./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1232a.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 588c8ae05db5b455b7a642d0c86b0e222c46f03c ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1232a.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 588c8ae05db5b455b7a642d0c86b0e222c46f03c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-10-24 23:26:53,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:26:53,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:26:54,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:26:54,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:26:54,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:26:54,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:26:54,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:26:54,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:26:54,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:26:54,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:26:54,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:26:54,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:26:54,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:26:54,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:26:54,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:26:54,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:26:54,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:26:54,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:26:54,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:26:54,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:26:54,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:26:54,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:26:54,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:26:54,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:26:54,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:26:54,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:26:54,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:26:54,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:26:54,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:26:54,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:26:54,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:26:54,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:26:54,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:26:54,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:26:54,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:26:54,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:26:54,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:26:54,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:26:54,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:26:54,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:26:54,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 23:26:54,121 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:26:54,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:26:54,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:26:54,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:26:54,124 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:26:54,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:26:54,125 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:26:54,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 23:26:54,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:26:54,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:26:54,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:26:54,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:26:54,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:26:54,127 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:26:54,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:26:54,128 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:26:54,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:26:54,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:26:54,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:26:54,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:26:54,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:26:54,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:26:54,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:26:54,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:26:54,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:26:54,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 23:26:54,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 23:26:54,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:26:54,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:26:54,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c8ae05db5b455b7a642d0c86b0e222c46f03c [2020-10-24 23:26:54,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:26:54,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:26:54,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:26:54,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:26:54,563 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:26:54,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2020-10-24 23:26:54,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f622626e/4b837d04659c455c95f130731d01cdcd/FLAG70dcf6f44 [2020-10-24 23:26:55,242 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:26:55,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2020-10-24 23:26:55,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f622626e/4b837d04659c455c95f130731d01cdcd/FLAG70dcf6f44 [2020-10-24 23:26:55,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f622626e/4b837d04659c455c95f130731d01cdcd [2020-10-24 23:26:55,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:26:55,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:26:55,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:26:55,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:26:55,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:26:55,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:55,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143ee75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55, skipping insertion in model container [2020-10-24 23:26:55,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:55,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:26:55,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:26:55,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:26:55,909 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:26:55,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:26:55,953 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:26:55,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55 WrapperNode [2020-10-24 23:26:55,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:26:55,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:26:55,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:26:55,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:26:55,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:55,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:56,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:26:56,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:26:56,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:26:56,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:26:56,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:56,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:56,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:56,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:56,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:56,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:56,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (1/1) ... [2020-10-24 23:26:56,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:26:56,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:26:56,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:26:56,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:26:56,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (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 [2020-10-24 23:26:56,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 23:26:56,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:26:56,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 23:26:56,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:26:56,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:26:56,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 23:26:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:26:56,762 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:26:56,762 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-24 23:26:56,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:26:56 BoogieIcfgContainer [2020-10-24 23:26:56,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:26:56,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:26:56,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:26:56,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:26:56,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:26:55" (1/3) ... [2020-10-24 23:26:56,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467c5502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:26:56, skipping insertion in model container [2020-10-24 23:26:56,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:55" (2/3) ... [2020-10-24 23:26:56,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467c5502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:26:56, skipping insertion in model container [2020-10-24 23:26:56,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:26:56" (3/3) ... [2020-10-24 23:26:56,778 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2020-10-24 23:26:56,791 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:26:56,796 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:26:56,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:26:56,857 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:26:56,858 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:26:56,858 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:26:56,858 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:26:56,859 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:26:56,859 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:26:56,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:26:56,860 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:26:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-24 23:26:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:26:56,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:56,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:56,888 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:56,895 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-24 23:26:56,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:56,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893304689] [2020-10-24 23:26:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:57,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893304689] [2020-10-24 23:26:57,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:57,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 23:26:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511863927] [2020-10-24 23:26:57,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:26:57,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:26:57,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:26:57,085 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-24 23:26:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:57,105 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-24 23:26:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:26:57,107 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:26:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:57,117 INFO L225 Difference]: With dead ends: 63 [2020-10-24 23:26:57,117 INFO L226 Difference]: Without dead ends: 29 [2020-10-24 23:26:57,121 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 [2020-10-24 23:26:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-24 23:26:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-24 23:26:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-24 23:26:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-24 23:26:57,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-24 23:26:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:57,153 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-24 23:26:57,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:26:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-24 23:26:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:26:57,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:57,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:57,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 23:26:57,155 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:57,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-24 23:26:57,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:57,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837837148] [2020-10-24 23:26:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:57,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837837148] [2020-10-24 23:26:57,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:57,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:26:57,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563045122] [2020-10-24 23:26:57,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:26:57,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:57,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:26:57,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:26:57,267 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-24 23:26:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:57,347 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-24 23:26:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:26:57,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-24 23:26:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:57,350 INFO L225 Difference]: With dead ends: 53 [2020-10-24 23:26:57,350 INFO L226 Difference]: Without dead ends: 44 [2020-10-24 23:26:57,351 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 [2020-10-24 23:26:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-24 23:26:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-24 23:26:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:26:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:26:57,358 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-24 23:26:57,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:57,359 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:26:57,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:26:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:26:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 23:26:57,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:57,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:57,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 23:26:57,361 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:57,362 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-24 23:26:57,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:57,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698712920] [2020-10-24 23:26:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:57,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698712920] [2020-10-24 23:26:57,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:57,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:26:57,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157207995] [2020-10-24 23:26:57,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:26:57,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:57,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:26:57,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:26:57,480 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:26:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:57,559 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-24 23:26:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:26:57,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-24 23:26:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:57,561 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:26:57,561 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 23:26:57,562 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 [2020-10-24 23:26:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 23:26:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-24 23:26:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:26:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:26:57,568 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-24 23:26:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:57,569 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:26:57,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:26:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:26:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-24 23:26:57,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:57,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:57,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 23:26:57,571 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-24 23:26:57,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:57,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81342769] [2020-10-24 23:26:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:57,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81342769] [2020-10-24 23:26:57,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:57,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:26:57,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126458047] [2020-10-24 23:26:57,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:26:57,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:57,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:26:57,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:26:57,627 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:26:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:57,740 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-24 23:26:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:26:57,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-24 23:26:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:57,742 INFO L225 Difference]: With dead ends: 57 [2020-10-24 23:26:57,743 INFO L226 Difference]: Without dead ends: 48 [2020-10-24 23:26:57,743 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 [2020-10-24 23:26:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-24 23:26:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-24 23:26:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:26:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:26:57,758 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-24 23:26:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:57,758 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:26:57,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:26:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:26:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:26:57,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:57,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:57,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 23:26:57,761 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:57,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:57,764 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-24 23:26:57,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:57,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707181802] [2020-10-24 23:26:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:57,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707181802] [2020-10-24 23:26:57,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:57,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:26:57,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468814094] [2020-10-24 23:26:57,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:26:57,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:57,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:26:57,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:26:57,860 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:26:57,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:57,926 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-24 23:26:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:26:57,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:26:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:57,928 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:26:57,928 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 23:26:57,928 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 [2020-10-24 23:26:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 23:26:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-24 23:26:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:26:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:26:57,934 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-24 23:26:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:57,934 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:26:57,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:26:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:26:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:26:57,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:57,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:57,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 23:26:57,936 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:57,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-24 23:26:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:57,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947979242] [2020-10-24 23:26:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:26:57,960 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:26:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:26:57,979 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:26:58,004 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 23:26:58,004 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:26:58,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 23:26:58,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:26:58 BoogieIcfgContainer [2020-10-24 23:26:58,039 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:26:58,040 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:26:58,040 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:26:58,040 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:26:58,041 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:26:56" (3/4) ... [2020-10-24 23:26:58,044 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 23:26:58,045 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:26:58,047 INFO L168 Benchmark]: Toolchain (without parser) took 2386.05 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.9 MB in the beginning and 24.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:58,048 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 37.7 MB. Free memory was 20.5 MB in the beginning and 20.5 MB in the end (delta: 26.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:26:58,049 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.28 ms. Allocated memory is still 48.2 MB. Free memory was 25.3 MB in the beginning and 26.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:58,050 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.05 ms. Allocated memory is still 48.2 MB. Free memory was 26.3 MB in the beginning and 24.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:58,051 INFO L168 Benchmark]: Boogie Preprocessor took 39.98 ms. Allocated memory is still 48.2 MB. Free memory was 24.6 MB in the beginning and 23.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:26:58,052 INFO L168 Benchmark]: RCFGBuilder took 722.94 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.1 MB in the beginning and 37.5 MB in the end (delta: -14.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:58,053 INFO L168 Benchmark]: TraceAbstraction took 1271.23 ms. Allocated memory is still 58.7 MB. Free memory was 37.0 MB in the beginning and 25.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:58,054 INFO L168 Benchmark]: Witness Printer took 5.05 ms. Allocated memory is still 58.7 MB. Free memory was 25.2 MB in the beginning and 24.8 MB in the end (delta: 351.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:26:58,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 37.7 MB. Free memory was 20.5 MB in the beginning and 20.5 MB in the end (delta: 26.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.28 ms. Allocated memory is still 48.2 MB. Free memory was 25.3 MB in the beginning and 26.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.05 ms. Allocated memory is still 48.2 MB. Free memory was 26.3 MB in the beginning and 24.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.98 ms. Allocated memory is still 48.2 MB. Free memory was 24.6 MB in the beginning and 23.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 722.94 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.1 MB in the beginning and 37.5 MB in the end (delta: -14.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1271.23 ms. Allocated memory is still 58.7 MB. Free memory was 37.0 MB in the beginning and 25.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Witness Printer took 5.05 ms. Allocated memory is still 58.7 MB. Free memory was 25.2 MB in the beginning and 24.8 MB in the end (delta: 351.0 kB). There was no memory consumed. Max. memory is 16.1 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 someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 67. Possible FailurePath: [L66] float x = 0.0f; [L67] float y = -0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L3] __assert_fail("0", "float_req_bl_1232a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 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 0.2.0-a4ecdab [2020-10-24 23:27:00,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:27:00,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:27:00,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:27:00,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:27:00,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:27:00,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:27:00,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:27:00,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:27:00,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:27:00,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:27:00,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:27:00,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:27:00,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:27:00,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:27:00,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:27:00,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:27:00,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:27:00,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:27:00,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:27:00,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:27:00,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:27:00,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:27:00,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:27:00,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:27:00,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:27:00,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:27:00,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:27:00,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:27:00,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:27:00,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:27:00,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:27:00,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:27:00,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:27:00,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:27:00,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:27:00,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:27:00,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:27:00,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:27:00,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:27:00,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:27:00,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 23:27:00,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:27:00,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:27:00,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:27:00,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:27:00,674 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:27:00,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:27:00,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:27:00,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:27:00,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:27:00,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:27:00,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:27:00,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:27:00,677 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 23:27:00,677 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 23:27:00,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:27:00,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:27:00,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:27:00,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:27:00,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:27:00,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:27:00,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:27:00,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:27:00,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:00,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:27:00,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:27:00,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:27:00,681 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 23:27:00,681 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 23:27:00,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:27:00,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:27:00,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 23:27:00,682 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c8ae05db5b455b7a642d0c86b0e222c46f03c [2020-10-24 23:27:01,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:27:01,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:27:01,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:27:01,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:27:01,152 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:27:01,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2020-10-24 23:27:01,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526c38f6f/bcaf685f3ccf413b8ff8e30128311d64/FLAG81341fc93 [2020-10-24 23:27:01,897 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:27:01,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2020-10-24 23:27:01,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526c38f6f/bcaf685f3ccf413b8ff8e30128311d64/FLAG81341fc93 [2020-10-24 23:27:02,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526c38f6f/bcaf685f3ccf413b8ff8e30128311d64 [2020-10-24 23:27:02,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:27:02,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:27:02,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:02,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:27:02,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:27:02,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab3c737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02, skipping insertion in model container [2020-10-24 23:27:02,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:27:02,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:27:02,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:02,628 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:27:02,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:02,678 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:27:02,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02 WrapperNode [2020-10-24 23:27:02,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:02,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:02,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:27:02,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:27:02,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:02,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:27:02,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:27:02,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:27:02,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (1/1) ... [2020-10-24 23:27:02,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:27:02,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:27:02,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:27:02,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:27:02,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (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 [2020-10-24 23:27:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 23:27:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:27:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-24 23:27:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:27:02,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:27:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-24 23:27:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:27:03,420 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:03,421 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-24 23:27:03,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:03 BoogieIcfgContainer [2020-10-24 23:27:03,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:03,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:03,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:03,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:03,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:27:02" (1/3) ... [2020-10-24 23:27:03,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdd427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:03, skipping insertion in model container [2020-10-24 23:27:03,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:02" (2/3) ... [2020-10-24 23:27:03,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdd427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:03, skipping insertion in model container [2020-10-24 23:27:03,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:03" (3/3) ... [2020-10-24 23:27:03,432 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2020-10-24 23:27:03,444 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:03,450 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:03,463 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:03,489 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:03,490 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:03,490 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:03,490 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:03,490 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:03,491 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:03,491 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:03,491 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-24 23:27:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:27:03,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:03,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:03,511 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-24 23:27:03,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:03,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687785470] [2020-10-24 23:27:03,530 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 [2020-10-24 23:27:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:03,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 23:27:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:03,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:03,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687785470] [2020-10-24 23:27:03,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:03,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 23:27:03,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955664859] [2020-10-24 23:27:03,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:03,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:03,675 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-24 23:27:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:03,695 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-24 23:27:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:03,697 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:27:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:03,707 INFO L225 Difference]: With dead ends: 63 [2020-10-24 23:27:03,707 INFO L226 Difference]: Without dead ends: 29 [2020-10-24 23:27:03,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-24 23:27:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-24 23:27:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-24 23:27:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-24 23:27:03,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-24 23:27:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:03,747 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-24 23:27:03,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-24 23:27:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:27:03,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:03,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:03,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 23:27:03,966 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-24 23:27:03,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:03,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694019725] [2020-10-24 23:27:03,969 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 [2020-10-24 23:27:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:04,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:04,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694019725] [2020-10-24 23:27:04,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:04,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:04,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806055568] [2020-10-24 23:27:04,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:04,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:04,161 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-24 23:27:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:04,289 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-24 23:27:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:04,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-24 23:27:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:04,291 INFO L225 Difference]: With dead ends: 68 [2020-10-24 23:27:04,291 INFO L226 Difference]: Without dead ends: 59 [2020-10-24 23:27:04,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-24 23:27:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-24 23:27:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:04,301 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-24 23:27:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:04,302 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:04,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:04,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:04,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:04,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:04,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 23:27:04,523 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:04,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:04,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-24 23:27:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:04,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869298365] [2020-10-24 23:27:04,526 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 [2020-10-24 23:27:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-24 23:27:04,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:04,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:04,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869298365] [2020-10-24 23:27:04,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:04,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-24 23:27:04,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330260646] [2020-10-24 23:27:04,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:04,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:04,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:04,716 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:04,787 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-24 23:27:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:04,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:27:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:04,790 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:27:04,790 INFO L226 Difference]: Without dead ends: 26 [2020-10-24 23:27:04,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-24 23:27:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-24 23:27:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-24 23:27:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-24 23:27:04,802 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-24 23:27:04,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:04,802 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-24 23:27:04,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-24 23:27:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-24 23:27:04,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:04,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:05,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 23:27:05,018 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:05,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:05,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-24 23:27:05,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:05,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640401502] [2020-10-24 23:27:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:05,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640401502] [2020-10-24 23:27:05,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:05,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:05,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365044242] [2020-10-24 23:27:05,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:05,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:05,140 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-24 23:27:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:05,209 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-24 23:27:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:05,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-24 23:27:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:05,211 INFO L225 Difference]: With dead ends: 61 [2020-10-24 23:27:05,211 INFO L226 Difference]: Without dead ends: 52 [2020-10-24 23:27:05,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-24 23:27:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-24 23:27:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:27:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-24 23:27:05,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-10-24 23:27:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:05,219 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-24 23:27:05,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-24 23:27:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:27:05,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:05,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:05,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-24 23:27:05,434 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:05,435 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-24 23:27:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:05,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560877844] [2020-10-24 23:27:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:05,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-24 23:27:05,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:05,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560877844] [2020-10-24 23:27:05,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:05,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-24 23:27:05,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158236092] [2020-10-24 23:27:05,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:05,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:05,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:05,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:05,578 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-24 23:27:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:05,590 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-24 23:27:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 23:27:05,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-24 23:27:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:05,592 INFO L225 Difference]: With dead ends: 38 [2020-10-24 23:27:05,592 INFO L226 Difference]: Without dead ends: 28 [2020-10-24 23:27:05,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-24 23:27:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-24 23:27:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:27:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-24 23:27:05,599 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-24 23:27:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:05,599 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-24 23:27:05,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-24 23:27:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:27:05,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:05,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:05,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-24 23:27:05,814 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-24 23:27:05,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:05,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310179369] [2020-10-24 23:27:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-24 23:27:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:06,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310179369] [2020-10-24 23:27:06,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:06,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-24 23:27:06,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705788549] [2020-10-24 23:27:06,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 23:27:06,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:06,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 23:27:06,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-24 23:27:06,003 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-24 23:27:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:06,124 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-24 23:27:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 23:27:06,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-24 23:27:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:06,126 INFO L225 Difference]: With dead ends: 40 [2020-10-24 23:27:06,126 INFO L226 Difference]: Without dead ends: 37 [2020-10-24 23:27:06,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:27:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-24 23:27:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-24 23:27:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-24 23:27:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-24 23:27:06,133 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-24 23:27:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:06,133 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-24 23:27:06,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 23:27:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-24 23:27:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-24 23:27:06,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:06,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:06,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-24 23:27:06,348 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-24 23:27:06,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:06,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533996010] [2020-10-24 23:27:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:06,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-24 23:27:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:06,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:06,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533996010] [2020-10-24 23:27:06,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:06,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-24 23:27:06,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942679070] [2020-10-24 23:27:06,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 23:27:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 23:27:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:06,505 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-24 23:27:06,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:06,569 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-24 23:27:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 23:27:06,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-24 23:27:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:06,571 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:27:06,571 INFO L226 Difference]: Without dead ends: 23 [2020-10-24 23:27:06,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-24 23:27:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-24 23:27:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-24 23:27:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-24 23:27:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-24 23:27:06,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-10-24 23:27:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:06,577 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-24 23:27:06,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 23:27:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-24 23:27:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-24 23:27:06,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:06,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:06,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-24 23:27:06,791 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-24 23:27:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:06,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436545376] [2020-10-24 23:27:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-24 23:27:06,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:06,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 23:27:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:06,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:07,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436545376] [2020-10-24 23:27:07,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:07,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-10-24 23:27:07,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51919] [2020-10-24 23:27:07,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 23:27:07,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:07,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 23:27:07,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-24 23:27:07,285 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 16 states. [2020-10-24 23:27:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:07,514 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-10-24 23:27:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 23:27:07,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-10-24 23:27:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:07,516 INFO L225 Difference]: With dead ends: 23 [2020-10-24 23:27:07,516 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 23:27:07,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-10-24 23:27:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 23:27:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 23:27:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 23:27:07,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 23:27:07,517 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-24 23:27:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:07,517 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 23:27:07,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 23:27:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 23:27:07,518 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 23:27:07,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-24 23:27:07,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 23:27:08,020 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-24 23:27:08,022 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-24 23:27:08,022 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-24 23:27:08,022 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-24 23:27:08,023 INFO L274 CegarLoopResult]: For program point L28(lines 28 34) no Hoare annotation was computed. [2020-10-24 23:27:08,023 INFO L274 CegarLoopResult]: For program point L28-1(lines 28 34) no Hoare annotation was computed. [2020-10-24 23:27:08,023 INFO L274 CegarLoopResult]: For program point L71(line 71) no Hoare annotation was computed. [2020-10-24 23:27:08,023 INFO L274 CegarLoopResult]: For program point L38(lines 38 39) no Hoare annotation was computed. [2020-10-24 23:27:08,023 INFO L274 CegarLoopResult]: For program point L71-2(lines 71 74) no Hoare annotation was computed. [2020-10-24 23:27:08,023 INFO L270 CegarLoopResult]: At program point L55(lines 46 56) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and |ULTIMATE.start_main_#t~short16| (= (bvadd |ULTIMATE.start___signbit_float_#res| (_ bv4294967295 32)) (_ bv0 32)) (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= |ULTIMATE.start_fmin_float_#res| .cse0) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= .cse0 ULTIMATE.start___signbit_float_~x) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= .cse0 ULTIMATE.start_main_~res~0) (= ULTIMATE.start_fmin_float_~y .cse0) (= .cse0 (fp ((_ extract 31 31) ULTIMATE.start___signbit_float_~w~1) ((_ extract 30 23) ULTIMATE.start___signbit_float_~w~1) ((_ extract 22 0) ULTIMATE.start___signbit_float_~w~1))))) [2020-10-24 23:27:08,024 INFO L274 CegarLoopResult]: For program point L31(lines 31 34) no Hoare annotation was computed. [2020-10-24 23:27:08,024 INFO L274 CegarLoopResult]: For program point L31-1(lines 31 34) no Hoare annotation was computed. [2020-10-24 23:27:08,024 INFO L274 CegarLoopResult]: For program point L40(lines 40 41) no Hoare annotation was computed. [2020-10-24 23:27:08,024 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-24 23:27:08,024 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 23:27:08,024 INFO L274 CegarLoopResult]: For program point L49-1(lines 49 53) no Hoare annotation was computed. [2020-10-24 23:27:08,024 INFO L270 CegarLoopResult]: At program point L49-2(lines 49 53) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and |ULTIMATE.start_main_#t~short16| (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= |ULTIMATE.start_fmin_float_#res| .cse0) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= .cse0 ULTIMATE.start___signbit_float_~x) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= .cse0 ULTIMATE.start_main_~res~0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2020-10-24 23:27:08,024 INFO L274 CegarLoopResult]: For program point L49-3(lines 49 53) no Hoare annotation was computed. [2020-10-24 23:27:08,024 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-24 23:27:08,025 INFO L274 CegarLoopResult]: For program point L25(lines 25 34) no Hoare annotation was computed. [2020-10-24 23:27:08,025 INFO L274 CegarLoopResult]: For program point L25-1(lines 25 34) no Hoare annotation was computed. [2020-10-24 23:27:08,025 INFO L274 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-10-24 23:27:08,025 INFO L270 CegarLoopResult]: At program point L17-2(lines 17 21) the Hoare annotation is: (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmin_float_~y (fp.neg (_ +zero 8 24))) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x)) [2020-10-24 23:27:08,025 INFO L274 CegarLoopResult]: For program point L17-3(lines 14 35) no Hoare annotation was computed. [2020-10-24 23:27:08,025 INFO L274 CegarLoopResult]: For program point L17-5(lines 17 21) no Hoare annotation was computed. [2020-10-24 23:27:08,025 INFO L270 CegarLoopResult]: At program point L17-6(lines 17 21) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2020-10-24 23:27:08,025 INFO L274 CegarLoopResult]: For program point L17-7(lines 14 35) no Hoare annotation was computed. [2020-10-24 23:27:08,026 INFO L270 CegarLoopResult]: At program point L34(lines 14 35) the Hoare annotation is: (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmin_float_~y (fp.neg (_ +zero 8 24))) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x)) [2020-10-24 23:27:08,026 INFO L270 CegarLoopResult]: At program point L34-1(lines 14 35) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2020-10-24 23:27:08,029 INFO L277 CegarLoopResult]: At program point L76(lines 58 77) the Hoare annotation is: true [2020-10-24 23:27:08,029 INFO L274 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-10-24 23:27:08,030 INFO L274 CegarLoopResult]: For program point L43-2(line 43) no Hoare annotation was computed. [2020-10-24 23:27:08,030 INFO L270 CegarLoopResult]: At program point L43-3(lines 37 44) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= |ULTIMATE.start_fmin_float_#res| .cse0) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2020-10-24 23:27:08,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:08 BoogieIcfgContainer [2020-10-24 23:27:08,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:08,071 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:08,071 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:08,071 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:08,072 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:03" (3/4) ... [2020-10-24 23:27:08,075 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-24 23:27:08,091 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-10-24 23:27:08,091 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-24 23:27:08,092 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-24 23:27:08,092 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-24 23:27:08,124 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && 2bv32 == \result) && ~Pluszero~LONGDOUBLE() == x [2020-10-24 23:27:08,125 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2020-10-24 23:27:08,126 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((aux-res == -0.0f && __signbit_float(res) == 1-aux && x == ~Pluszero~LONGDOUBLE()) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == res) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2020-10-24 23:27:08,127 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && !(0bv32 == \result)) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2020-10-24 23:27:08,128 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((aux-res == -0.0f && __signbit_float(res) == 1-aux && ~bvadd64(\result, 4294967295bv32) == 0bv32) && x == ~Pluszero~LONGDOUBLE()) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == res) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) [2020-10-24 23:27:08,167 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 23:27:08,168 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:08,172 INFO L168 Benchmark]: Toolchain (without parser) took 5879.03 ms. Allocated memory was 39.8 MB in the beginning and 65.0 MB in the end (delta: 25.2 MB). Free memory was 16.9 MB in the beginning and 33.1 MB in the end (delta: -16.2 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:08,174 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 39.8 MB. Free memory was 26.2 MB in the beginning and 26.2 MB in the end (delta: 26.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:08,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.77 ms. Allocated memory was 39.8 MB in the beginning and 50.3 MB in the end (delta: 10.5 MB). Free memory was 16.3 MB in the beginning and 25.2 MB in the end (delta: -8.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:08,177 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.46 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 23.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:08,180 INFO L168 Benchmark]: Boogie Preprocessor took 38.49 ms. Allocated memory is still 50.3 MB. Free memory was 23.4 MB in the beginning and 21.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:08,181 INFO L168 Benchmark]: RCFGBuilder took 655.58 ms. Allocated memory is still 50.3 MB. Free memory was 21.7 MB in the beginning and 29.2 MB in the end (delta: -7.5 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:08,182 INFO L168 Benchmark]: TraceAbstraction took 4645.37 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 29.0 MB in the beginning and 37.3 MB in the end (delta: -8.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:08,183 INFO L168 Benchmark]: Witness Printer took 98.35 ms. Allocated memory is still 65.0 MB. Free memory was 37.3 MB in the beginning and 33.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:08,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 39.8 MB. Free memory was 26.2 MB in the beginning and 26.2 MB in the end (delta: 26.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.77 ms. Allocated memory was 39.8 MB in the beginning and 50.3 MB in the end (delta: 10.5 MB). Free memory was 16.3 MB in the beginning and 25.2 MB in the end (delta: -8.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.46 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 23.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.49 ms. Allocated memory is still 50.3 MB. Free memory was 23.4 MB in the beginning and 21.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 655.58 ms. Allocated memory is still 50.3 MB. Free memory was 21.7 MB in the beginning and 29.2 MB in the end (delta: -7.5 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4645.37 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 29.0 MB in the beginning and 37.3 MB in the end (delta: -8.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. * Witness Printer took 98.35 ms. Allocated memory is still 65.0 MB. Free memory was 37.3 MB in the beginning and 33.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (x == ~Pluszero~LONGDOUBLE() && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~Pluszero~LONGDOUBLE() == x - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((aux-res == -0.0f && __signbit_float(res) == 1-aux && x == ~Pluszero~LONGDOUBLE()) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == res) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && !(0bv32 == \result)) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((((((aux-res == -0.0f && __signbit_float(res) == 1-aux && ~bvadd64(\result, 4294967295bv32) == 0bv32) && x == ~Pluszero~LONGDOUBLE()) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == res) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && 2bv32 == \result) && ~Pluszero~LONGDOUBLE() == x - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 204 SDslu, 399 SDs, 0 SdLazy, 150 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 16 NumberOfFragments, 184 HoareAnnotationTreeSize, 8 FomulaSimplifications, 48 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 16152 SizeOfPredicates, 38 NumberOfNonLiveVariables, 519 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...