./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1252a.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f8d72d06ca136037e1a4f2d3dda81b71758b03c ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1252a.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f8d72d06ca136037e1a4f2d3dda81b71758b03c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 01:54:15,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 01:54:15,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 01:54:15,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 01:54:15,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 01:54:15,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 01:54:15,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 01:54:15,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 01:54:15,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 01:54:15,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 01:54:15,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 01:54:15,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 01:54:15,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 01:54:15,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 01:54:15,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 01:54:15,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 01:54:15,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 01:54:15,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 01:54:15,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 01:54:15,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 01:54:15,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 01:54:15,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 01:54:15,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 01:54:15,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 01:54:15,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 01:54:15,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 01:54:15,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 01:54:15,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 01:54:15,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 01:54:15,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 01:54:15,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 01:54:15,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 01:54:15,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 01:54:15,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 01:54:15,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 01:54:15,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 01:54:15,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 01:54:15,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 01:54:15,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 01:54:15,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 01:54:15,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 01:54:15,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 01:54:15,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 01:54:15,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 01:54:15,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 01:54:15,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 01:54:15,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 01:54:15,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 01:54:15,607 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 01:54:15,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 01:54:15,608 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 01:54:15,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 01:54:15,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 01:54:15,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 01:54:15,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 01:54:15,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 01:54:15,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 01:54:15,609 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 01:54:15,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 01:54:15,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 01:54:15,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 01:54:15,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 01:54:15,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 01:54:15,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 01:54:15,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 01:54:15,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 01:54:15,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 01:54:15,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 01:54:15,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 01:54:15,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 01:54:15,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 01:54:15,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 01:54:15,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2021-08-26 01:54:15,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 01:54:15,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 01:54:15,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 01:54:15,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 01:54:15,921 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 01:54:15,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-08-26 01:54:15,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/637215cea/d255d595d0f8425a9a02a417c6b97ca1/FLAG1cfc37d8e [2021-08-26 01:54:16,447 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 01:54:16,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-08-26 01:54:16,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/637215cea/d255d595d0f8425a9a02a417c6b97ca1/FLAG1cfc37d8e [2021-08-26 01:54:16,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/637215cea/d255d595d0f8425a9a02a417c6b97ca1 [2021-08-26 01:54:16,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 01:54:16,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 01:54:16,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 01:54:16,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 01:54:16,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 01:54:16,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:54:16" (1/1) ... [2021-08-26 01:54:16,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e531dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:16, skipping insertion in model container [2021-08-26 01:54:16,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:54:16" (1/1) ... [2021-08-26 01:54:16,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 01:54:16,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 01:54:16,985 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-08-26 01:54:16,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 01:54:16,993 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 01:54:17,010 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-08-26 01:54:17,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 01:54:17,028 INFO L208 MainTranslator]: Completed translation [2021-08-26 01:54:17,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17 WrapperNode [2021-08-26 01:54:17,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 01:54:17,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 01:54:17,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 01:54:17,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 01:54:17,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 01:54:17,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 01:54:17,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 01:54:17,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 01:54:17,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 01:54:17,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 01:54:17,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 01:54:17,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 01:54:17,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (1/1) ... [2021-08-26 01:54:17,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 01:54:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 01:54:17,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 01:54:17,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 01:54:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 01:54:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 01:54:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-08-26 01:54:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 01:54:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 01:54:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 01:54:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 01:54:17,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 01:54:17,484 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-08-26 01:54:17,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:17 BoogieIcfgContainer [2021-08-26 01:54:17,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 01:54:17,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 01:54:17,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 01:54:17,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 01:54:17,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:54:16" (1/3) ... [2021-08-26 01:54:17,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abdb94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:54:17, skipping insertion in model container [2021-08-26 01:54:17,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:17" (2/3) ... [2021-08-26 01:54:17,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abdb94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:54:17, skipping insertion in model container [2021-08-26 01:54:17,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:17" (3/3) ... [2021-08-26 01:54:17,491 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2021-08-26 01:54:17,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 01:54:17,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 01:54:17,528 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 01:54:17,532 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 01:54:17,533 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 01:54:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 01:54:17,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:17,546 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:17,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-08-26 01:54:17,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:17,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780499741] [2021-08-26 01:54:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:17,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:17,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 01:54:17,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780499741] [2021-08-26 01:54:17,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780499741] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:17,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:17,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 01:54:17,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763738726] [2021-08-26 01:54:17,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 01:54:17,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 01:54:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 01:54:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 01:54:17,680 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:17,694 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-08-26 01:54:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 01:54:17,696 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 01:54:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:17,701 INFO L225 Difference]: With dead ends: 62 [2021-08-26 01:54:17,702 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 01:54:17,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 01:54:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 01:54:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-26 01:54:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-08-26 01:54:17,730 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-08-26 01:54:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:17,731 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-08-26 01:54:17,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-08-26 01:54:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 01:54:17,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:17,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:17,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 01:54:17,733 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:17,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-08-26 01:54:17,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:17,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984328539] [2021-08-26 01:54:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:17,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:17,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 01:54:17,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984328539] [2021-08-26 01:54:17,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984328539] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:17,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:17,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 01:54:17,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972865901] [2021-08-26 01:54:17,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 01:54:17,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 01:54:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 01:54:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:17,845 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:17,915 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-08-26 01:54:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 01:54:17,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 01:54:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:17,918 INFO L225 Difference]: With dead ends: 53 [2021-08-26 01:54:17,918 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 01:54:17,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 01:54:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 01:54:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-08-26 01:54:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-08-26 01:54:17,927 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-08-26 01:54:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:17,927 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-08-26 01:54:17,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-08-26 01:54:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 01:54:17,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:17,928 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:17,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 01:54:17,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-08-26 01:54:17,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:17,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347209384] [2021-08-26 01:54:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:17,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:17,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 01:54:17,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347209384] [2021-08-26 01:54:17,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347209384] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:17,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:17,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 01:54:17,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775866076] [2021-08-26 01:54:17,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 01:54:17,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 01:54:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 01:54:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:17,997 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:18,043 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-08-26 01:54:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 01:54:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 01:54:18,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:18,045 INFO L225 Difference]: With dead ends: 55 [2021-08-26 01:54:18,045 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 01:54:18,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 01:54:18,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 01:54:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-08-26 01:54:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-08-26 01:54:18,048 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2021-08-26 01:54:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:18,065 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-08-26 01:54:18,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-08-26 01:54:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 01:54:18,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:18,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:18,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 01:54:18,066 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-08-26 01:54:18,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:18,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014952135] [2021-08-26 01:54:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:18,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:18,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 01:54:18,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014952135] [2021-08-26 01:54:18,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014952135] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:18,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:18,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 01:54:18,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759417910] [2021-08-26 01:54:18,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 01:54:18,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 01:54:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 01:54:18,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:18,103 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:18,159 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-08-26 01:54:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 01:54:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 01:54:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:18,160 INFO L225 Difference]: With dead ends: 57 [2021-08-26 01:54:18,160 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 01:54:18,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 01:54:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 01:54:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-08-26 01:54:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-08-26 01:54:18,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2021-08-26 01:54:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:18,164 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-08-26 01:54:18,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-08-26 01:54:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 01:54:18,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:18,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:18,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 01:54:18,165 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2021-08-26 01:54:18,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:18,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628117921] [2021-08-26 01:54:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:18,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:18,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 01:54:18,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628117921] [2021-08-26 01:54:18,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628117921] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:18,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:18,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 01:54:18,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752929427] [2021-08-26 01:54:18,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 01:54:18,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 01:54:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 01:54:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:18,229 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:18,278 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-08-26 01:54:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 01:54:18,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 01:54:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:18,280 INFO L225 Difference]: With dead ends: 55 [2021-08-26 01:54:18,280 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 01:54:18,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 01:54:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 01:54:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-08-26 01:54:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-08-26 01:54:18,284 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2021-08-26 01:54:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:18,285 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-08-26 01:54:18,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-08-26 01:54:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 01:54:18,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:18,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:18,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 01:54:18,286 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:18,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-08-26 01:54:18,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:18,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861885638] [2021-08-26 01:54:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:18,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 01:54:18,304 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 01:54:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 01:54:18,332 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 01:54:18,332 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 01:54:18,333 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 01:54:18,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-26 01:54:18,339 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 01:54:18,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:54:18 BoogieIcfgContainer [2021-08-26 01:54:18,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 01:54:18,357 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 01:54:18,357 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 01:54:18,357 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 01:54:18,357 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:17" (3/4) ... [2021-08-26 01:54:18,359 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 01:54:18,359 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 01:54:18,361 INFO L168 Benchmark]: Toolchain (without parser) took 1496.92 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 41.3 MB in the beginning and 50.1 MB in the end (delta: -8.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:18,361 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 60.8 MB. Free memory was 42.7 MB in the beginning and 42.6 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:18,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.19 ms. Allocated memory is still 60.8 MB. Free memory was 41.1 MB in the beginning and 45.1 MB in the end (delta: -3.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:18,362 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.61 ms. Allocated memory is still 60.8 MB. Free memory was 45.0 MB in the beginning and 43.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:18,362 INFO L168 Benchmark]: Boogie Preprocessor took 17.32 ms. Allocated memory is still 60.8 MB. Free memory was 43.3 MB in the beginning and 42.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:18,363 INFO L168 Benchmark]: RCFGBuilder took 383.99 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 42.0 MB in the beginning and 60.7 MB in the end (delta: -18.7 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:18,363 INFO L168 Benchmark]: TraceAbstraction took 870.07 ms. Allocated memory is still 79.7 MB. Free memory was 60.0 MB in the beginning and 50.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:18,363 INFO L168 Benchmark]: Witness Printer took 2.44 ms. Allocated memory is still 79.7 MB. Free memory is still 50.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:18,365 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 60.8 MB. Free memory was 42.7 MB in the beginning and 42.6 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 169.19 ms. Allocated memory is still 60.8 MB. Free memory was 41.1 MB in the beginning and 45.1 MB in the end (delta: -3.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.61 ms. Allocated memory is still 60.8 MB. Free memory was 45.0 MB in the beginning and 43.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.32 ms. Allocated memory is still 60.8 MB. Free memory was 43.3 MB in the beginning and 42.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 383.99 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 42.0 MB in the beginning and 60.7 MB in the end (delta: -18.7 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 870.07 ms. Allocated memory is still 79.7 MB. Free memory was 60.0 MB in the beginning and 50.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Witness Printer took 2.44 ms. Allocated memory is still 79.7 MB. Free memory is still 50.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 810.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 8.4ms, AutomataDifference: 266.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 120.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 19.1ms SsaConstructionTime, 96.4ms SatisfiabilityAnalysisTime, 215.7ms InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 71 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 01:54:18,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 01:54:19,953 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-08-26 01:54:20,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 01:54:20,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 01:54:20,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 01:54:20,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 01:54:20,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 01:54:20,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 01:54:20,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 01:54:20,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 01:54:20,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 01:54:20,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 01:54:20,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 01:54:20,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 01:54:20,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 01:54:20,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 01:54:20,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 01:54:20,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 01:54:20,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 01:54:20,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 01:54:20,084 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 01:54:20,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 01:54:20,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 01:54:20,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 01:54:20,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 01:54:20,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 01:54:20,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 01:54:20,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 01:54:20,086 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 01:54:20,086 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 01:54:20,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 01:54:20,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 01:54:20,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 01:54:20,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 01:54:20,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 01:54:20,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 01:54:20,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 01:54:20,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 01:54:20,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 01:54:20,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 01:54:20,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 01:54:20,088 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 01:54:20,088 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 01:54:20,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 01:54:20,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 01:54:20,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 01:54:20,089 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2021-08-26 01:54:20,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 01:54:20,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 01:54:20,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 01:54:20,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 01:54:20,365 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 01:54:20,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-08-26 01:54:20,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1fc54ec/9aad6f1ff6be471a92b6dd7dae4d5d1d/FLAG96aee3a1a [2021-08-26 01:54:20,749 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 01:54:20,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-08-26 01:54:20,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1fc54ec/9aad6f1ff6be471a92b6dd7dae4d5d1d/FLAG96aee3a1a [2021-08-26 01:54:21,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b1fc54ec/9aad6f1ff6be471a92b6dd7dae4d5d1d [2021-08-26 01:54:21,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 01:54:21,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 01:54:21,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 01:54:21,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 01:54:21,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 01:54:21,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db30eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21, skipping insertion in model container [2021-08-26 01:54:21,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 01:54:21,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 01:54:21,295 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-08-26 01:54:21,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 01:54:21,306 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 01:54:21,335 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-08-26 01:54:21,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 01:54:21,353 INFO L208 MainTranslator]: Completed translation [2021-08-26 01:54:21,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21 WrapperNode [2021-08-26 01:54:21,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 01:54:21,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 01:54:21,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 01:54:21,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 01:54:21,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 01:54:21,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 01:54:21,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 01:54:21,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 01:54:21,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 01:54:21,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 01:54:21,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 01:54:21,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 01:54:21,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (1/1) ... [2021-08-26 01:54:21,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 01:54:21,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 01:54:21,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 01:54:21,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 01:54:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 01:54:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 01:54:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 01:54:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 01:54:21,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 01:54:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-08-26 01:54:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 01:54:21,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 01:54:21,838 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-08-26 01:54:21,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:21 BoogieIcfgContainer [2021-08-26 01:54:21,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 01:54:21,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 01:54:21,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 01:54:21,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 01:54:21,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:54:21" (1/3) ... [2021-08-26 01:54:21,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39be8111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:54:21, skipping insertion in model container [2021-08-26 01:54:21,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:21" (2/3) ... [2021-08-26 01:54:21,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39be8111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:54:21, skipping insertion in model container [2021-08-26 01:54:21,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:21" (3/3) ... [2021-08-26 01:54:21,844 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2021-08-26 01:54:21,863 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 01:54:21,863 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 01:54:21,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 01:54:21,894 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 01:54:21,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 01:54:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 01:54:21,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:21,924 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:21,924 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:21,928 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-08-26 01:54:21,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:21,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244890495] [2021-08-26 01:54:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:21,940 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:21,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:21,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:21,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 01:54:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 01:54:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:22,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:22,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:22,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244890495] [2021-08-26 01:54:22,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244890495] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:22,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:22,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 01:54:22,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872512267] [2021-08-26 01:54:22,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 01:54:22,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 01:54:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 01:54:22,186 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:22,200 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-08-26 01:54:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 01:54:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 01:54:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:22,207 INFO L225 Difference]: With dead ends: 62 [2021-08-26 01:54:22,207 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 01:54:22,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 01:54:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 01:54:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-26 01:54:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-08-26 01:54:22,236 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-08-26 01:54:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:22,236 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-08-26 01:54:22,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-08-26 01:54:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 01:54:22,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:22,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:22,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-26 01:54:22,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:22,455 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-08-26 01:54:22,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:22,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349823069] [2021-08-26 01:54:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:22,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:22,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:22,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:22,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 01:54:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:22,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 01:54:22,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:22,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:22,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:22,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349823069] [2021-08-26 01:54:22,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349823069] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:22,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:22,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-08-26 01:54:22,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649029769] [2021-08-26 01:54:22,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 01:54:22,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 01:54:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 01:54:22,663 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:22,758 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-08-26 01:54:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 01:54:22,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 01:54:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:22,762 INFO L225 Difference]: With dead ends: 68 [2021-08-26 01:54:22,763 INFO L226 Difference]: Without dead ends: 59 [2021-08-26 01:54:22,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 01:54:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-26 01:54:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-08-26 01:54:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-08-26 01:54:22,775 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-08-26 01:54:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:22,778 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-08-26 01:54:22,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-08-26 01:54:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 01:54:22,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:22,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:22,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 01:54:22,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:22,990 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:22,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:22,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-08-26 01:54:22,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:22,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066295922] [2021-08-26 01:54:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:22,992 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:22,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:22,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:22,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 01:54:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:23,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 01:54:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:23,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:23,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:23,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066295922] [2021-08-26 01:54:23,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066295922] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:23,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:23,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-26 01:54:23,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634356001] [2021-08-26 01:54:23,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 01:54:23,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:23,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 01:54:23,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:23,209 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:23,245 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-08-26 01:54:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 01:54:23,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 01:54:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:23,246 INFO L225 Difference]: With dead ends: 52 [2021-08-26 01:54:23,246 INFO L226 Difference]: Without dead ends: 26 [2021-08-26 01:54:23,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 01:54:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-26 01:54:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-26 01:54:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-08-26 01:54:23,248 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-08-26 01:54:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:23,249 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-08-26 01:54:23,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-08-26 01:54:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 01:54:23,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:23,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:23,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 01:54:23,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:23,459 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-08-26 01:54:23,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:23,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148256748] [2021-08-26 01:54:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:23,461 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:23,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:23,462 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:23,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-26 01:54:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 01:54:23,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:23,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:23,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:23,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148256748] [2021-08-26 01:54:23,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148256748] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:23,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-08-26 01:54:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861840697] [2021-08-26 01:54:23,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 01:54:23,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 01:54:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 01:54:23,624 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:23,667 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-08-26 01:54:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 01:54:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 01:54:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:23,669 INFO L225 Difference]: With dead ends: 61 [2021-08-26 01:54:23,669 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 01:54:23,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 01:54:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 01:54:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-08-26 01:54:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-08-26 01:54:23,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-08-26 01:54:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:23,673 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-08-26 01:54:23,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:23,673 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-08-26 01:54:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 01:54:23,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:23,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:23,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-26 01:54:23,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:23,877 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:23,877 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-08-26 01:54:23,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:23,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400600086] [2021-08-26 01:54:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:23,878 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:23,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:23,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-26 01:54:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:23,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 01:54:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:24,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:24,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:24,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400600086] [2021-08-26 01:54:24,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400600086] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:24,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:24,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-08-26 01:54:24,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581751366] [2021-08-26 01:54:24,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 01:54:24,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 01:54:24,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:24,148 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:24,160 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-08-26 01:54:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 01:54:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 01:54:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:24,162 INFO L225 Difference]: With dead ends: 38 [2021-08-26 01:54:24,162 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 01:54:24,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 01:54:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-26 01:54:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-08-26 01:54:24,165 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-08-26 01:54:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:24,165 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-08-26 01:54:24,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-08-26 01:54:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 01:54:24,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:24,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:24,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-26 01:54:24,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:24,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:24,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:24,376 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-08-26 01:54:24,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:24,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985317112] [2021-08-26 01:54:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:24,377 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:24,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:24,378 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:24,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-26 01:54:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:24,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 01:54:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:24,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:24,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:24,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985317112] [2021-08-26 01:54:24,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985317112] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:24,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:24,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-08-26 01:54:24,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533423774] [2021-08-26 01:54:24,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 01:54:24,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:24,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 01:54:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-26 01:54:24,638 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:24,701 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-08-26 01:54:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 01:54:24,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 01:54:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:24,702 INFO L225 Difference]: With dead ends: 40 [2021-08-26 01:54:24,702 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 01:54:24,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-26 01:54:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 01:54:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-08-26 01:54:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-08-26 01:54:24,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-08-26 01:54:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:24,705 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-08-26 01:54:24,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-08-26 01:54:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 01:54:24,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:24,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:24,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-26 01:54:24,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:24,914 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-08-26 01:54:24,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:24,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257140144] [2021-08-26 01:54:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:24,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:24,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:24,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-26 01:54:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 01:54:25,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:25,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:25,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:25,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257140144] [2021-08-26 01:54:25,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257140144] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:25,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:25,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-26 01:54:25,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682523094] [2021-08-26 01:54:25,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 01:54:25,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:25,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 01:54:25,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 01:54:25,167 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:25,191 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-08-26 01:54:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 01:54:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 01:54:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:25,198 INFO L225 Difference]: With dead ends: 43 [2021-08-26 01:54:25,199 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 01:54:25,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 01:54:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 01:54:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-26 01:54:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-08-26 01:54:25,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-08-26 01:54:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:25,206 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-08-26 01:54:25,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-08-26 01:54:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 01:54:25,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:25,207 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:25,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-26 01:54:25,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:25,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-08-26 01:54:25,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:25,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996455986] [2021-08-26 01:54:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:25,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:25,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:25,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:25,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-26 01:54:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 01:54:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:25,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 01:54:26,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:26,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996455986] [2021-08-26 01:54:26,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996455986] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:26,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:26,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-08-26 01:54:26,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928434121] [2021-08-26 01:54:26,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 01:54:26,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 01:54:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-26 01:54:26,034 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:26,166 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2021-08-26 01:54:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 01:54:26,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-26 01:54:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:26,168 INFO L225 Difference]: With dead ends: 23 [2021-08-26 01:54:26,168 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 01:54:26,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-26 01:54:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 01:54:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 01:54:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 01:54:26,169 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-08-26 01:54:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:26,169 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 01:54:26,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 01:54:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 01:54:26,169 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 01:54:26,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 01:54:26,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-08-26 01:54:26,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:26,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 01:54:26,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 01:54:26,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 01:54:26,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 01:54:26,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 01:54:26,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 01:54:26,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 01:54:26,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 01:54:26,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 01:54:26,543 INFO L860 garLoopResultBuilder]: At program point L85(lines 67 86) the Hoare annotation is: true [2021-08-26 01:54:26,544 INFO L857 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2021-08-26 01:54:26,544 INFO L857 garLoopResultBuilder]: For program point L52-2(line 52) no Hoare annotation was computed. [2021-08-26 01:54:26,544 INFO L853 garLoopResultBuilder]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_#res| (_ +zero 8 24)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24))) [2021-08-26 01:54:26,544 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 01:54:26,544 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 01:54:26,544 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 47) no Hoare annotation was computed. [2021-08-26 01:54:26,544 INFO L857 garLoopResultBuilder]: For program point L38(lines 38 41) no Hoare annotation was computed. [2021-08-26 01:54:26,545 INFO L857 garLoopResultBuilder]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2021-08-26 01:54:26,545 INFO L857 garLoopResultBuilder]: For program point L80(line 80) no Hoare annotation was computed. [2021-08-26 01:54:26,545 INFO L857 garLoopResultBuilder]: For program point L80-2(lines 80 83) no Hoare annotation was computed. [2021-08-26 01:54:26,545 INFO L853 garLoopResultBuilder]: At program point L64(lines 55 65) the Hoare annotation is: (and (= (_ +zero 8 24) (fp ((_ extract 31 31) ULTIMATE.start___signbit_float_~w~1) ((_ extract 30 23) ULTIMATE.start___signbit_float_~w~1) ((_ extract 22 0) ULTIMATE.start___signbit_float_~w~1))) |ULTIMATE.start_main_#t~short14| (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_#res| (_ +zero 8 24)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x) (= |ULTIMATE.start___signbit_float_#res| (_ bv0 32))) [2021-08-26 01:54:26,545 INFO L857 garLoopResultBuilder]: For program point L81(line 81) no Hoare annotation was computed. [2021-08-26 01:54:26,545 INFO L857 garLoopResultBuilder]: For program point L32(lines 32 41) no Hoare annotation was computed. [2021-08-26 01:54:26,545 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 01:54:26,545 INFO L857 garLoopResultBuilder]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2021-08-26 01:54:26,545 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 81) no Hoare annotation was computed. [2021-08-26 01:54:26,546 INFO L857 garLoopResultBuilder]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2021-08-26 01:54:26,546 INFO L853 garLoopResultBuilder]: At program point L24-2(lines 24 28) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmax_float_~x .cse0) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= .cse0 ULTIMATE.start___fpclassify_float_~x))) [2021-08-26 01:54:26,546 INFO L857 garLoopResultBuilder]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2021-08-26 01:54:26,546 INFO L857 garLoopResultBuilder]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2021-08-26 01:54:26,546 INFO L853 garLoopResultBuilder]: At program point L24-6(lines 24 28) the Hoare annotation is: (and (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2021-08-26 01:54:26,546 INFO L857 garLoopResultBuilder]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2021-08-26 01:54:26,546 INFO L857 garLoopResultBuilder]: For program point L49(lines 49 51) no Hoare annotation was computed. [2021-08-26 01:54:26,546 INFO L853 garLoopResultBuilder]: At program point L41(lines 21 42) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start_fmax_float_~x .cse0) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= .cse0 ULTIMATE.start___fpclassify_float_~x))) [2021-08-26 01:54:26,546 INFO L853 garLoopResultBuilder]: At program point L41-1(lines 21 42) the Hoare annotation is: (and (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|))) [2021-08-26 01:54:26,547 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 01:54:26,547 INFO L857 garLoopResultBuilder]: For program point L58-1(lines 58 62) no Hoare annotation was computed. [2021-08-26 01:54:26,547 INFO L853 garLoopResultBuilder]: At program point L58-2(lines 58 62) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short14| (= ULTIMATE.start___fpclassify_float_~x (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_#res| (_ +zero 8 24)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x)) [2021-08-26 01:54:26,547 INFO L857 garLoopResultBuilder]: For program point L58-3(lines 58 62) no Hoare annotation was computed. [2021-08-26 01:54:26,547 INFO L857 garLoopResultBuilder]: For program point L35(lines 35 41) no Hoare annotation was computed. [2021-08-26 01:54:26,547 INFO L857 garLoopResultBuilder]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2021-08-26 01:54:26,550 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 01:54:26,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:54:26 BoogieIcfgContainer [2021-08-26 01:54:26,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 01:54:26,561 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 01:54:26,561 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 01:54:26,561 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 01:54:26,561 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:21" (3/4) ... [2021-08-26 01:54:26,564 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 01:54:26,570 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-08-26 01:54:26,571 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-26 01:54:26,571 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-26 01:54:26,571 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 01:54:26,585 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && y == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x [2021-08-26 01:54:26,586 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE() [2021-08-26 01:54:26,586 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == res) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x [2021-08-26 01:54:26,586 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && !(0bv32 == \result) [2021-08-26 01:54:26,586 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && aux-res == 0.0f && __signbit_float(res) == 0-aux) && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == res) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && \result == 0bv32 [2021-08-26 01:54:26,595 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 01:54:26,595 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 01:54:26,596 INFO L168 Benchmark]: Toolchain (without parser) took 5413.99 ms. Allocated memory was 52.4 MB in the beginning and 96.5 MB in the end (delta: 44.0 MB). Free memory was 29.9 MB in the beginning and 45.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 28.0 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:26,599 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 52.4 MB. Free memory was 33.6 MB in the beginning and 33.6 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:26,599 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.37 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 29.7 MB in the beginning and 49.1 MB in the end (delta: -19.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:26,600 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.08 ms. Allocated memory is still 65.0 MB. Free memory was 49.1 MB in the beginning and 47.1 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:26,600 INFO L168 Benchmark]: Boogie Preprocessor took 51.75 ms. Allocated memory is still 65.0 MB. Free memory was 47.1 MB in the beginning and 45.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:26,600 INFO L168 Benchmark]: RCFGBuilder took 373.96 ms. Allocated memory is still 65.0 MB. Free memory was 45.6 MB in the beginning and 42.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:26,601 INFO L168 Benchmark]: TraceAbstraction took 4719.83 ms. Allocated memory was 65.0 MB in the beginning and 96.5 MB in the end (delta: 31.5 MB). Free memory was 42.3 MB in the beginning and 49.0 MB in the end (delta: -6.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:26,601 INFO L168 Benchmark]: Witness Printer took 34.75 ms. Allocated memory is still 96.5 MB. Free memory was 49.0 MB in the beginning and 45.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:26,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 52.4 MB. Free memory was 33.6 MB in the beginning and 33.6 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.37 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 29.7 MB in the beginning and 49.1 MB in the end (delta: -19.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.08 ms. Allocated memory is still 65.0 MB. Free memory was 49.1 MB in the beginning and 47.1 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.75 ms. Allocated memory is still 65.0 MB. Free memory was 47.1 MB in the beginning and 45.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 373.96 ms. Allocated memory is still 65.0 MB. Free memory was 45.6 MB in the beginning and 42.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4719.83 ms. Allocated memory was 65.0 MB in the beginning and 96.5 MB in the end (delta: 31.5 MB). Free memory was 42.3 MB in the beginning and 49.0 MB in the end (delta: -6.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. * Witness Printer took 34.75 ms. Allocated memory is still 96.5 MB. Free memory was 49.0 MB in the beginning and 45.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 81]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4660.9ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 27.6ms, AutomataDifference: 466.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 163.6ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 234 SDtfs, 203 SDslu, 403 SDs, 0 SdLazy, 147 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 157.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 437.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.3ms AutomataMinimizationTime, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 16 NumberOfFragments, 168 HoareAnnotationTreeSize, 8 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 52.0ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 106.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 80.3ms SsaConstructionTime, 174.7ms SatisfiabilityAnalysisTime, 1505.8ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 818 SizeOfPredicates, 38 NumberOfNonLiveVariables, 493 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && y == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && y == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: ((((((((~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && aux-res == 0.0f && __signbit_float(res) == 0-aux) && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == res) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && \result == 0bv32 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == res) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && \result == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && !(0bv32 == \result) RESULT: Ultimate proved your program to be correct! [2021-08-26 01:54:26,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...