./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4liff.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_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s4liff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/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 0971d3f4e504a4d4e0b12e06b99b350fdf7a353d ............................................................................................................................................................................................................................................................................................................................................................ 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 [2020-11-29 21:27:49,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:27:49,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:27:49,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:27:49,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:27:49,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:27:49,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:27:49,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:27:49,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:27:49,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:27:49,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:27:49,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:27:49,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:27:49,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:27:49,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:27:49,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:27:49,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:27:49,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:27:49,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:27:49,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:27:49,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:27:49,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:27:49,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:27:49,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:27:49,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:27:49,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:27:49,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:27:49,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:27:49,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:27:49,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:27:49,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:27:50,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:27:50,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:27:50,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:27:50,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:27:50,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:27:50,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:27:50,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:27:50,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:27:50,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:27:50,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:27:50,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:27:50,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:27:50,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:27:50,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:27:50,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:27:50,032 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:27:50,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:27:50,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:27:50,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:27:50,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:27:50,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:27:50,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:27:50,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:27:50,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:27:50,035 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:27:50,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:27:50,035 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:27:50,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:27:50,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:27:50,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:27:50,036 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:27:50,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:27:50,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:27:50,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:27:50,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:27:50,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:27:50,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:27:50,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:27:50,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:27:50,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:27:50,038 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_41680946-b423-4fad-9103-f677ced52d56/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0971d3f4e504a4d4e0b12e06b99b350fdf7a353d [2020-11-29 21:27:50,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:27:50,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:27:50,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:27:50,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:27:50,354 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:27:50,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s4liff.c [2020-11-29 21:27:50,424 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/data/084c0d471/947d1bb1ed1b48dc9d9874eab9f71147/FLAG8115c9a5a [2020-11-29 21:27:50,806 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:27:50,806 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/sv-benchmarks/c/array-fpi/s4liff.c [2020-11-29 21:27:50,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/data/084c0d471/947d1bb1ed1b48dc9d9874eab9f71147/FLAG8115c9a5a [2020-11-29 21:27:51,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/data/084c0d471/947d1bb1ed1b48dc9d9874eab9f71147 [2020-11-29 21:27:51,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:27:51,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:27:51,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:27:51,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:27:51,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:27:51,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f59484d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51, skipping insertion in model container [2020-11-29 21:27:51,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:27:51,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:27:51,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:27:51,459 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:27:51,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:27:51,524 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:27:51,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51 WrapperNode [2020-11-29 21:27:51,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:27:51,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:27:51,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:27:51,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:27:51,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:27:51,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:27:51,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:27:51,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:27:51,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... [2020-11-29 21:27:51,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:27:51,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:27:51,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:27:51,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:27:51,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/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 [2020-11-29 21:27:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:27:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:27:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 21:27:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 21:27:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:27:51,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:27:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 21:27:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 21:27:52,025 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:27:52,026 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 21:27:52,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:27:52 BoogieIcfgContainer [2020-11-29 21:27:52,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:27:52,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:27:52,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:27:52,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:27:52,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:27:51" (1/3) ... [2020-11-29 21:27:52,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dd23e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:27:52, skipping insertion in model container [2020-11-29 21:27:52,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:27:51" (2/3) ... [2020-11-29 21:27:52,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dd23e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:27:52, skipping insertion in model container [2020-11-29 21:27:52,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:27:52" (3/3) ... [2020-11-29 21:27:52,036 INFO L111 eAbstractionObserver]: Analyzing ICFG s4liff.c [2020-11-29 21:27:52,070 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:27:52,074 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:27:52,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:27:52,120 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:27:52,120 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:27:52,120 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:27:52,120 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:27:52,121 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:27:52,121 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:27:52,121 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:27:52,121 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:27:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-29 21:27:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 21:27:52,138 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:27:52,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:27:52,139 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:27:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:27:52,143 INFO L82 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2020-11-29 21:27:52,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:27:52,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175841999] [2020-11-29 21:27:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:27:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:27:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:27:52,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175841999] [2020-11-29 21:27:52,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:27:52,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:27:52,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890877492] [2020-11-29 21:27:52,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:27:52,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:27:52,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:27:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:27:52,294 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-11-29 21:27:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:27:52,310 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2020-11-29 21:27:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:27:52,311 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-29 21:27:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:27:52,317 INFO L225 Difference]: With dead ends: 41 [2020-11-29 21:27:52,318 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 21:27:52,321 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 [2020-11-29 21:27:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 21:27:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 21:27:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 21:27:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-29 21:27:52,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2020-11-29 21:27:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:27:52,351 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-29 21:27:52,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:27:52,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-29 21:27:52,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 21:27:52,352 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:27:52,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:27:52,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:27:52,352 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:27:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:27:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2020-11-29 21:27:52,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:27:52,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423404828] [2020-11-29 21:27:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:27:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:27:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:27:52,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423404828] [2020-11-29 21:27:52,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:27:52,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 21:27:52,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930676451] [2020-11-29 21:27:52,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:27:52,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:27:52,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:27:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:27:52,450 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-11-29 21:27:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:27:52,555 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-11-29 21:27:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:27:52,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 21:27:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:27:52,557 INFO L225 Difference]: With dead ends: 36 [2020-11-29 21:27:52,557 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 21:27:52,558 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 [2020-11-29 21:27:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 21:27:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-11-29 21:27:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 21:27:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-29 21:27:52,563 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2020-11-29 21:27:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:27:52,563 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-29 21:27:52,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:27:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-29 21:27:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 21:27:52,565 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:27:52,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:27:52,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:27:52,565 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:27:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:27:52,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2020-11-29 21:27:52,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:27:52,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656817649] [2020-11-29 21:27:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:27:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:27:52,647 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:27:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:27:52,724 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:27:52,748 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:27:52,748 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:27:52,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 21:27:52,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:27:52 BoogieIcfgContainer [2020-11-29 21:27:52,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:27:52,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:27:52,789 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:27:52,789 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:27:52,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:27:52" (3/4) ... [2020-11-29 21:27:52,794 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 21:27:52,845 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_41680946-b423-4fad-9103-f677ced52d56/bin/uautomizer/witness.graphml [2020-11-29 21:27:52,846 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:27:52,847 INFO L168 Benchmark]: Toolchain (without parser) took 1614.55 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 69.7 MB in the beginning and 50.1 MB in the end (delta: 19.6 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. [2020-11-29 21:27:52,848 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 67.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:27:52,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.41 ms. Allocated memory is still 90.2 MB. Free memory was 69.5 MB in the beginning and 66.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:27:52,849 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.90 ms. Allocated memory is still 90.2 MB. Free memory was 66.8 MB in the beginning and 65.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:27:52,850 INFO L168 Benchmark]: Boogie Preprocessor took 42.49 ms. Allocated memory is still 90.2 MB. Free memory was 65.2 MB in the beginning and 63.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:27:52,850 INFO L168 Benchmark]: RCFGBuilder took 399.45 ms. Allocated memory is still 90.2 MB. Free memory was 63.9 MB in the beginning and 48.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 21:27:52,851 INFO L168 Benchmark]: TraceAbstraction took 759.36 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 48.5 MB in the beginning and 52.7 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2020-11-29 21:27:52,852 INFO L168 Benchmark]: Witness Printer took 56.65 ms. Allocated memory is still 109.1 MB. Free memory was 52.7 MB in the beginning and 50.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:27:52,855 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 67.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.41 ms. Allocated memory is still 90.2 MB. Free memory was 69.5 MB in the beginning and 66.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.90 ms. Allocated memory is still 90.2 MB. Free memory was 66.8 MB in the beginning and 65.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.49 ms. Allocated memory is still 90.2 MB. Free memory was 65.2 MB in the beginning and 63.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 399.45 ms. Allocated memory is still 90.2 MB. Free memory was 63.9 MB in the beginning and 48.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 759.36 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 48.5 MB in the beginning and 52.7 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * Witness Printer took 56.65 ms. Allocated memory is still 109.1 MB. Free memory was 52.7 MB in the beginning and 50.1 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 sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = N [L32] i=0 VAL [N=1] [L32] COND TRUE i