./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 f470102c 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 0.1.25-f470102 [2019-11-28 16:38:58,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:38:58,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:38:58,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:38:58,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:38:58,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:38:58,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:38:58,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:38:58,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:38:58,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:38:58,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:38:58,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:38:58,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:38:58,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:38:58,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:38:58,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:38:58,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:38:58,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:38:58,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:38:58,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:38:58,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:38:58,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:38:58,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:38:58,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:38:58,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:38:58,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:38:58,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:38:58,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:38:58,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:38:58,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:38:58,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:38:58,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:38:58,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:38:58,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:38:58,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:38:58,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:38:58,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:38:58,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:38:58,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:38:58,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:38:58,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:38:58,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:38:58,570 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:38:58,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:38:58,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:38:58,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:38:58,574 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:38:58,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:38:58,575 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:38:58,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:38:58,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:38:58,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:38:58,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:38:58,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:38:58,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:38:58,578 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:38:58,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:38:58,579 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:38:58,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:38:58,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:38:58,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:38:58,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:38:58,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:38:58,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:38:58,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:38:58,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:38:58,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:38:58,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:38:58,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:38:58,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:38:58,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:38:58,583 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 [2019-11-28 16:38:58,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:38:58,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:38:58,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:38:58,910 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:38:58,911 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:38:58,912 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cbmc-regression/float2.c [2019-11-28 16:38:58,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5860f499/4e14a3b38a9649f8adafa8d36886050d/FLAG9949f1d05 [2019-11-28 16:38:59,461 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:38:59,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float2.c [2019-11-28 16:38:59,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5860f499/4e14a3b38a9649f8adafa8d36886050d/FLAG9949f1d05 [2019-11-28 16:38:59,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5860f499/4e14a3b38a9649f8adafa8d36886050d [2019-11-28 16:38:59,804 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:38:59,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:38:59,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:38:59,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:38:59,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:38:59,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:38:59" (1/1) ... [2019-11-28 16:38:59,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44256411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:38:59, skipping insertion in model container [2019-11-28 16:38:59,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:38:59" (1/1) ... [2019-11-28 16:38:59,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:38:59,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:39:00,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:39:00,068 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:39:00,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:39:00,104 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:39:00,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00 WrapperNode [2019-11-28 16:39:00,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:39:00,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:39:00,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:39:00,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:39:00,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:39:00,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:39:00,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:39:00,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:39:00,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (1/1) ... [2019-11-28 16:39:00,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:39:00,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:39:00,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:39:00,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:39:00,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (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 [2019-11-28 16:39:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:39:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:39:00,451 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:39:00,451 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 16:39:00,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:00 BoogieIcfgContainer [2019-11-28 16:39:00,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:39:00,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:39:00,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:39:00,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:39:00,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:38:59" (1/3) ... [2019-11-28 16:39:00,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3558b57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:39:00, skipping insertion in model container [2019-11-28 16:39:00,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:00" (2/3) ... [2019-11-28 16:39:00,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3558b57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:39:00, skipping insertion in model container [2019-11-28 16:39:00,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:00" (3/3) ... [2019-11-28 16:39:00,474 INFO L109 eAbstractionObserver]: Analyzing ICFG float2.c [2019-11-28 16:39:00,491 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:39:00,503 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-28 16:39:00,541 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-28 16:39:00,583 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:39:00,584 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:39:00,584 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:39:00,584 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:39:00,585 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:39:00,585 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:39:00,585 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:39:00,585 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:39:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-28 16:39:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-28 16:39:00,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:39:00,619 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-28 16:39:00,620 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:39:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:39:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash 30881, now seen corresponding path program 1 times [2019-11-28 16:39:00,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:39:00,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462664471] [2019-11-28 16:39:00,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:39:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:39:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:39:00,737 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:39:00,737 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:39:00,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:39:00 BoogieIcfgContainer [2019-11-28 16:39:00,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:39:00,753 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:39:00,754 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:39:00,754 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:39:00,754 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:00" (3/4) ... [2019-11-28 16:39:00,758 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 16:39:00,759 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:39:00,762 INFO L168 Benchmark]: Toolchain (without parser) took 954.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -136.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:39:00,762 INFO L168 Benchmark]: CDTParser took 0.29 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. [2019-11-28 16:39:00,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.81 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. [2019-11-28 16:39:00,765 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -173.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:00,766 INFO L168 Benchmark]: Boogie Preprocessor took 18.40 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. [2019-11-28 16:39:00,767 INFO L168 Benchmark]: RCFGBuilder took 228.74 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: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:00,768 INFO L168 Benchmark]: TraceAbstraction took 298.72 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: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:00,768 INFO L168 Benchmark]: Witness Printer took 5.36 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. [2019-11-28 16:39:00,773 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 298.81 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 98.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -173.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.40 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. * RCFGBuilder took 228.74 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: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 298.72 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: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 11.5 GB. * Witness Printer took 5.36 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: - 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 0.1.25-f470102 [2019-11-28 16:39:02,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:39:02,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:39:02,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:39:02,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:39:02,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:39:02,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:39:02,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:39:02,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:39:02,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:39:02,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:39:02,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:39:02,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:39:02,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:39:02,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:39:02,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:39:02,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:39:02,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:39:02,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:39:02,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:39:02,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:39:02,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:39:02,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:39:02,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:39:02,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:39:02,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:39:02,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:39:02,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:39:02,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:39:02,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:39:02,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:39:02,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:39:02,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:39:02,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:39:02,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:39:02,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:39:02,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:39:02,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:39:02,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:39:02,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:39:02,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:39:02,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-28 16:39:02,870 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:39:02,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:39:02,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:39:02,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:39:02,873 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:39:02,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:39:02,874 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:39:02,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:39:02,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:39:02,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:39:02,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:39:02,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:39:02,877 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-28 16:39:02,877 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-28 16:39:02,878 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:39:02,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:39:02,878 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:39:02,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:39:02,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:39:02,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:39:02,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:39:02,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:39:02,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:39:02,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:39:02,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:39:02,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:39:02,882 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-28 16:39:02,882 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-28 16:39:02,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:39:02,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:39:02,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-28 16:39:02,883 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 [2019-11-28 16:39:03,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:39:03,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:39:03,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:39:03,227 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:39:03,228 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:39:03,229 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cbmc-regression/float2.c [2019-11-28 16:39:03,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ddc55f5/db217f4a3328493780720a8bd6f12edd/FLAGb44df3e94 [2019-11-28 16:39:03,737 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:39:03,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float2.c [2019-11-28 16:39:03,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ddc55f5/db217f4a3328493780720a8bd6f12edd/FLAGb44df3e94 [2019-11-28 16:39:04,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ddc55f5/db217f4a3328493780720a8bd6f12edd [2019-11-28 16:39:04,147 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:39:04,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:39:04,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:39:04,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:39:04,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:39:04,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1844f808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04, skipping insertion in model container [2019-11-28 16:39:04,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:39:04,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:39:04,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:39:04,379 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:39:04,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:39:04,416 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:39:04,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04 WrapperNode [2019-11-28 16:39:04,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:39:04,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:39:04,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:39:04,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:39:04,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:39:04,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:39:04,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:39:04,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:39:04,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (1/1) ... [2019-11-28 16:39:04,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:39:04,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:39:04,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:39:04,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:39:04,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (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 [2019-11-28 16:39:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:39:04,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:39:04,879 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:39:04,879 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 16:39:04,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:04 BoogieIcfgContainer [2019-11-28 16:39:04,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:39:04,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:39:04,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:39:04,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:39:04,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:39:04" (1/3) ... [2019-11-28 16:39:04,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ab764f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:39:04, skipping insertion in model container [2019-11-28 16:39:04,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:04" (2/3) ... [2019-11-28 16:39:04,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ab764f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:39:04, skipping insertion in model container [2019-11-28 16:39:04,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:04" (3/3) ... [2019-11-28 16:39:04,889 INFO L109 eAbstractionObserver]: Analyzing ICFG float2.c [2019-11-28 16:39:04,899 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:39:04,906 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-28 16:39:04,919 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-28 16:39:04,945 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:39:04,946 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:39:04,946 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:39:04,946 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:39:04,946 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:39:04,946 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:39:04,947 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:39:04,947 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:39:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-28 16:39:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-28 16:39:04,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:39:04,969 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-28 16:39:04,969 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:39:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:39:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2019-11-28 16:39:04,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:39:04,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566751131] [2019-11-28 16:39:04,989 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 [2019-11-28 16:39:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:39:05,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 16:39:05,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:39:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:39:05,121 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:39:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:39:05,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566751131] [2019-11-28 16:39:05,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:39:05,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-28 16:39:05,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328139909] [2019-11-28 16:39:05,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:39:05,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:39:05,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:39:05,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:39:05,318 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-28 16:39:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:39:05,419 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-28 16:39:05,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:39:05,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-28 16:39:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:39:05,432 INFO L225 Difference]: With dead ends: 35 [2019-11-28 16:39:05,432 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 16:39:05,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:39:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 16:39:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 16:39:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 16:39:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2019-11-28 16:39:05,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 4 [2019-11-28 16:39:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:39:05,470 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2019-11-28 16:39:05,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:39:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2019-11-28 16:39:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 16:39:05,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:39:05,471 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 16:39:05,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-28 16:39:05,683 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:39:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:39:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash 889629862, now seen corresponding path program 1 times [2019-11-28 16:39:05,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:39:05,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932653141] [2019-11-28 16:39:05,685 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 [2019-11-28 16:39:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:39:05,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 16:39:05,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:39:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:39:05,734 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:39:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:39:05,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932653141] [2019-11-28 16:39:05,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:39:05,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-28 16:39:05,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733348779] [2019-11-28 16:39:05,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:39:05,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:39:05,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:39:05,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:39:05,746 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 3 states. [2019-11-28 16:39:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:39:05,814 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2019-11-28 16:39:05,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:39:05,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-28 16:39:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:39:05,815 INFO L225 Difference]: With dead ends: 15 [2019-11-28 16:39:05,816 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 16:39:05,816 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 [2019-11-28 16:39:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 16:39:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 16:39:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 16:39:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2019-11-28 16:39:05,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 6 [2019-11-28 16:39:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:39:05,820 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2019-11-28 16:39:05,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:39:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2019-11-28 16:39:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 16:39:05,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:39:05,822 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:39:06,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-28 16:39:06,024 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:39:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:39:06,026 INFO L82 PathProgramCache]: Analyzing trace with hash 235930184, now seen corresponding path program 1 times [2019-11-28 16:39:06,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:39:06,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672050528] [2019-11-28 16:39:06,027 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 [2019-11-28 16:39:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:39:06,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 16:39:06,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:39:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:39:06,076 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:39:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:39:06,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672050528] [2019-11-28 16:39:06,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:39:06,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-28 16:39:06,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255112198] [2019-11-28 16:39:06,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:39:06,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:39:06,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:39:06,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:39:06,092 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand 3 states. [2019-11-28 16:39:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:39:06,193 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2019-11-28 16:39:06,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:39:06,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-28 16:39:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:39:06,195 INFO L225 Difference]: With dead ends: 13 [2019-11-28 16:39:06,195 INFO L226 Difference]: Without dead ends: 11 [2019-11-28 16:39:06,196 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 [2019-11-28 16:39:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-28 16:39:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-28 16:39:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 16:39:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2019-11-28 16:39:06,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 8 [2019-11-28 16:39:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:39:06,201 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2019-11-28 16:39:06,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:39:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2019-11-28 16:39:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 16:39:06,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:39:06,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:39:06,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-28 16:39:06,404 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:39:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:39:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash -904234870, now seen corresponding path program 1 times [2019-11-28 16:39:06,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:39:06,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287982274] [2019-11-28 16:39:06,407 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 [2019-11-28 16:39:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:39:06,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 16:39:06,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:39:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:39:06,468 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:39:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:39:06,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287982274] [2019-11-28 16:39:06,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:39:06,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-28 16:39:06,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477892891] [2019-11-28 16:39:06,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:39:06,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:39:06,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:39:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:39:06,483 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 3 states. [2019-11-28 16:39:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:39:06,582 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2019-11-28 16:39:06,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:39:06,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-28 16:39:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:39:06,583 INFO L225 Difference]: With dead ends: 11 [2019-11-28 16:39:06,583 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 16:39:06,584 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 [2019-11-28 16:39:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 16:39:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 16:39:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 16:39:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 16:39:06,584 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-11-28 16:39:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:39:06,585 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 16:39:06,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:39:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 16:39:06,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 16:39:06,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-28 16:39:06,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 16:39:06,793 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 16:39:06,793 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-28 16:39:06,793 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2019-11-28 16:39:06,793 INFO L246 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2019-11-28 16:39:06,793 INFO L246 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-28 16:39:06,793 INFO L246 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2019-11-28 16:39:06,794 INFO L246 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2019-11-28 16:39:06,794 INFO L246 CegarLoopResult]: For program point L17-3(line 17) no Hoare annotation was computed. [2019-11-28 16:39:06,794 INFO L246 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-28 16:39:06,794 INFO L246 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-28 16:39:06,794 INFO L246 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-28 16:39:06,794 INFO L246 CegarLoopResult]: For program point L3(lines 3 22) no Hoare annotation was computed. [2019-11-28 16:39:06,794 INFO L246 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-28 16:39:06,794 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 16:39:06,795 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 16:39:06,795 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2019-11-28 16:39:06,795 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2019-11-28 16:39:06,795 INFO L246 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2019-11-28 16:39:06,795 INFO L246 CegarLoopResult]: For program point L10-1(line 10) no Hoare annotation was computed. [2019-11-28 16:39:06,795 INFO L246 CegarLoopResult]: For program point L10-3(line 10) no Hoare annotation was computed. [2019-11-28 16:39:06,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:39:06 BoogieIcfgContainer [2019-11-28 16:39:06,801 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:39:06,801 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:39:06,802 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:39:06,802 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:39:06,802 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:04" (3/4) ... [2019-11-28 16:39:06,806 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 16:39:06,821 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-28 16:39:06,821 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 16:39:06,821 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-28 16:39:06,863 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:39:06,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:39:06,865 INFO L168 Benchmark]: Toolchain (without parser) took 2716.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 956.3 MB in the beginning and 1.0 GB in the end (delta: -59.3 MB). Peak memory consumption was 47.1 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:06,866 INFO L168 Benchmark]: CDTParser took 0.29 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. [2019-11-28 16:39:06,867 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.22 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:06,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 93.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -157.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:06,868 INFO L168 Benchmark]: Boogie Preprocessor took 23.84 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:06,869 INFO L168 Benchmark]: RCFGBuilder took 345.00 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: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:06,869 INFO L168 Benchmark]: TraceAbstraction took 1919.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.3 MB). Peak memory consumption was 60.3 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:06,870 INFO L168 Benchmark]: Witness Printer took 61.58 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-28 16:39:06,874 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 268.22 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 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 93.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -157.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.84 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 345.00 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: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1919.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.3 MB). Peak memory consumption was 60.3 MB. Max. memory is 11.5 GB. * Witness Printer took 61.58 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. 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: 1.8s, 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...