./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cbmc-regression/float2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/floats-cbmc-regression/float2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a9c16fc526c8975deb8347cefa91cf6b0e12443 ........................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/floats-cbmc-regression/float2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a9c16fc526c8975deb8347cefa91cf6b0e12443 ........................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-27 23:34:29,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:34:29,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:34:29,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:34:29,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:34:29,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:34:29,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:34:29,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:34:29,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:34:29,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:34:29,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:34:29,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:34:29,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:34:29,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:34:29,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:34:29,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:34:29,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:34:29,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:34:29,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:34:29,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:34:29,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:34:29,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:34:29,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:34:29,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:34:29,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:34:29,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:34:29,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:34:29,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:34:29,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:34:29,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:34:29,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:34:29,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:34:29,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:34:29,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:34:29,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:34:29,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:34:29,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:34:29,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:34:29,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:34:29,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:34:29,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:34:29,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:34:29,377 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:34:29,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:34:29,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:34:29,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:34:29,379 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:34:29,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:34:29,379 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:34:29,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:34:29,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:34:29,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:34:29,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:34:29,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:34:29,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:34:29,381 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:34:29,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:34:29,382 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:34:29,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:34:29,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:34:29,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:34:29,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:34:29,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:34:29,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:34:29,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:34:29,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:34:29,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:34:29,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:34:29,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:34:29,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:34:29,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a9c16fc526c8975deb8347cefa91cf6b0e12443 [2019-11-27 23:34:29,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:34:29,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:34:29,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:34:29,753 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:34:29,753 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:34:29,754 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cbmc-regression/float2.c [2019-11-27 23:34:29,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9fd27a4/966f5cd7751e4a7a92340d3a5f08f963/FLAG85d2e1835 [2019-11-27 23:34:30,230 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:34:30,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float2.c [2019-11-27 23:34:30,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9fd27a4/966f5cd7751e4a7a92340d3a5f08f963/FLAG85d2e1835 [2019-11-27 23:34:30,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9fd27a4/966f5cd7751e4a7a92340d3a5f08f963 [2019-11-27 23:34:30,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:34:30,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:34:30,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:34:30,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:34:30,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:34:30,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:30,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6373eea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30, skipping insertion in model container [2019-11-27 23:34:30,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:30,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:34:30,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:34:30,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:34:30,882 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:34:30,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:34:30,918 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:34:30,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30 WrapperNode [2019-11-27 23:34:30,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:34:30,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:34:30,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:34:30,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:34:30,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:30,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:31,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:34:31,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:34:31,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:34:31,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:34:31,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:31,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:31,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:31,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:31,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:31,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:31,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (1/1) ... [2019-11-27 23:34:31,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:34:31,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:34:31,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:34:31,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:34:31,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (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 [2019-11-27 23:34:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:34:31,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:34:31,292 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:34:31,292 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-27 23:34:31,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:34:31 BoogieIcfgContainer [2019-11-27 23:34:31,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:34:31,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:34:31,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:34:31,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:34:31,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:34:30" (1/3) ... [2019-11-27 23:34:31,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aded0ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:34:31, skipping insertion in model container [2019-11-27 23:34:31,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:30" (2/3) ... [2019-11-27 23:34:31,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aded0ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:34:31, skipping insertion in model container [2019-11-27 23:34:31,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:34:31" (3/3) ... [2019-11-27 23:34:31,323 INFO L109 eAbstractionObserver]: Analyzing ICFG float2.c [2019-11-27 23:34:31,337 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:34:31,349 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-27 23:34:31,379 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-27 23:34:31,430 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:34:31,430 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:34:31,430 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:34:31,431 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:34:31,431 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:34:31,431 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:34:31,432 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:34:31,432 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:34:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-27 23:34:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-27 23:34:31,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:34:31,458 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-27 23:34:31,459 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:34:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:34:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash 30881, now seen corresponding path program 1 times [2019-11-27 23:34:31,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:34:31,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431878515] [2019-11-27 23:34:31,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:34:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:34:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:34:31,601 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:34:31,602 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:34:31,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:34:31 BoogieIcfgContainer [2019-11-27 23:34:31,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:34:31,618 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:34:31,618 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:34:31,618 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:34:31,619 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:34:31" (3/4) ... [2019-11-27 23:34:31,622 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-27 23:34:31,622 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:34:31,626 INFO L168 Benchmark]: Toolchain (without parser) took 1033.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -120.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:34:31,627 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:34:31,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.69 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:31,631 INFO L168 Benchmark]: Boogie Procedure Inliner took 119.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -165.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:31,633 INFO L168 Benchmark]: Boogie Preprocessor took 22.99 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:34:31,634 INFO L168 Benchmark]: RCFGBuilder took 232.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:31,635 INFO L168 Benchmark]: TraceAbstraction took 320.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:31,636 INFO L168 Benchmark]: Witness Printer took 4.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:34:31,640 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 325.69 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 119.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -165.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.99 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 232.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 320.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. * Witness Printer took 4.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 10. Possible FailurePath: [L5] float a; [L6] double b; [L9] a=1.25L [L10] COND TRUE !(a==1.25) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 4 error locations. Result: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-30f4e4a [2019-11-27 23:34:33,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:34:33,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:34:33,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:34:33,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:34:33,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:34:33,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:34:33,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:34:33,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:34:33,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:34:33,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:34:33,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:34:33,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:34:33,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:34:33,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:34:33,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:34:33,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:34:33,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:34:33,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:34:33,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:34:33,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:34:33,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:34:33,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:34:33,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:34:33,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:34:33,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:34:33,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:34:33,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:34:33,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:34:33,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:34:33,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:34:33,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:34:33,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:34:33,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:34:33,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:34:33,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:34:33,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:34:33,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:34:33,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:34:33,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:34:33,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:34:33,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-27 23:34:33,821 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:34:33,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:34:33,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:34:33,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:34:33,824 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:34:33,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:34:33,824 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:34:33,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:34:33,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:34:33,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:34:33,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:34:33,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:34:33,826 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-27 23:34:33,826 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-27 23:34:33,827 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:34:33,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:34:33,827 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:34:33,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:34:33,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:34:33,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:34:33,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:34:33,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:34:33,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:34:33,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:34:33,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:34:33,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:34:33,830 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-27 23:34:33,830 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-27 23:34:33,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:34:33,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-27 23:34:33,831 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a9c16fc526c8975deb8347cefa91cf6b0e12443 [2019-11-27 23:34:34,168 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:34:34,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:34:34,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:34:34,199 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:34:34,199 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:34:34,201 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cbmc-regression/float2.c [2019-11-27 23:34:34,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25998f90a/bff26a6897674b5db8536fcc1bccb313/FLAG4cf252c80 [2019-11-27 23:34:34,772 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:34:34,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float2.c [2019-11-27 23:34:34,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25998f90a/bff26a6897674b5db8536fcc1bccb313/FLAG4cf252c80 [2019-11-27 23:34:35,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25998f90a/bff26a6897674b5db8536fcc1bccb313 [2019-11-27 23:34:35,106 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:34:35,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:34:35,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:34:35,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:34:35,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:34:35,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198c21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35, skipping insertion in model container [2019-11-27 23:34:35,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:34:35,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:34:35,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:34:35,295 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:34:35,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:34:35,329 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:34:35,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35 WrapperNode [2019-11-27 23:34:35,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:34:35,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:34:35,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:34:35,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:34:35,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:34:35,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:34:35,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:34:35,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:34:35,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (1/1) ... [2019-11-27 23:34:35,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:34:35,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:34:35,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:34:35,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:34:35,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (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 [2019-11-27 23:34:35,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:34:35,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:34:35,810 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:34:35,810 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-27 23:34:35,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:34:35 BoogieIcfgContainer [2019-11-27 23:34:35,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:34:35,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:34:35,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:34:35,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:34:35,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:34:35" (1/3) ... [2019-11-27 23:34:35,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f852c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:34:35, skipping insertion in model container [2019-11-27 23:34:35,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:34:35" (2/3) ... [2019-11-27 23:34:35,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f852c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:34:35, skipping insertion in model container [2019-11-27 23:34:35,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:34:35" (3/3) ... [2019-11-27 23:34:35,821 INFO L109 eAbstractionObserver]: Analyzing ICFG float2.c [2019-11-27 23:34:35,832 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:34:35,840 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-27 23:34:35,854 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-27 23:34:35,882 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:34:35,883 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:34:35,883 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:34:35,884 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:34:35,884 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:34:35,884 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:34:35,884 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:34:35,885 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:34:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-27 23:34:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-27 23:34:35,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:34:35,920 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-27 23:34:35,924 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:34:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:34:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2019-11-27 23:34:35,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:34:35,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114422180] [2019-11-27 23:34:35,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-11-27 23:34:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:34:36,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-27 23:34:36,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:34:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:34:36,090 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:34:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:34:36,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114422180] [2019-11-27 23:34:36,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:34:36,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-27 23:34:36,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761867212] [2019-11-27 23:34:36,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 23:34:36,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:34:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 23:34:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:34:36,284 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-27 23:34:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:34:36,419 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-27 23:34:36,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:34:36,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-27 23:34:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:34:36,436 INFO L225 Difference]: With dead ends: 35 [2019-11-27 23:34:36,436 INFO L226 Difference]: Without dead ends: 15 [2019-11-27 23:34:36,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:34:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-27 23:34:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-27 23:34:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-27 23:34:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2019-11-27 23:34:36,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 4 [2019-11-27 23:34:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:34:36,470 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2019-11-27 23:34:36,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 23:34:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2019-11-27 23:34:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-27 23:34:36,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:34:36,472 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-27 23:34:36,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-27 23:34:36,685 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:34:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:34:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash 889629862, now seen corresponding path program 1 times [2019-11-27 23:34:36,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:34:36,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345733630] [2019-11-27 23:34:36,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-11-27 23:34:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:34:36,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-27 23:34:36,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:34:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:34:36,728 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:34:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:34:36,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345733630] [2019-11-27 23:34:36,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:34:36,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-27 23:34:36,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484991836] [2019-11-27 23:34:36,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 23:34:36,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:34:36,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 23:34:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:34:36,742 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 3 states. [2019-11-27 23:34:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:34:36,802 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2019-11-27 23:34:36,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:34:36,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-27 23:34:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:34:36,803 INFO L225 Difference]: With dead ends: 15 [2019-11-27 23:34:36,803 INFO L226 Difference]: Without dead ends: 13 [2019-11-27 23:34:36,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:34:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-27 23:34:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-27 23:34:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-27 23:34:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2019-11-27 23:34:36,810 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 6 [2019-11-27 23:34:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:34:36,811 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2019-11-27 23:34:36,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 23:34:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2019-11-27 23:34:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-27 23:34:36,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:34:36,813 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:34:37,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-27 23:34:37,026 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:34:37,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:34:37,027 INFO L82 PathProgramCache]: Analyzing trace with hash 235930184, now seen corresponding path program 1 times [2019-11-27 23:34:37,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:34:37,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695035695] [2019-11-27 23:34:37,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-11-27 23:34:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:34:37,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-27 23:34:37,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:34:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:34:37,073 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:34:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:34:37,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695035695] [2019-11-27 23:34:37,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:34:37,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-27 23:34:37,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916481779] [2019-11-27 23:34:37,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 23:34:37,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:34:37,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 23:34:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:34:37,086 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand 3 states. [2019-11-27 23:34:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:34:37,217 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2019-11-27 23:34:37,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:34:37,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-27 23:34:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:34:37,218 INFO L225 Difference]: With dead ends: 13 [2019-11-27 23:34:37,218 INFO L226 Difference]: Without dead ends: 11 [2019-11-27 23:34:37,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:34:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-27 23:34:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-27 23:34:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-27 23:34:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2019-11-27 23:34:37,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 8 [2019-11-27 23:34:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:34:37,222 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2019-11-27 23:34:37,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 23:34:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2019-11-27 23:34:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 23:34:37,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:34:37,224 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:34:37,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-27 23:34:37,434 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:34:37,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:34:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash -904234870, now seen corresponding path program 1 times [2019-11-27 23:34:37,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:34:37,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490317110] [2019-11-27 23:34:37,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-11-27 23:34:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:34:37,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-27 23:34:37,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:34:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:34:37,491 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:34:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:34:37,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490317110] [2019-11-27 23:34:37,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:34:37,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-27 23:34:37,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370476630] [2019-11-27 23:34:37,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 23:34:37,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:34:37,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 23:34:37,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:34:37,506 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 3 states. [2019-11-27 23:34:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:34:37,593 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2019-11-27 23:34:37,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:34:37,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-27 23:34:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:34:37,595 INFO L225 Difference]: With dead ends: 11 [2019-11-27 23:34:37,595 INFO L226 Difference]: Without dead ends: 0 [2019-11-27 23:34:37,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:34:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-27 23:34:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-27 23:34:37,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-27 23:34:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-27 23:34:37,597 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-11-27 23:34:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:34:37,597 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-27 23:34:37,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 23:34:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-27 23:34:37,598 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-27 23:34:37,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-27 23:34:37,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-27 23:34:37,804 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-27 23:34:37,804 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-27 23:34:37,804 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2019-11-27 23:34:37,805 INFO L246 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2019-11-27 23:34:37,805 INFO L246 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-27 23:34:37,805 INFO L246 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2019-11-27 23:34:37,805 INFO L246 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2019-11-27 23:34:37,805 INFO L246 CegarLoopResult]: For program point L17-3(line 17) no Hoare annotation was computed. [2019-11-27 23:34:37,805 INFO L246 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-27 23:34:37,805 INFO L246 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point L3(lines 3 22) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2019-11-27 23:34:37,806 INFO L246 CegarLoopResult]: For program point L10-1(line 10) no Hoare annotation was computed. [2019-11-27 23:34:37,807 INFO L246 CegarLoopResult]: For program point L10-3(line 10) no Hoare annotation was computed. [2019-11-27 23:34:37,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:34:37 BoogieIcfgContainer [2019-11-27 23:34:37,812 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:34:37,813 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:34:37,813 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:34:37,813 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:34:37,814 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:34:35" (3/4) ... [2019-11-27 23:34:37,816 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-27 23:34:37,827 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-27 23:34:37,828 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-27 23:34:37,828 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-27 23:34:37,867 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:34:37,867 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:34:37,869 INFO L168 Benchmark]: Toolchain (without parser) took 2760.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -106.9 MB). Peak memory consumption was 38.3 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:37,870 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:34:37,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.18 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:37,871 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.84 ms. Allocated memory is still 1.0 GB. Free memory is still 940.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:34:37,873 INFO L168 Benchmark]: Boogie Preprocessor took 85.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -194.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:37,873 INFO L168 Benchmark]: RCFGBuilder took 359.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:37,874 INFO L168 Benchmark]: TraceAbstraction took 1999.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 64.7 MB). Peak memory consumption was 64.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:34:37,875 INFO L168 Benchmark]: Witness Printer took 54.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:34:37,879 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 221.18 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.84 ms. Allocated memory is still 1.0 GB. Free memory is still 940.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 85.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -194.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 359.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1999.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 64.7 MB). Peak memory consumption was 64.7 MB. Max. memory is 11.5 GB. * Witness Printer took 54.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 21]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 4 error locations. Result: SAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 14 SDslu, 5 SDs, 0 SdLazy, 37 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 0 LocationsWithAnnotation, 0 PreInvPairs, 0 NumberOfFragments, 0 HoareAnnotationTreeSize, 0 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 0 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 596 SizeOfPredicates, 8 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...