8e1f95043fb9254d7e ......................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:26:40,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:40,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:40,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:40,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:40,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:40,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:40,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:40,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:40,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:40,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:40,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:40,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:40,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:40,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:40,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:40,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:40,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:40,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:40,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:40,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:40,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:40,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:40,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:40,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:40,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:40,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:40,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:40,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:40,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:40,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:40,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:40,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:40,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:40,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:40,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:40,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:40,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:40,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:40,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:40,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:40,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:26:40,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:40,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:40,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:40,208 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:40,209 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:40,209 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:40,209 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:40,210 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:40,217 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:40,218 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:40,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:40,219 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:40,220 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:40,220 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:40,220 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:40,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:40,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:40,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:40,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:40,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:40,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:40,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:40,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:40,224 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:40,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:40,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:40,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:40,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:40,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:40,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:40,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:40,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:40,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:40,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:40,230 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:40,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:40,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:40,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:40,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:40,232 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab5f5575b4f404d180fabd8e1f95043fb9254d7e [2021-10-11 02:26:40,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:40,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:40,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:40,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:40,636 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:40,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/res2of.c [2021-10-11 02:26:40,719 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/data/1373e746e/b10bf9227dfd48ba92421edfa8008b6c/FLAG218a2817f [2021-10-11 02:26:41,236 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:41,237 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/sv-benchmarks/c/array-fpi/res2of.c [2021-10-11 02:26:41,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/data/1373e746e/b10bf9227dfd48ba92421edfa8008b6c/FLAG218a2817f [2021-10-11 02:26:41,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/data/1373e746e/b10bf9227dfd48ba92421edfa8008b6c [2021-10-11 02:26:41,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:41,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:41,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:41,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:41,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:41,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b84afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:41, skipping insertion in model container [2021-10-11 02:26:41,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:41" (1/1) ... [2021-10-11 02:26:41,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:41,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:41,877 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/sv-benchmarks/c/array-fpi/res2of.c[589,602] [2021-10-11 02:26:41,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:41,933 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:41,952 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/sv-benchmarks/c/array-fpi/res2of.c[589,602] [2021-10-11 02:26:41,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:42,016 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:42,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42 WrapperNode [2021-10-11 02:26:42,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:42,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:42,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:42,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:42,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:42,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:42,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:42,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:42,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... [2021-10-11 02:26:42,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:42,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:42,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:42,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:42,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:26:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:42,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:42,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:26:42,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:26:43,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:43,081 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-11 02:26:43,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:43 BoogieIcfgContainer [2021-10-11 02:26:43,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:43,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:43,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:43,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:43,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:41" (1/3) ... [2021-10-11 02:26:43,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b782ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:43, skipping insertion in model container [2021-10-11 02:26:43,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:42" (2/3) ... [2021-10-11 02:26:43,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b782ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:43, skipping insertion in model container [2021-10-11 02:26:43,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:43" (3/3) ... [2021-10-11 02:26:43,094 INFO L111 eAbstractionObserver]: Analyzing ICFG res2of.c [2021-10-11 02:26:43,114 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:43,118 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:43,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:43,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:43,153 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:43,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:43,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:43,153 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:43,153 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:43,153 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:43,154 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-10-11 02:26:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:26:43,174 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:43,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:43,175 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:43,181 INFO L82 PathProgramCache]: Analyzing trace with hash -121576232, now seen corresponding path program 1 times [2021-10-11 02:26:43,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:43,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499204392] [2021-10-11 02:26:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:43,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499204392] [2021-10-11 02:26:43,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:43,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:43,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326353645] [2021-10-11 02:26:43,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:43,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:43,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:43,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:43,415 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2021-10-11 02:26:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:43,476 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2021-10-11 02:26:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:43,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-10-11 02:26:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:43,487 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:26:43,487 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:26:43,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:26:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 02:26:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:26:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-10-11 02:26:43,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2021-10-11 02:26:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:43,528 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-10-11 02:26:43,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2021-10-11 02:26:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:26:43,529 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:43,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:43,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:43,530 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1625940306, now seen corresponding path program 1 times [2021-10-11 02:26:43,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:43,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131846875] [2021-10-11 02:26:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:26:43,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131846875] [2021-10-11 02:26:43,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:43,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:43,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845887773] [2021-10-11 02:26:43,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:43,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:43,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:43,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:43,605 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand 4 states. [2021-10-11 02:26:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:43,664 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2021-10-11 02:26:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:43,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:26:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:43,666 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:26:43,666 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:26:43,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:26:43,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-11 02:26:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:26:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-10-11 02:26:43,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2021-10-11 02:26:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:43,672 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-10-11 02:26:43,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-10-11 02:26:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:26:43,673 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:43,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:43,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:43,674 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:43,675 INFO L82 PathProgramCache]: Analyzing trace with hash -984404389, now seen corresponding path program 1 times [2021-10-11 02:26:43,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:43,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44435139] [2021-10-11 02:26:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:43,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:43,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:43,919 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:26:43,919 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:43,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:43,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:43 BoogieIcfgContainer [2021-10-11 02:26:44,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:44,000 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:44,001 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:44,001 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:44,001 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:43" (3/4) ... [2021-10-11 02:26:44,007 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:26:44,086 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f07e82-0d88-416b-a006-00b108962f38/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:44,086 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:44,088 INFO L168 Benchmark]: Toolchain (without parser) took 2460.53 ms. Allocated memory was 104.9 MB in the beginning and 132.1 MB in the end (delta: 27.3 MB). Free memory was 74.6 MB in the beginning and 96.9 MB in the end (delta: -22.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:44,089 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 104.9 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:44,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.06 ms. Allocated memory is still 104.9 MB. Free memory was 74.4 MB in the beginning and 78.9 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:44,090 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.72 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 77.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:44,090 INFO L168 Benchmark]: Boogie Preprocessor took 46.00 ms. Allocated memory is still 104.9 MB. Free memory was 77.1 MB in the beginning and 75.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:44,097 INFO L168 Benchmark]: RCFGBuilder took 958.91 ms. Allocated memory was 104.9 MB in the beginning and 132.1 MB in the end (delta: 27.3 MB). Free memory was 75.7 MB in the beginning and 103.7 MB in the end (delta: -28.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:44,098 INFO L168 Benchmark]: TraceAbstraction took 913.68 ms. Allocated memory is still 132.1 MB. Free memory was 103.0 MB in the beginning and 100.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:44,101 INFO L168 Benchmark]: Witness Printer took 86.05 ms. Allocated memory is still 132.1 MB. Free memory was 100.1 MB in the beginning and 96.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:44,104 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 104.9 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 391.06 ms. Allocated memory is still 104.9 MB. Free memory was 74.4 MB in the beginning and 78.9 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.72 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 77.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.00 ms. Allocated memory is still 104.9 MB. Free memory was 77.1 MB in the beginning and 75.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 958.91 ms. Allocated memory was 104.9 MB in the beginning and 132.1 MB in the end (delta: 27.3 MB). Free memory was 75.7 MB in the beginning and 103.7 MB in the end (delta: -28.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 913.68 ms. Allocated memory is still 132.1 MB. Free memory was 103.0 MB in the beginning and 100.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Witness Printer took 86.05 ms. Allocated memory is still 132.1 MB. Free memory was 100.1 MB in the beginning and 96.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L30] int *b = malloc(sizeof(int)*N); [L31] int *c = malloc(sizeof(int)*N); [L33] sum[0] = 0 [L34] i=0 VAL [N=1] [L34] COND TRUE i