./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/bitvector/modulus-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8d31f386 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/bitvector/modulus-2.i -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 c8679dad194af8e09f8dc0270d50ea9ce875abb3 ..................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config using search string *Overflow*32bit*_Bitvector*.epf No suitable settings file found using Overflow*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 15:42:37,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 15:42:37,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 15:42:37,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 15:42:37,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 15:42:37,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 15:42:37,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 15:42:37,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 15:42:37,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 15:42:37,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 15:42:37,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 15:42:37,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 15:42:37,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 15:42:37,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 15:42:37,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 15:42:37,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 15:42:37,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 15:42:37,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 15:42:37,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 15:42:37,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 15:42:37,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 15:42:37,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 15:42:37,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 15:42:37,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 15:42:38,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 15:42:38,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 15:42:38,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 15:42:38,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 15:42:38,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 15:42:38,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 15:42:38,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 15:42:38,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 15:42:38,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 15:42:38,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 15:42:38,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 15:42:38,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 15:42:38,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 15:42:38,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 15:42:38,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 15:42:38,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 15:42:38,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 15:42:38,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-07-06 15:42:38,028 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 15:42:38,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 15:42:38,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 15:42:38,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 15:42:38,029 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 15:42:38,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 15:42:38,030 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 15:42:38,030 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 15:42:38,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 15:42:38,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 15:42:38,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 15:42:38,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-06 15:42:38,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 15:42:38,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-06 15:42:38,031 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-07-06 15:42:38,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 15:42:38,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-06 15:42:38,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 15:42:38,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-06 15:42:38,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 15:42:38,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 15:42:38,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 15:42:38,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 15:42:38,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 15:42:38,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 15:42:38,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-06 15:42:38,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 15:42:38,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 15:42:38,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-06 15:42:38,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 15:42:38,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8679dad194af8e09f8dc0270d50ea9ce875abb3 [2021-07-06 15:42:38,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 15:42:38,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 15:42:38,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 15:42:38,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 15:42:38,275 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 15:42:38,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/modulus-2.i [2021-07-06 15:42:38,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d7a29c9/c0dab268ea624ffb95bf949ab36000b8/FLAGb7513a79e [2021-07-06 15:42:38,670 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 15:42:38,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/modulus-2.i [2021-07-06 15:42:38,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d7a29c9/c0dab268ea624ffb95bf949ab36000b8/FLAGb7513a79e [2021-07-06 15:42:39,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d7a29c9/c0dab268ea624ffb95bf949ab36000b8 [2021-07-06 15:42:39,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 15:42:39,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-06 15:42:39,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 15:42:39,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 15:42:39,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 15:42:39,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@479e4279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39, skipping insertion in model container [2021-07-06 15:42:39,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 15:42:39,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 15:42:39,201 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/modulus-2.i[947,960] [2021-07-06 15:42:39,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 15:42:39,214 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 15:42:39,222 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/modulus-2.i[947,960] [2021-07-06 15:42:39,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 15:42:39,234 INFO L208 MainTranslator]: Completed translation [2021-07-06 15:42:39,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39 WrapperNode [2021-07-06 15:42:39,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 15:42:39,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-06 15:42:39,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-06 15:42:39,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-06 15:42:39,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-06 15:42:39,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 15:42:39,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 15:42:39,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 15:42:39,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 15:42:39,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 15:42:39,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 15:42:39,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 15:42:39,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (1/1) ... [2021-07-06 15:42:39,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 15:42:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 15:42:39,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-06 15:42:39,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-06 15:42:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-06 15:42:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 15:42:39,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 15:42:39,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 15:42:39,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 15:42:39,621 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-07-06 15:42:39,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 03:42:39 BoogieIcfgContainer [2021-07-06 15:42:39,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 15:42:39,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 15:42:39,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 15:42:39,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 15:42:39,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 03:42:39" (1/3) ... [2021-07-06 15:42:39,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497e92e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 03:42:39, skipping insertion in model container [2021-07-06 15:42:39,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:42:39" (2/3) ... [2021-07-06 15:42:39,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497e92e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 03:42:39, skipping insertion in model container [2021-07-06 15:42:39,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 03:42:39" (3/3) ... [2021-07-06 15:42:39,634 INFO L111 eAbstractionObserver]: Analyzing ICFG modulus-2.i [2021-07-06 15:42:39,639 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 15:42:39,639 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-07-06 15:42:39,667 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW ======== [2021-07-06 15:42:39,671 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 15:42:39,671 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 15:42:39,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 15:42:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-07-06 15:42:39,682 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 15:42:39,692 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-07-06 15:42:39,692 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-07-06 15:42:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 15:42:39,696 INFO L82 PathProgramCache]: Analyzing trace with hash 925607, now seen corresponding path program 1 times [2021-07-06 15:42:39,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 15:42:39,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130066640] [2021-07-06 15:42:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 15:42:39,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 15:42:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 15:42:39,793 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:42:39,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 15:42:39,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:42:39,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 15:42:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 15:42:39,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 15:42:39,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130066640] [2021-07-06 15:42:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130066640] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 15:42:39,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 15:42:39,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-06 15:42:39,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291090827] [2021-07-06 15:42:39,811 INFO L425 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-06 15:42:39,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 15:42:39,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-06 15:42:39,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-06 15:42:39,820 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 15:42:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 15:42:39,830 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-07-06 15:42:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-06 15:42:39,831 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-07-06 15:42:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 15:42:39,835 INFO L225 Difference]: With dead ends: 43 [2021-07-06 15:42:39,835 INFO L226 Difference]: Without dead ends: 5 [2021-07-06 15:42:39,837 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-06 15:42:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2021-07-06 15:42:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-07-06 15:42:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 15:42:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 4 transitions. [2021-07-06 15:42:39,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 4 transitions. Word has length 4 [2021-07-06 15:42:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 15:42:39,855 INFO L442 AbstractCegarLoop]: Abstraction has 5 states and 4 transitions. [2021-07-06 15:42:39,856 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 15:42:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2021-07-06 15:42:39,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-07-06 15:42:39,856 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 15:42:39,856 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-07-06 15:42:39,857 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 15:42:39,857 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-07-06 15:42:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 15:42:39,860 INFO L82 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2021-07-06 15:42:39,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 15:42:39,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328122684] [2021-07-06 15:42:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 15:42:39,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 15:42:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 15:42:39,888 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 15:42:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 15:42:39,896 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 15:42:39,906 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 15:42:39,909 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-06 15:42:39,911 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 15:42:39,911 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 15:42:39,915 INFO L303 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW was UNSAFE (1/4) [2021-07-06 15:42:39,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 03:42:39 BoogieIcfgContainer [2021-07-06 15:42:39,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 15:42:39,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 15:42:39,930 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 15:42:39,930 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 15:42:39,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 03:42:39" (3/4) ... [2021-07-06 15:42:39,933 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-07-06 15:42:39,933 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 15:42:39,934 INFO L168 Benchmark]: Toolchain (without parser) took 843.85 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 52.9 MB in the beginning and 57.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-07-06 15:42:39,935 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory is still 52.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 15:42:39,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 142.64 ms. Allocated memory is still 69.2 MB. Free memory was 52.8 MB in the beginning and 42.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-07-06 15:42:39,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.29 ms. Allocated memory is still 69.2 MB. Free memory was 42.9 MB in the beginning and 53.3 MB in the end (delta: -10.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 15:42:39,942 INFO L168 Benchmark]: Boogie Preprocessor took 31.35 ms. Allocated memory is still 69.2 MB. Free memory was 53.3 MB in the beginning and 52.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 15:42:39,942 INFO L168 Benchmark]: RCFGBuilder took 300.33 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 38.6 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-06 15:42:39,942 INFO L168 Benchmark]: TraceAbstraction took 305.75 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 38.2 MB in the beginning and 57.5 MB in the end (delta: -19.3 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-07-06 15:42:39,943 INFO L168 Benchmark]: Witness Printer took 3.27 ms. Allocated memory is still 90.2 MB. Free memory was 57.5 MB in the beginning and 57.0 MB in the end (delta: 508.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 15:42:39,948 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory is still 52.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 142.64 ms. Allocated memory is still 69.2 MB. Free memory was 52.8 MB in the beginning and 42.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.29 ms. Allocated memory is still 69.2 MB. Free memory was 42.9 MB in the beginning and 53.3 MB in the end (delta: -10.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.35 ms. Allocated memory is still 69.2 MB. Free memory was 53.3 MB in the beginning and 52.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 300.33 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 38.6 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 305.75 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 38.2 MB in the beginning and 57.5 MB in the end (delta: -19.3 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Witness Printer took 3.27 ms. Allocated memory is still 90.2 MB. Free memory was 57.5 MB in the beginning and 57.0 MB in the end (delta: 508.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 43]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of shiftLeft at line 43. Possible FailurePath: [L38] unsigned int n = __VERIFIER_nondet_uint(); [L39] unsigned int s = __VERIFIER_nondet_uint(); [L40] unsigned int d; [L41] unsigned int m; [L3] COND FALSE !(!cond) [L43] 1 << s - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW CFG has 1 procedures, 23 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 248.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.2ms, AutomataDifference: 25.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.2ms SsaConstructionTime, 28.5ms SatisfiabilityAnalysisTime, 33.7ms InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 3 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 could not prove your program: unable to determine feasibility of some traces [2021-07-06 15:42:39,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...