./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ms2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ms2f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer --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 ab1941c3f1e3ccfc453cc61b57def578295cf9b5 ................................................................................................................................................................................................................................................................................................................................................ 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-a4ecdab [2020-11-28 03:08:18,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:08:18,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:08:19,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:08:19,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:08:19,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:08:19,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:08:19,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:08:19,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:08:19,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:08:19,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:08:19,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:08:19,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:08:19,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:08:19,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:08:19,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:08:19,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:08:19,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:08:19,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:08:19,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:08:19,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:08:19,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:08:19,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:08:19,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:08:19,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:08:19,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:08:19,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:08:19,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:08:19,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:08:19,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:08:19,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:08:19,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:08:19,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:08:19,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:08:19,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:08:19,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:08:19,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:08:19,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:08:19,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:08:19,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:08:19,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:08:19,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:08:19,219 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:08:19,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:08:19,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:08:19,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:08:19,221 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:08:19,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:08:19,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:08:19,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:08:19,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:08:19,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:08:19,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:08:19,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:08:19,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:08:19,224 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:08:19,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:08:19,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:08:19,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:08:19,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:08:19,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:08:19,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:08:19,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:08:19,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:08:19,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:08:19,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:08:19,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:08:19,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:08:19,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:08:19,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:08:19,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:08:19,228 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-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab1941c3f1e3ccfc453cc61b57def578295cf9b5 [2020-11-28 03:08:19,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:08:19,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:08:19,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:08:19,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:08:19,626 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:08:19,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ms2f.c [2020-11-28 03:08:19,729 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/data/8fbcd371e/e299dd5c98354b14b754dc3a95698213/FLAGd929fd20e [2020-11-28 03:08:20,277 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:08:20,278 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/sv-benchmarks/c/array-fpi/ms2f.c [2020-11-28 03:08:20,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/data/8fbcd371e/e299dd5c98354b14b754dc3a95698213/FLAGd929fd20e [2020-11-28 03:08:20,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/data/8fbcd371e/e299dd5c98354b14b754dc3a95698213 [2020-11-28 03:08:20,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:08:20,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:08:20,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:08:20,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:08:20,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:08:20,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:20,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3e2b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20, skipping insertion in model container [2020-11-28 03:08:20,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:20,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:08:20,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:08:20,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:08:20,905 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:08:20,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:08:20,983 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:08:20,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20 WrapperNode [2020-11-28 03:08:20,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:08:20,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:08:20,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:08:20,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:08:20,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:08:21,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:08:21,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:08:21,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:08:21,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... [2020-11-28 03:08:21,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:08:21,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:08:21,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:08:21,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:08:21,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:08:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:08:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:08:21,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:08:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:08:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:08:21,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:08:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:08:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:08:21,523 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:08:21,523 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 03:08:21,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:21 BoogieIcfgContainer [2020-11-28 03:08:21,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:08:21,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:08:21,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:08:21,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:08:21,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:08:20" (1/3) ... [2020-11-28 03:08:21,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f0409f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:08:21, skipping insertion in model container [2020-11-28 03:08:21,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:20" (2/3) ... [2020-11-28 03:08:21,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f0409f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:08:21, skipping insertion in model container [2020-11-28 03:08:21,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:21" (3/3) ... [2020-11-28 03:08:21,536 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2f.c [2020-11-28 03:08:21,548 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:08:21,554 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:08:21,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:08:21,629 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:08:21,629 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:08:21,630 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:08:21,630 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:08:21,630 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:08:21,630 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:08:21,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:08:21,631 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:08:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-28 03:08:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:08:21,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:21,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:21,653 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:08:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-11-28 03:08:21,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:21,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255260840] [2020-11-28 03:08:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:21,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255260840] [2020-11-28 03:08:21,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:08:21,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:08:21,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835214614] [2020-11-28 03:08:21,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:08:21,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:08:21,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:08:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:08:21,872 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-11-28 03:08:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:08:21,892 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-11-28 03:08:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:08:21,894 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-28 03:08:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:08:21,905 INFO L225 Difference]: With dead ends: 35 [2020-11-28 03:08:21,905 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 03:08:21,912 INFO L677 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 [2020-11-28 03:08:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 03:08:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 03:08:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 03:08:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-28 03:08:21,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-11-28 03:08:21,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:08:21,963 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-28 03:08:21,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:08:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-28 03:08:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:08:21,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:21,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:21,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:08:21,966 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:08:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:21,970 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-11-28 03:08:21,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:21,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017215492] [2020-11-28 03:08:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:22,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017215492] [2020-11-28 03:08:22,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:08:22,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:08:22,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472314663] [2020-11-28 03:08:22,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:08:22,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:08:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:08:22,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:08:22,157 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-28 03:08:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:08:22,263 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-11-28 03:08:22,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:08:22,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:08:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:08:22,267 INFO L225 Difference]: With dead ends: 28 [2020-11-28 03:08:22,267 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 03:08:22,268 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 [2020-11-28 03:08:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 03:08:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-28 03:08:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 03:08:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-28 03:08:22,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-11-28 03:08:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:08:22,275 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-28 03:08:22,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:08:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-28 03:08:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:08:22,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:22,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:22,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:08:22,279 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:08:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:22,280 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-11-28 03:08:22,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:22,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859509513] [2020-11-28 03:08:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:08:22,339 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:08:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:08:22,425 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:08:22,457 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:08:22,458 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:08:22,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:08:22,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:08:22 BoogieIcfgContainer [2020-11-28 03:08:22,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:08:22,504 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:08:22,504 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:08:22,506 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:08:22,507 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:21" (3/4) ... [2020-11-28 03:08:22,511 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:08:22,602 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_843c703c-3986-4be7-9bd1-38d32096c4a7/bin/uautomizer/witness.graphml [2020-11-28 03:08:22,603 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:08:22,605 INFO L168 Benchmark]: Toolchain (without parser) took 1999.61 ms. Allocated memory was 117.4 MB in the beginning and 155.2 MB in the end (delta: 37.7 MB). Free memory was 94.5 MB in the beginning and 117.3 MB in the end (delta: -22.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:22,606 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 117.4 MB. Free memory was 76.3 MB in the beginning and 76.2 MB in the end (delta: 61.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:22,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.15 ms. Allocated memory is still 117.4 MB. Free memory was 94.5 MB in the beginning and 93.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:22,608 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.84 ms. Allocated memory is still 117.4 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:22,610 INFO L168 Benchmark]: Boogie Preprocessor took 60.37 ms. Allocated memory is still 117.4 MB. Free memory was 92.0 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:22,611 INFO L168 Benchmark]: RCFGBuilder took 401.07 ms. Allocated memory is still 117.4 MB. Free memory was 90.7 MB in the beginning and 76.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:22,612 INFO L168 Benchmark]: TraceAbstraction took 976.09 ms. Allocated memory was 117.4 MB in the beginning and 155.2 MB in the end (delta: 37.7 MB). Free memory was 76.0 MB in the beginning and 119.4 MB in the end (delta: -43.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:22,613 INFO L168 Benchmark]: Witness Printer took 99.06 ms. Allocated memory is still 155.2 MB. Free memory was 119.4 MB in the beginning and 117.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:22,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 117.4 MB. Free memory was 76.3 MB in the beginning and 76.2 MB in the end (delta: 61.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.15 ms. Allocated memory is still 117.4 MB. Free memory was 94.5 MB in the beginning and 93.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.84 ms. Allocated memory is still 117.4 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.37 ms. Allocated memory is still 117.4 MB. Free memory was 92.0 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 401.07 ms. Allocated memory is still 117.4 MB. Free memory was 90.7 MB in the beginning and 76.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 976.09 ms. Allocated memory was 117.4 MB in the beginning and 155.2 MB in the end (delta: 37.7 MB). Free memory was 76.0 MB in the beginning and 119.4 MB in the end (delta: -43.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 99.06 ms. Allocated memory is still 155.2 MB. Free memory was 119.4 MB in the beginning and 117.3 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: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i