./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive-simple/id_b5_o10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_b5_o10-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2fbe8cf5b50674394627f719f6766631caa7190e ............................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 04:09:45,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 04:09:45,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 04:09:45,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 04:09:45,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 04:09:45,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 04:09:45,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 04:09:45,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 04:09:45,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 04:09:45,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 04:09:45,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 04:09:45,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 04:09:45,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 04:09:45,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 04:09:45,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 04:09:45,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 04:09:45,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 04:09:45,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 04:09:45,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 04:09:45,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 04:09:45,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 04:09:45,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 04:09:45,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 04:09:45,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 04:09:45,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 04:09:45,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 04:09:45,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 04:09:45,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 04:09:45,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 04:09:45,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 04:09:45,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 04:09:45,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 04:09:45,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 04:09:45,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 04:09:45,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 04:09:45,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 04:09:45,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 04:09:45,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 04:09:45,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 04:09:45,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 04:09:45,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 04:09:45,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-10-26 04:09:45,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 04:09:45,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 04:09:45,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 04:09:45,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 04:09:45,146 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 04:09:45,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 04:09:45,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 04:09:45,147 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 04:09:45,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 04:09:45,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 04:09:45,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 04:09:45,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 04:09:45,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 04:09:45,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 04:09:45,149 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-26 04:09:45,150 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 04:09:45,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 04:09:45,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 04:09:45,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 04:09:45,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 04:09:45,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 04:09:45,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 04:09:45,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 04:09:45,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 04:09:45,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 04:09:45,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 04:09:45,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 04:09:45,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 04:09:45,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 04:09:45,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 04:09:45,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 04:09:45,153 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fbe8cf5b50674394627f719f6766631caa7190e [2020-10-26 04:09:45,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 04:09:45,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 04:09:45,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 04:09:45,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 04:09:45,609 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 04:09:45,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b5_o10-1.c [2020-10-26 04:09:45,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c9889b88/2219ec13a2ce476fa330b0df0b4a35ba/FLAG5b8be0a8c [2020-10-26 04:09:46,297 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 04:09:46,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b5_o10-1.c [2020-10-26 04:09:46,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c9889b88/2219ec13a2ce476fa330b0df0b4a35ba/FLAG5b8be0a8c [2020-10-26 04:09:46,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c9889b88/2219ec13a2ce476fa330b0df0b4a35ba [2020-10-26 04:09:46,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 04:09:46,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 04:09:46,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 04:09:46,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 04:09:46,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 04:09:46,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:09:46" (1/1) ... [2020-10-26 04:09:46,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7a0c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:46, skipping insertion in model container [2020-10-26 04:09:46,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:09:46" (1/1) ... [2020-10-26 04:09:46,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 04:09:46,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 04:09:46,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:09:46,961 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 04:09:46,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:09:47,012 INFO L208 MainTranslator]: Completed translation [2020-10-26 04:09:47,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47 WrapperNode [2020-10-26 04:09:47,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 04:09:47,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 04:09:47,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 04:09:47,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 04:09:47,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 04:09:47,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 04:09:47,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 04:09:47,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 04:09:47,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... [2020-10-26 04:09:47,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 04:09:47,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 04:09:47,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 04:09:47,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 04:09:47,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 04:09:47,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 04:09:47,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 04:09:47,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 04:09:47,228 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-26 04:09:47,228 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-26 04:09:47,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 04:09:47,759 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 04:09:47,761 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-26 04:09:47,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:09:47 BoogieIcfgContainer [2020-10-26 04:09:47,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 04:09:47,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 04:09:47,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 04:09:47,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 04:09:47,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 04:09:46" (1/3) ... [2020-10-26 04:09:47,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d090132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 04:09:47, skipping insertion in model container [2020-10-26 04:09:47,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:09:47" (2/3) ... [2020-10-26 04:09:47,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d090132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 04:09:47, skipping insertion in model container [2020-10-26 04:09:47,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:09:47" (3/3) ... [2020-10-26 04:09:47,779 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b5_o10-1.c [2020-10-26 04:09:47,794 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 04:09:47,800 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-26 04:09:47,817 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-26 04:09:47,862 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 04:09:47,862 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 04:09:47,862 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 04:09:47,862 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 04:09:47,863 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 04:09:47,863 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 04:09:47,863 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 04:09:47,863 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 04:09:47,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-26 04:09:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-26 04:09:47,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 04:09:47,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-26 04:09:47,899 INFO L429 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-26 04:09:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:09:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 890470000, now seen corresponding path program 1 times [2020-10-26 04:09:47,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:09:47,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490491027] [2020-10-26 04:09:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:09:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:09:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:09:48,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490491027] [2020-10-26 04:09:48,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 04:09:48,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 04:09:48,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186929269] [2020-10-26 04:09:48,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 04:09:48,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:09:48,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 04:09:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 04:09:48,206 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-26 04:09:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:09:48,311 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-26 04:09:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 04:09:48,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-10-26 04:09:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 04:09:48,325 INFO L225 Difference]: With dead ends: 28 [2020-10-26 04:09:48,325 INFO L226 Difference]: Without dead ends: 17 [2020-10-26 04:09:48,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 04:09:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-26 04:09:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-26 04:09:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-26 04:09:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-26 04:09:48,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 6 [2020-10-26 04:09:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 04:09:48,382 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-26 04:09:48,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 04:09:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-26 04:09:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-26 04:09:48,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 04:09:48,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:09:48,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 04:09:48,384 INFO L429 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-26 04:09:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:09:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1834766279, now seen corresponding path program 1 times [2020-10-26 04:09:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:09:48,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142890535] [2020-10-26 04:09:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:09:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:09:48,415 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:09:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:09:48,448 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:09:48,476 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:09:48,476 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 04:09:48,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 04:09:48,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 04:09:48 BoogieIcfgContainer [2020-10-26 04:09:48,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 04:09:48,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 04:09:48,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 04:09:48,507 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 04:09:48,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:09:47" (3/4) ... [2020-10-26 04:09:48,510 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-26 04:09:48,551 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 04:09:48,551 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 04:09:48,554 INFO L168 Benchmark]: Toolchain (without parser) took 1904.79 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.1 MB in the beginning and 26.3 MB in the end (delta: 775.5 kB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2020-10-26 04:09:48,554 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 50.3 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:09:48,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.31 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 28.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-10-26 04:09:48,556 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.75 ms. Allocated memory is still 50.3 MB. Free memory was 28.8 MB in the beginning and 27.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:09:48,557 INFO L168 Benchmark]: Boogie Preprocessor took 47.05 ms. Allocated memory is still 50.3 MB. Free memory was 27.5 MB in the beginning and 26.5 MB in the end (delta: 995.2 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-26 04:09:48,558 INFO L168 Benchmark]: RCFGBuilder took 643.04 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.5 MB in the beginning and 38.6 MB in the end (delta: -12.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-10-26 04:09:48,559 INFO L168 Benchmark]: TraceAbstraction took 736.34 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 28.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-10-26 04:09:48,560 INFO L168 Benchmark]: Witness Printer took 44.57 ms. Allocated memory is still 60.8 MB. Free memory was 28.1 MB in the beginning and 26.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:09:48,564 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 50.3 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 359.31 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 28.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.75 ms. Allocated memory is still 50.3 MB. Free memory was 28.8 MB in the beginning and 27.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.05 ms. Allocated memory is still 50.3 MB. Free memory was 27.5 MB in the beginning and 26.5 MB in the end (delta: 995.2 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 643.04 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.5 MB in the beginning and 38.6 MB in the end (delta: -12.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 736.34 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 28.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Witness Printer took 44.57 ms. Allocated memory is still 60.8 MB. Free memory was 28.1 MB in the beginning and 26.3 MB in the end (delta: 1.8 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: 8]: integer overflow possible integer overflow possible We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL id(input) VAL [\old(x)=-2147483648] [L7] COND FALSE !(x==0) VAL [\old(x)=-2147483648, x=-2147483648] [L8] x-1 VAL [\old(x)=-2147483648, x=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 31 SDslu, 25 SDs, 0 SdLazy, 19 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 65 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...