./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer --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 80e52f65dba85ecdcfa89dcdd215c6def71ea4a3 ............................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-29 18:58:37,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:58:37,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:58:37,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:58:37,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:58:37,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:58:37,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:58:37,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:58:37,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:58:37,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:58:37,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:58:37,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:58:37,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:58:37,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:58:37,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:58:37,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:58:37,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:58:37,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:58:37,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:58:37,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:58:37,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:58:37,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:58:37,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:58:37,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:58:37,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:58:37,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:58:37,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:58:37,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:58:37,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:58:37,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:58:37,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:58:37,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:58:37,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:58:37,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:58:37,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:58:37,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:58:37,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:58:37,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:58:37,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:58:37,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:58:37,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:58:37,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-11-29 18:58:37,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:58:37,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:58:37,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:58:37,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:58:37,309 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:58:37,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:58:37,310 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:58:37,310 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 18:58:37,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:58:37,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:58:37,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:58:37,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:58:37,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:58:37,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:58:37,312 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-29 18:58:37,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:58:37,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:58:37,313 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:58:37,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:58:37,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:58:37,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:58:37,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:58:37,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:58:37,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:58:37,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:58:37,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:58:37,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:58:37,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:58:37,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:58:37,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:58:37,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:58:37,317 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_3cdbae26-5e19-4e21-9183-16b315131cf9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80e52f65dba85ecdcfa89dcdd215c6def71ea4a3 [2020-11-29 18:58:37,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:58:37,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:58:37,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:58:37,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:58:37,657 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:58:37,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b3_o5-1.c [2020-11-29 18:58:37,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/data/ae0b475f6/03a010c14e854e9480ebbc7be3273a25/FLAG09ee8edd1 [2020-11-29 18:58:38,286 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:58:38,287 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/sv-benchmarks/c/recursive-simple/id_b3_o5-1.c [2020-11-29 18:58:38,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/data/ae0b475f6/03a010c14e854e9480ebbc7be3273a25/FLAG09ee8edd1 [2020-11-29 18:58:38,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/data/ae0b475f6/03a010c14e854e9480ebbc7be3273a25 [2020-11-29 18:58:38,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:58:38,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:58:38,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:58:38,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:58:38,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:58:38,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:38,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bfefeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38, skipping insertion in model container [2020-11-29 18:58:38,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:38,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:58:38,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:58:38,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:58:38,928 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:58:38,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:58:38,964 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:58:38,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38 WrapperNode [2020-11-29 18:58:38,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:58:38,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:58:38,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:58:38,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:58:38,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:38,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:39,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:58:39,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:58:39,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:58:39,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:58:39,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:39,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:39,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:39,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:39,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:39,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:39,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... [2020-11-29 18:58:39,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:58:39,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:58:39,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:58:39,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:58:39,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/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 18:58:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:58:39,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:58:39,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:58:39,144 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-29 18:58:39,145 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-29 18:58:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:58:39,560 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:58:39,560 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 18:58:39,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:58:39 BoogieIcfgContainer [2020-11-29 18:58:39,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:58:39,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:58:39,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:58:39,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:58:39,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:58:38" (1/3) ... [2020-11-29 18:58:39,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292c0877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:58:39, skipping insertion in model container [2020-11-29 18:58:39,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:38" (2/3) ... [2020-11-29 18:58:39,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292c0877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:58:39, skipping insertion in model container [2020-11-29 18:58:39,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:58:39" (3/3) ... [2020-11-29 18:58:39,585 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o5-1.c [2020-11-29 18:58:39,595 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:58:39,600 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-29 18:58:39,613 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-29 18:58:39,641 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:58:39,641 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:58:39,642 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:58:39,642 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:58:39,642 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:58:39,642 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:58:39,642 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:58:39,643 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:58:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-29 18:58:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 18:58:39,669 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:58:39,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 18:58:39,670 INFO L429 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 18:58:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:58:39,678 INFO L82 PathProgramCache]: Analyzing trace with hash 890470000, now seen corresponding path program 1 times [2020-11-29 18:58:39,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:58:39,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88043784] [2020-11-29 18:58:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:58:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:58:39,937 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 18:58:39,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88043784] [2020-11-29 18:58:39,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:58:39,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:58:39,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703204788] [2020-11-29 18:58:39,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:58:39,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:58:39,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:58:39,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:58:39,975 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-11-29 18:58:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:58:40,099 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-29 18:58:40,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:58:40,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-29 18:58:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:58:40,110 INFO L225 Difference]: With dead ends: 28 [2020-11-29 18:58:40,111 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 18:58:40,115 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 [2020-11-29 18:58:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 18:58:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 18:58:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 18:58:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-29 18:58:40,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 6 [2020-11-29 18:58:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:58:40,171 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-29 18:58:40,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:58:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-29 18:58:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 18:58:40,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:58:40,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:58:40,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:58:40,172 INFO L429 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 18:58:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:58:40,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1834766279, now seen corresponding path program 1 times [2020-11-29 18:58:40,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:58:40,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721882637] [2020-11-29 18:58:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:58:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:58:40,201 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:58:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:58:40,225 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:58:40,247 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:58:40,247 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:58:40,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:58:40,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:58:40 BoogieIcfgContainer [2020-11-29 18:58:40,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:58:40,278 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:58:40,278 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:58:40,278 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:58:40,279 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:58:39" (3/4) ... [2020-11-29 18:58:40,281 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:58:40,331 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3cdbae26-5e19-4e21-9183-16b315131cf9/bin/uautomizer/witness.graphml [2020-11-29 18:58:40,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:58:40,334 INFO L168 Benchmark]: Toolchain (without parser) took 1668.31 ms. Allocated memory is still 117.4 MB. Free memory was 86.0 MB in the beginning and 88.8 MB in the end (delta: -2.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:58:40,335 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory is still 47.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:58:40,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.57 ms. Allocated memory is still 117.4 MB. Free memory was 86.0 MB in the beginning and 95.4 MB in the end (delta: -9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:58:40,337 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.98 ms. Allocated memory is still 117.4 MB. Free memory was 95.4 MB in the beginning and 94.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:58:40,338 INFO L168 Benchmark]: Boogie Preprocessor took 26.98 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 93.3 MB in the end (delta: 805.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:58:40,339 INFO L168 Benchmark]: RCFGBuilder took 526.46 ms. Allocated memory is still 117.4 MB. Free memory was 92.9 MB in the beginning and 81.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:58:40,340 INFO L168 Benchmark]: TraceAbstraction took 711.97 ms. Allocated memory is still 117.4 MB. Free memory was 80.8 MB in the beginning and 90.3 MB in the end (delta: -9.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:58:40,341 INFO L168 Benchmark]: Witness Printer took 54.33 ms. Allocated memory is still 117.4 MB. Free memory was 90.3 MB in the beginning and 88.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:58:40,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory is still 47.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 298.57 ms. Allocated memory is still 117.4 MB. Free memory was 86.0 MB in the beginning and 95.4 MB in the end (delta: -9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.98 ms. Allocated memory is still 117.4 MB. Free memory was 95.4 MB in the beginning and 94.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.98 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 93.3 MB in the end (delta: 805.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 526.46 ms. Allocated memory is still 117.4 MB. Free memory was 92.9 MB in the beginning and 81.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 711.97 ms. Allocated memory is still 117.4 MB. Free memory was 80.8 MB in the beginning and 90.3 MB in the end (delta: -9.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 54.33 ms. Allocated memory is still 117.4 MB. Free memory was 90.3 MB in the beginning and 88.8 MB in the end (delta: 1.5 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...