./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1231b.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 51c288f40d68a666851060907ab6bc13e9c502d2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1231b.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 51c288f40d68a666851060907ab6bc13e9c502d2 .................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:33:17,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:33:17,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:33:17,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:33:17,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:33:17,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:33:17,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:33:17,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:33:17,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:33:17,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:33:17,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:33:17,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:33:17,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:33:17,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:33:17,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:33:17,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:33:17,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:33:17,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:33:17,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:33:17,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:33:17,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:33:17,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:33:17,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:33:17,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:33:17,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:33:17,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:33:17,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:33:17,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:33:17,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:33:17,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:33:17,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:33:17,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:33:17,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:33:17,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:33:17,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:33:17,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:33:17,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:33:17,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:33:17,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:33:17,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:33:17,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:33:17,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:33:17,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:33:17,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:33:17,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:33:17,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:33:17,854 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:33:17,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:33:17,855 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:33:17,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:33:17,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:33:17,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:33:17,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:33:17,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:33:17,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:33:17,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:33:17,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:33:17,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:33:17,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:33:17,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:33:17,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:33:17,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:33:17,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:33:17,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:17,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:33:17,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:33:17,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:33:17,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:33:17,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:33:17,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:33:17,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:33:17,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(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 -> 51c288f40d68a666851060907ab6bc13e9c502d2 [2020-10-20 00:33:18,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:33:18,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:33:18,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:33:18,104 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:33:18,104 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:33:18,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-20 00:33:18,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43b44418/009a71e4eb4b43d3b63498e5bf7a212a/FLAG7e18371d3 [2020-10-20 00:33:18,619 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:33:18,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-20 00:33:18,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43b44418/009a71e4eb4b43d3b63498e5bf7a212a/FLAG7e18371d3 [2020-10-20 00:33:19,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43b44418/009a71e4eb4b43d3b63498e5bf7a212a [2020-10-20 00:33:19,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:33:19,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:33:19,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:19,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:33:19,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:33:19,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4303dd08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19, skipping insertion in model container [2020-10-20 00:33:19,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:33:19,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:33:19,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:19,334 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:33:19,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:19,380 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:33:19,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19 WrapperNode [2020-10-20 00:33:19,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:19,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:19,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:33:19,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:33:19,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:19,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:33:19,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:33:19,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:33:19,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... [2020-10-20 00:33:19,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:33:19,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:33:19,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:33:19,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:33:19,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:33:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:33:19,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:33:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:33:19,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:33:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:33:19,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:33:19,934 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:33:19,934 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 00:33:19,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:19 BoogieIcfgContainer [2020-10-20 00:33:19,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:33:19,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:33:19,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:33:19,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:33:19,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:33:19" (1/3) ... [2020-10-20 00:33:19,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef37fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:19, skipping insertion in model container [2020-10-20 00:33:19,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:19" (2/3) ... [2020-10-20 00:33:19,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef37fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:19, skipping insertion in model container [2020-10-20 00:33:19,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:19" (3/3) ... [2020-10-20 00:33:19,954 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1231b.c [2020-10-20 00:33:19,970 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:33:19,978 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:33:19,989 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:33:20,012 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:33:20,012 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:33:20,013 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:33:20,013 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:33:20,013 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:33:20,013 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:33:20,013 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:33:20,014 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:33:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-20 00:33:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:33:20,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:20,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:20,039 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-10-20 00:33:20,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:20,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884067188] [2020-10-20 00:33:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:20,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884067188] [2020-10-20 00:33:20,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:20,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:33:20,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671345489] [2020-10-20 00:33:20,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:33:20,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:33:20,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:20,225 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-20 00:33:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:20,246 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-20 00:33:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:33:20,248 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-20 00:33:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:20,260 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:33:20,260 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:33:20,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:33:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 00:33:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:33:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-20 00:33:20,319 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-10-20 00:33:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:20,320 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-20 00:33:20,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:33:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-20 00:33:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:33:20,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:20,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:20,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:33:20,323 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-10-20 00:33:20,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:20,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229108341] [2020-10-20 00:33:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:20,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229108341] [2020-10-20 00:33:20,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:20,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:20,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659980090] [2020-10-20 00:33:20,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:20,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:20,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:20,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:20,439 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-10-20 00:33:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:20,504 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-20 00:33:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:20,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 00:33:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:20,506 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:33:20,506 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 00:33:20,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:33:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 00:33:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-20 00:33:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:20,517 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-10-20 00:33:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:20,517 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:20,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:33:20,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:20,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:20,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:33:20,520 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-10-20 00:33:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:20,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834683308] [2020-10-20 00:33:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:20,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834683308] [2020-10-20 00:33:20,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:20,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:20,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295935569] [2020-10-20 00:33:20,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:20,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:20,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:20,596 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-20 00:33:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:20,661 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-20 00:33:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:20,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 00:33:20,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:20,663 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:33:20,663 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:33:20,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:33:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:33:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-20 00:33:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:20,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-10-20 00:33:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:20,670 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:20,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:33:20,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:20,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:20,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:33:20,672 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-10-20 00:33:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:20,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507362804] [2020-10-20 00:33:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:20,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507362804] [2020-10-20 00:33:20,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:20,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:20,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874972594] [2020-10-20 00:33:20,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:20,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:20,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:20,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:20,748 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-20 00:33:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:20,809 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-10-20 00:33:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:20,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:33:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:20,811 INFO L225 Difference]: With dead ends: 44 [2020-10-20 00:33:20,811 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 00:33:20,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:33:20,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 00:33:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-10-20 00:33:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:20,817 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-10-20 00:33:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:20,818 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:20,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:33:20,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:20,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:20,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:33:20,820 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-10-20 00:33:20,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:20,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312841470] [2020-10-20 00:33:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:20,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312841470] [2020-10-20 00:33:20,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:20,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:20,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449932343] [2020-10-20 00:33:20,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:20,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:20,920 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-20 00:33:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:20,981 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-20 00:33:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:20,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-20 00:33:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:20,983 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:33:20,983 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:33:20,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:33:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:33:20,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-20 00:33:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:20,989 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-10-20 00:33:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:20,990 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:20,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:33:20,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:20,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:20,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:33:20,991 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-10-20 00:33:20,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:20,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365130051] [2020-10-20 00:33:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:21,020 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:21,042 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:21,070 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:33:21,070 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:33:21,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:33:21,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:33:21 BoogieIcfgContainer [2020-10-20 00:33:21,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:33:21,117 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:33:21,118 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:33:21,118 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:33:21,119 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:19" (3/4) ... [2020-10-20 00:33:21,122 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:33:21,123 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:33:21,126 INFO L168 Benchmark]: Toolchain (without parser) took 2114.35 ms. Allocated memory was 36.7 MB in the beginning and 50.3 MB in the end (delta: 13.6 MB). Free memory was 14.0 MB in the beginning and 31.0 MB in the end (delta: -17.0 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:33:21,129 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 34.1 MB. Free memory was 19.3 MB in the beginning and 19.3 MB in the end (delta: 29.0 kB). Peak memory consumption was 29.0 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:21,131 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.71 ms. Allocated memory was 36.7 MB in the beginning and 44.6 MB in the end (delta: 7.9 MB). Free memory was 13.1 MB in the beginning and 23.1 MB in the end (delta: -10.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:21,137 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.37 ms. Allocated memory is still 44.6 MB. Free memory was 23.1 MB in the beginning and 21.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:21,138 INFO L168 Benchmark]: Boogie Preprocessor took 30.35 ms. Allocated memory is still 44.6 MB. Free memory was 21.0 MB in the beginning and 19.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:21,139 INFO L168 Benchmark]: RCFGBuilder took 478.59 ms. Allocated memory was 44.6 MB in the beginning and 47.2 MB in the end (delta: 2.6 MB). Free memory was 19.3 MB in the beginning and 11.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:21,141 INFO L168 Benchmark]: TraceAbstraction took 1179.37 ms. Allocated memory was 47.2 MB in the beginning and 50.3 MB in the end (delta: 3.1 MB). Free memory was 11.2 MB in the beginning and 31.4 MB in the end (delta: -20.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:21,145 INFO L168 Benchmark]: Witness Printer took 5.55 ms. Allocated memory is still 50.3 MB. Free memory was 31.4 MB in the beginning and 31.0 MB in the end (delta: 391.7 kB). Peak memory consumption was 391.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:21,161 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 34.1 MB. Free memory was 19.3 MB in the beginning and 19.3 MB in the end (delta: 29.0 kB). Peak memory consumption was 29.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 363.71 ms. Allocated memory was 36.7 MB in the beginning and 44.6 MB in the end (delta: 7.9 MB). Free memory was 13.1 MB in the beginning and 23.1 MB in the end (delta: -10.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 45.37 ms. Allocated memory is still 44.6 MB. Free memory was 23.1 MB in the beginning and 21.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 30.35 ms. Allocated memory is still 44.6 MB. Free memory was 21.0 MB in the beginning and 19.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 478.59 ms. Allocated memory was 44.6 MB in the beginning and 47.2 MB in the end (delta: 2.6 MB). Free memory was 19.3 MB in the beginning and 11.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1179.37 ms. Allocated memory was 47.2 MB in the beginning and 50.3 MB in the end (delta: 3.1 MB). Free memory was 11.2 MB in the beginning and 31.4 MB in the end (delta: -20.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. * Witness Printer took 5.55 ms. Allocated memory is still 50.3 MB. Free memory was 31.4 MB in the beginning and 31.0 MB in the end (delta: 391.7 kB). Peak memory consumption was 391.7 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 69, overapproximation of someBinaryArithmeticDOUBLEoperation at line 63. Possible FailurePath: [L62] double x = __VERIFIER_nondet_double(); [L63] double y = 0.0 / 0.0; [L18] return x != x; [L64] COND TRUE !isnan_double(x) [L20] __uint32_t msw, lsw; [L23] ieee_double_shape_type ew_u; [L24] ew_u.value = (x) [L25] EXPR ew_u.parts.msw [L25] (msw) = ew_u.parts.msw [L26] EXPR ew_u.parts.lsw [L26] (lsw) = ew_u.parts.lsw [L29-L30] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L32-L33] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L35-L36] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L39-L40] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L43] return 0; [L47] COND TRUE __fpclassify_double(x) == 0 [L48] return y; [L66] double res = fmin_double(x, y); [L69] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1231b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 40 SDslu, 242 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:33:23,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:33:23,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:33:23,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:33:23,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:33:23,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:33:23,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:33:23,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:33:23,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:33:23,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:33:23,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:33:23,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:33:23,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:33:23,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:33:23,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:33:23,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:33:23,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:33:23,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:33:23,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:33:23,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:33:23,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:33:23,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:33:23,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:33:23,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:33:23,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:33:23,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:33:23,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:33:23,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:33:23,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:33:23,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:33:23,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:33:23,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:33:23,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:33:23,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:33:23,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:33:23,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:33:23,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:33:23,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:33:23,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:33:23,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:33:23,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:33:23,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:33:23,637 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:33:23,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:33:23,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:33:23,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:33:23,640 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:33:23,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:33:23,641 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:33:23,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:33:23,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:33:23,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:33:23,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:33:23,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:33:23,643 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:33:23,643 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:33:23,644 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:33:23,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:33:23,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:33:23,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:33:23,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:33:23,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:33:23,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:33:23,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:33:23,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:23,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:33:23,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:33:23,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:33:23,647 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:33:23,647 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:33:23,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:33:23,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:33:23,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:33:23,648 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(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 -> 51c288f40d68a666851060907ab6bc13e9c502d2 [2020-10-20 00:33:23,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:33:23,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:33:23,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:33:23,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:33:23,867 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:33:23,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-20 00:33:23,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0f711dd2/fd154f4915a442a685dab50373608ffb/FLAGca39e9226 [2020-10-20 00:33:24,326 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:33:24,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-20 00:33:24,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0f711dd2/fd154f4915a442a685dab50373608ffb/FLAGca39e9226 [2020-10-20 00:33:24,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0f711dd2/fd154f4915a442a685dab50373608ffb [2020-10-20 00:33:24,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:33:24,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:33:24,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:24,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:33:24,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:33:24,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:24,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396ada42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24, skipping insertion in model container [2020-10-20 00:33:24,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:24,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:33:24,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:33:25,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:25,102 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:33:25,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:25,155 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:33:25,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25 WrapperNode [2020-10-20 00:33:25,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:25,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:25,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:33:25,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:33:25,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:25,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:33:25,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:33:25,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:33:25,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... [2020-10-20 00:33:25,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:33:25,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:33:25,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:33:25,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:33:25,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:25,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-20 00:33:25,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:33:25,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:33:25,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:33:25,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:33:25,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:33:25,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:33:25,852 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:33:25,852 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 00:33:25,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:25 BoogieIcfgContainer [2020-10-20 00:33:25,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:33:25,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:33:25,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:33:25,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:33:25,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:33:24" (1/3) ... [2020-10-20 00:33:25,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc67f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:25, skipping insertion in model container [2020-10-20 00:33:25,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:25" (2/3) ... [2020-10-20 00:33:25,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc67f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:25, skipping insertion in model container [2020-10-20 00:33:25,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:25" (3/3) ... [2020-10-20 00:33:25,871 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1231b.c [2020-10-20 00:33:25,884 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:33:25,891 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:33:25,906 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:33:25,930 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:33:25,930 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:33:25,931 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:33:25,931 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:33:25,931 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:33:25,931 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:33:25,931 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:33:25,932 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:33:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-20 00:33:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:33:25,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:25,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:25,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:25,956 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-10-20 00:33:25,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:25,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871288463] [2020-10-20 00:33:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:26,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:33:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:26,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:26,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871288463] [2020-10-20 00:33:26,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:26,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:33:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395669131] [2020-10-20 00:33:26,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:33:26,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:33:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:26,167 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-20 00:33:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:26,215 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-20 00:33:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:33:26,217 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-20 00:33:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:26,231 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:33:26,231 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:33:26,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:33:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 00:33:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:33:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-20 00:33:26,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-10-20 00:33:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:26,267 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-20 00:33:26,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:33:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-20 00:33:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:33:26,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:26,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:26,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:33:26,477 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:26,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-10-20 00:33:26,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:26,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150868622] [2020-10-20 00:33:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:33:26,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:26,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:26,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150868622] [2020-10-20 00:33:26,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:26,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:33:26,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230539070] [2020-10-20 00:33:26,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:33:26,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:33:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:33:26,691 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-10-20 00:33:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:26,967 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-10-20 00:33:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:33:26,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-20 00:33:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:26,970 INFO L225 Difference]: With dead ends: 50 [2020-10-20 00:33:26,970 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:33:26,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:33:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:33:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-10-20 00:33:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:26,988 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-10-20 00:33:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:26,989 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:26,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:33:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:33:26,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:26,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:27,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:33:27,209 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-10-20 00:33:27,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:27,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110311852] [2020-10-20 00:33:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:27,353 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:27,432 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:27,492 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:33:27,492 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:33:27,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:33:27,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:33:27 BoogieIcfgContainer [2020-10-20 00:33:27,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:33:27,734 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:33:27,734 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:33:27,735 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:33:27,735 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:25" (3/4) ... [2020-10-20 00:33:27,738 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:33:27,792 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:33:27,793 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:33:27,795 INFO L168 Benchmark]: Toolchain (without parser) took 3012.11 ms. Allocated memory was 36.2 MB in the beginning and 49.3 MB in the end (delta: 13.1 MB). Free memory was 19.6 MB in the beginning and 25.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 7.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:27,796 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 34.1 MB. Free memory was 12.4 MB in the beginning and 12.4 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:27,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.14 ms. Allocated memory was 36.2 MB in the beginning and 43.5 MB in the end (delta: 7.3 MB). Free memory was 18.8 MB in the beginning and 23.9 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:27,797 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.01 ms. Allocated memory is still 43.5 MB. Free memory was 23.8 MB in the beginning and 21.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:27,798 INFO L168 Benchmark]: Boogie Preprocessor took 42.68 ms. Allocated memory is still 43.5 MB. Free memory was 21.7 MB in the beginning and 20.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:27,799 INFO L168 Benchmark]: RCFGBuilder took 601.07 ms. Allocated memory was 43.5 MB in the beginning and 45.6 MB in the end (delta: 2.1 MB). Free memory was 19.9 MB in the beginning and 11.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:27,799 INFO L168 Benchmark]: TraceAbstraction took 1878.33 ms. Allocated memory was 45.6 MB in the beginning and 49.3 MB in the end (delta: 3.7 MB). Free memory was 10.6 MB in the beginning and 28.4 MB in the end (delta: -17.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:27,800 INFO L168 Benchmark]: Witness Printer took 58.42 ms. Allocated memory is still 49.3 MB. Free memory was 28.4 MB in the beginning and 25.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:27,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 34.1 MB. Free memory was 12.4 MB in the beginning and 12.4 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 368.14 ms. Allocated memory was 36.2 MB in the beginning and 43.5 MB in the end (delta: 7.3 MB). Free memory was 18.8 MB in the beginning and 23.9 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 53.01 ms. Allocated memory is still 43.5 MB. Free memory was 23.8 MB in the beginning and 21.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 42.68 ms. Allocated memory is still 43.5 MB. Free memory was 21.7 MB in the beginning and 20.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 601.07 ms. Allocated memory was 43.5 MB in the beginning and 45.6 MB in the end (delta: 2.1 MB). Free memory was 19.9 MB in the beginning and 11.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1878.33 ms. Allocated memory was 45.6 MB in the beginning and 49.3 MB in the end (delta: 3.7 MB). Free memory was 10.6 MB in the beginning and 28.4 MB in the end (delta: -17.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Witness Printer took 58.42 ms. Allocated memory is still 49.3 MB. Free memory was 28.4 MB in the beginning and 25.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L62] double x = __VERIFIER_nondet_double(); [L63] double y = 0.0 / 0.0; [L18] return x != x; [L64] COND TRUE !isnan_double(x) [L20] __uint32_t msw, lsw; [L23] ieee_double_shape_type ew_u; [L24] ew_u.value = (x) [L25] EXPR ew_u.parts.msw [L25] (msw) = ew_u.parts.msw [L26] EXPR ew_u.parts.lsw [L26] (lsw) = ew_u.parts.lsw [L29-L30] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L32-L33] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L35-L36] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L39-L40] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L43] return 0; [L47] COND TRUE __fpclassify_double(x) == 0 [L48] return y; [L66] double res = fmin_double(x, y); [L69] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1231b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 98 SDs, 0 SdLazy, 27 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...