./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn5f.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_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn5f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/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 9a6037c76b46b0da4af31997de1947f2fadc4b09 .......................................................................................................................................................................................................................................................................................................................................................... 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 03:20:54,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:20:54,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:20:54,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:20:54,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:20:54,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:20:54,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:20:54,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:20:54,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:20:54,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:20:54,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:20:54,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:20:54,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:20:54,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:20:54,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:20:54,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:20:54,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:20:54,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:20:54,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:20:54,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:20:54,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:20:54,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:20:54,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:20:54,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:20:54,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:20:54,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:20:54,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:20:54,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:20:54,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:20:54,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:20:54,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:20:54,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:20:54,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:20:54,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:20:54,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:20:54,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:20:54,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:20:54,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:20:54,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:20:54,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:20:54,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:20:54,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:20:54,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:20:54,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:20:54,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:20:54,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:20:54,307 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:20:54,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:20:54,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:20:54,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:20:54,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:20:54,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:20:54,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:20:54,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:20:54,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:20:54,309 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:20:54,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:20:54,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:20:54,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:20:54,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:20:54,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:20:54,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:20:54,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:20:54,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:20:54,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:20:54,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:20:54,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:20:54,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:20:54,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:20:54,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:20:54,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:20:54,312 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_16af8f2e-6d81-46bd-9020-38f1828c63a9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a6037c76b46b0da4af31997de1947f2fadc4b09 [2020-11-28 03:20:54,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:20:54,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:20:54,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:20:54,678 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:20:54,687 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:20:54,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ifeqn5f.c [2020-11-28 03:20:54,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/data/5a6af74bf/218d3387633347a19082c0da8f2611e1/FLAGb436f498e [2020-11-28 03:20:55,214 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:20:55,215 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/sv-benchmarks/c/array-fpi/ifeqn5f.c [2020-11-28 03:20:55,223 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/data/5a6af74bf/218d3387633347a19082c0da8f2611e1/FLAGb436f498e [2020-11-28 03:20:55,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/data/5a6af74bf/218d3387633347a19082c0da8f2611e1 [2020-11-28 03:20:55,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:20:55,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:20:55,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:20:55,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:20:55,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:20:55,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:55,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd8acc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55, skipping insertion in model container [2020-11-28 03:20:55,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:55,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:20:55,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:20:55,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:20:55,844 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:20:55,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:20:55,906 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:20:55,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55 WrapperNode [2020-11-28 03:20:55,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:20:55,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:20:55,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:20:55,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:20:55,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:55,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:55,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:20:55,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:20:55,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:20:55,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:20:55,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:55,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:55,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:55,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:56,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:56,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:56,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... [2020-11-28 03:20:56,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:20:56,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:20:56,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:20:56,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:20:56,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/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 03:20:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:20:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:20:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:20:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:20:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:20:56,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:20:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:20:56,663 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:20:56,663 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 03:20:56,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:56 BoogieIcfgContainer [2020-11-28 03:20:56,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:20:56,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:20:56,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:20:56,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:20:56,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:20:55" (1/3) ... [2020-11-28 03:20:56,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c541c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:20:56, skipping insertion in model container [2020-11-28 03:20:56,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:55" (2/3) ... [2020-11-28 03:20:56,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c541c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:20:56, skipping insertion in model container [2020-11-28 03:20:56,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:56" (3/3) ... [2020-11-28 03:20:56,679 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn5f.c [2020-11-28 03:20:56,693 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:20:56,698 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:20:56,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:20:56,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:20:56,749 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:20:56,749 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:20:56,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:20:56,749 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:20:56,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:20:56,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:20:56,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:20:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-28 03:20:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:20:56,772 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:56,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:56,773 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:20:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:56,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-11-28 03:20:56,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:56,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130250580] [2020-11-28 03:20:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:56,978 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 03:20:56,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130250580] [2020-11-28 03:20:56,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:56,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:20:56,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432631036] [2020-11-28 03:20:56,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:20:56,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:57,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:20:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:20:57,003 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-28 03:20:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:57,025 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-11-28 03:20:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:20:57,027 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-28 03:20:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:57,038 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:20:57,038 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:20:57,042 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 03:20:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:20:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 03:20:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:20:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-11-28 03:20:57,094 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-11-28 03:20:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:57,104 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-11-28 03:20:57,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:20:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-11-28 03:20:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:20:57,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:57,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:57,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:20:57,106 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:20:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:57,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-11-28 03:20:57,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:57,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128450245] [2020-11-28 03:20:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:57,231 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 03:20:57,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128450245] [2020-11-28 03:20:57,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:57,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784496514] [2020-11-28 03:20:57,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:57,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:57,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:57,235 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-11-28 03:20:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:57,358 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-11-28 03:20:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:57,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 03:20:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:57,361 INFO L225 Difference]: With dead ends: 45 [2020-11-28 03:20:57,361 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 03:20:57,362 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 03:20:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 03:20:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-28 03:20:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:20:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-28 03:20:57,370 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-11-28 03:20:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:57,370 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-28 03:20:57,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-28 03:20:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:20:57,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:57,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:57,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:20:57,372 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:20:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-11-28 03:20:57,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:57,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636407120] [2020-11-28 03:20:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:57,401 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:20:57,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624978469] [2020-11-28 03:20:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:57,503 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:57,542 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:57,582 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:57,582 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:20:57,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:20:57,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:20:57 BoogieIcfgContainer [2020-11-28 03:20:57,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:20:57,842 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:20:57,842 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:20:57,842 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:20:57,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:56" (3/4) ... [2020-11-28 03:20:57,845 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:20:57,892 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_16af8f2e-6d81-46bd-9020-38f1828c63a9/bin/uautomizer/witness.graphml [2020-11-28 03:20:57,892 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:20:57,894 INFO L168 Benchmark]: Toolchain (without parser) took 2302.24 ms. Allocated memory is still 86.0 MB. Free memory was 53.8 MB in the beginning and 35.5 MB in the end (delta: 18.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:57,895 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 61.6 MB in the beginning and 61.6 MB in the end (delta: 28.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:20:57,895 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.94 ms. Allocated memory is still 86.0 MB. Free memory was 53.6 MB in the beginning and 63.9 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:57,896 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.80 ms. Allocated memory is still 86.0 MB. Free memory was 63.9 MB in the beginning and 62.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:57,897 INFO L168 Benchmark]: Boogie Preprocessor took 59.33 ms. Allocated memory is still 86.0 MB. Free memory was 62.2 MB in the beginning and 61.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:57,898 INFO L168 Benchmark]: RCFGBuilder took 633.71 ms. Allocated memory is still 86.0 MB. Free memory was 61.2 MB in the beginning and 46.0 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:57,898 INFO L168 Benchmark]: TraceAbstraction took 1170.86 ms. Allocated memory is still 86.0 MB. Free memory was 45.5 MB in the beginning and 38.2 MB in the end (delta: 7.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:57,899 INFO L168 Benchmark]: Witness Printer took 50.16 ms. Allocated memory is still 86.0 MB. Free memory was 38.2 MB in the beginning and 35.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:57,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 61.6 MB in the beginning and 61.6 MB in the end (delta: 28.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 314.94 ms. Allocated memory is still 86.0 MB. Free memory was 53.6 MB in the beginning and 63.9 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.80 ms. Allocated memory is still 86.0 MB. Free memory was 63.9 MB in the beginning and 62.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.33 ms. Allocated memory is still 86.0 MB. Free memory was 62.2 MB in the beginning and 61.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 633.71 ms. Allocated memory is still 86.0 MB. Free memory was 61.2 MB in the beginning and 46.0 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1170.86 ms. Allocated memory is still 86.0 MB. Free memory was 45.5 MB in the beginning and 38.2 MB in the end (delta: 7.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. * Witness Printer took 50.16 ms. Allocated memory is still 86.0 MB. Free memory was 38.2 MB in the beginning and 35.5 MB in the end (delta: 2.6 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] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i