./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-benchs/interpolation2.c.p+cfa-reducer.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 5c5b05c4ae88eb6dc9b39e487669b31df0ffdcd18c2998e1a9c5cebc84002587 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:24:34,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:24:34,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:24:34,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:24:34,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:24:34,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:24:34,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:24:34,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:24:34,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:24:34,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:24:34,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:24:34,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:24:34,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:24:34,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:24:34,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:24:34,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:24:34,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:24:34,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:24:34,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:24:34,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:24:34,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:24:34,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:24:34,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:24:34,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:24:34,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:24:34,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:24:34,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:24:34,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:24:34,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:24:34,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:24:34,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:24:34,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:24:34,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:24:34,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:24:34,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:24:34,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:24:34,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:24:34,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:24:34,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:24:34,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:24:34,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:24:34,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:24:34,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:24:34,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:24:34,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:24:34,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:24:34,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:24:34,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:24:34,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:24:34,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:24:34,177 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:24:34,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:24:34,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:24:34,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:24:34,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:24:34,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:24:34,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:24:34,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:24:34,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:24:34,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:24:34,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:24:34,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:24:34,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:24:34,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:24:34,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:24:34,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:24:34,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:24:34,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:24:34,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:24:34,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:24:34,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:24:34,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:24:34,192 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:24:34,192 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:24:34,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:24:34,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c5b05c4ae88eb6dc9b39e487669b31df0ffdcd18c2998e1a9c5cebc84002587 [2021-12-27 23:24:34,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:24:34,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:24:34,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:24:34,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:24:34,447 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:24:34,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c [2021-12-27 23:24:34,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e30774cf/6f51f0c8113a4b63abf650fffc5919b1/FLAG5e25a31ce [2021-12-27 23:24:34,836 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:24:34,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c [2021-12-27 23:24:34,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e30774cf/6f51f0c8113a4b63abf650fffc5919b1/FLAG5e25a31ce [2021-12-27 23:24:34,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e30774cf/6f51f0c8113a4b63abf650fffc5919b1 [2021-12-27 23:24:34,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:24:34,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:24:34,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:24:34,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:24:34,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:24:34,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:24:34" (1/1) ... [2021-12-27 23:24:34,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39482f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:34, skipping insertion in model container [2021-12-27 23:24:34,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:24:34" (1/1) ... [2021-12-27 23:24:34,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:24:34,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:24:34,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c[1455,1468] [2021-12-27 23:24:35,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:24:35,022 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:24:35,055 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c[1455,1468] [2021-12-27 23:24:35,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:24:35,076 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:24:35,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35 WrapperNode [2021-12-27 23:24:35,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:24:35,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:24:35,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:24:35,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:24:35,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,117 INFO L137 Inliner]: procedures = 18, calls = 55, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 131 [2021-12-27 23:24:35,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:24:35,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:24:35,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:24:35,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:24:35,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:24:35,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:24:35,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:24:35,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:24:35,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (1/1) ... [2021-12-27 23:24:35,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:24:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:24:35,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 23:24:35,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 23:24:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:24:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:24:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 23:24:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-12-27 23:24:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:24:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:24:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-12-27 23:24:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 23:24:35,287 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:24:35,288 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:24:35,455 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:24:35,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:24:35,459 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-27 23:24:35,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:24:35 BoogieIcfgContainer [2021-12-27 23:24:35,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:24:35,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:24:35,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:24:35,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:24:35,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:24:34" (1/3) ... [2021-12-27 23:24:35,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200daeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:24:35, skipping insertion in model container [2021-12-27 23:24:35,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:35" (2/3) ... [2021-12-27 23:24:35,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200daeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:24:35, skipping insertion in model container [2021-12-27 23:24:35,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:24:35" (3/3) ... [2021-12-27 23:24:35,466 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation2.c.p+cfa-reducer.c [2021-12-27 23:24:35,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:24:35,473 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:24:35,509 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:24:35,513 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:24:35,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:24:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-27 23:24:35,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:35,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:35,538 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash 83921358, now seen corresponding path program 1 times [2021-12-27 23:24:35,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:24:35,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243983347] [2021-12-27 23:24:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:35,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:24:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:24:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:24:35,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:24:35,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243983347] [2021-12-27 23:24:35,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243983347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:24:35,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:24:35,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 23:24:35,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198192913] [2021-12-27 23:24:35,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:24:35,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 23:24:35,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:24:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 23:24:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:24:35,773 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:24:35,842 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-12-27 23:24:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 23:24:35,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-27 23:24:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:24:35,851 INFO L225 Difference]: With dead ends: 51 [2021-12-27 23:24:35,851 INFO L226 Difference]: Without dead ends: 27 [2021-12-27 23:24:35,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-27 23:24:35,858 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:24:35,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:24:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-27 23:24:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2021-12-27 23:24:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-12-27 23:24:35,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 12 [2021-12-27 23:24:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:24:35,891 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-12-27 23:24:35,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-12-27 23:24:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-27 23:24:35,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:35,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:35,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:24:35,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash 100932019, now seen corresponding path program 1 times [2021-12-27 23:24:35,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:24:35,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528024015] [2021-12-27 23:24:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:35,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:24:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:24:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:24:35,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:24:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528024015] [2021-12-27 23:24:35,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528024015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:24:35,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:24:35,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:24:35,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244103788] [2021-12-27 23:24:35,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:24:35,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:24:35,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:24:35,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:24:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:24:35,940 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:24:35,949 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-27 23:24:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:24:35,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-27 23:24:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:24:35,950 INFO L225 Difference]: With dead ends: 34 [2021-12-27 23:24:35,950 INFO L226 Difference]: Without dead ends: 26 [2021-12-27 23:24:35,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:24:35,952 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:24:35,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 33 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:24:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-27 23:24:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2021-12-27 23:24:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-12-27 23:24:35,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2021-12-27 23:24:35,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:24:35,956 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-12-27 23:24:35,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-12-27 23:24:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-27 23:24:35,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:35,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:35,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 23:24:35,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash 10142420, now seen corresponding path program 1 times [2021-12-27 23:24:35,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:24:35,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709241501] [2021-12-27 23:24:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:35,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:24:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:24:35,974 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-27 23:24:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:24:35,998 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-27 23:24:35,998 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-27 23:24:35,999 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 23:24:36,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 23:24:36,003 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-27 23:24:36,004 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 23:24:36,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 11:24:36 BoogieIcfgContainer [2021-12-27 23:24:36,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 23:24:36,026 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 23:24:36,026 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 23:24:36,026 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 23:24:36,026 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:24:35" (3/4) ... [2021-12-27 23:24:36,028 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-27 23:24:36,028 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 23:24:36,029 INFO L158 Benchmark]: Toolchain (without parser) took 1173.50ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 31.5MB in the beginning and 40.5MB in the end (delta: -9.0MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2021-12-27 23:24:36,029 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory is still 36.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:24:36,030 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.20ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 31.4MB in the beginning and 55.2MB in the end (delta: -23.8MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2021-12-27 23:24:36,030 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.12ms. Allocated memory is still 73.4MB. Free memory was 55.2MB in the beginning and 53.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:24:36,030 INFO L158 Benchmark]: Boogie Preprocessor took 38.87ms. Allocated memory is still 73.4MB. Free memory was 53.3MB in the beginning and 51.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:24:36,031 INFO L158 Benchmark]: RCFGBuilder took 303.05ms. Allocated memory is still 73.4MB. Free memory was 51.9MB in the beginning and 40.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-27 23:24:36,031 INFO L158 Benchmark]: TraceAbstraction took 563.26ms. Allocated memory is still 73.4MB. Free memory was 40.0MB in the beginning and 40.9MB in the end (delta: -844.9kB). Peak memory consumption was 537.4kB. Max. memory is 16.1GB. [2021-12-27 23:24:36,031 INFO L158 Benchmark]: Witness Printer took 2.81ms. Allocated memory is still 73.4MB. Free memory was 40.9MB in the beginning and 40.5MB in the end (delta: 376.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:24:36,033 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory is still 36.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.20ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 31.4MB in the beginning and 55.2MB in the end (delta: -23.8MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.12ms. Allocated memory is still 73.4MB. Free memory was 55.2MB in the beginning and 53.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.87ms. Allocated memory is still 73.4MB. Free memory was 53.3MB in the beginning and 51.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 303.05ms. Allocated memory is still 73.4MB. Free memory was 51.9MB in the beginning and 40.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 563.26ms. Allocated memory is still 73.4MB. Free memory was 40.0MB in the beginning and 40.9MB in the end (delta: -844.9kB). Peak memory consumption was 537.4kB. Max. memory is 16.1GB. * Witness Printer took 2.81ms. Allocated memory is still 73.4MB. Free memory was 40.9MB in the beginning and 40.5MB in the end (delta: 376.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 53]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 35, overapproximation of someBinaryDOUBLEComparisonOperation at line 40, overapproximation of to_real at line 17, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L14] int main__i; [L15] float main__z; [L16] float main__t; [L17] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] float main__org[5] = { 1, 5, -10, 30, 20 }; [L20] float main__slope[5] = { 4, -15, 40, -10, 0 }; [L21] main__t = __VERIFIER_nondet_float() [L22] int main____CPAchecker_TMP_0; [L23] EXPR main__min[0] VAL [__return_main=0, main__max={6:0}, main__min={7:0}, main__min[0]=49, main__org={4:0}, main__slope={5:0}] [L23] COND TRUE main__t >= (main__min[0]) [L25] EXPR main__max[4UL] VAL [__return_main=0, main__max={6:0}, main__max[4UL]=51, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L25] COND TRUE main__t <= (main__max[4UL]) [L27] main____CPAchecker_TMP_0 = 1 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L29] COND TRUE main____CPAchecker_TMP_0 != 0 [L31] main__i = 0 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L33] COND TRUE main__i < 5UL [L35] EXPR main__max[main__i] VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={6:0}, main__max[main__i]=50, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L35] COND TRUE main__t <= (main__max[main__i]) [L38] EXPR main__org[main__i] [L38] EXPR main__slope[main__i] [L38] EXPR main__min[main__i] [L38] EXPR main__max[main__i] [L38] EXPR main__min[main__i] [L38] main__z = (main__org[main__i]) + (((main__slope[main__i]) * (main__t - (main__min[main__i]))) / ((main__max[main__i]) - (main__min[main__i]))) [L39] int main____CPAchecker_TMP_1; VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L40] COND FALSE !(main__z >= -10.0) VAL [__return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L65] main____CPAchecker_TMP_1 = 0 VAL [__return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L47] int __tmp_1; [L48] __tmp_1 = main____CPAchecker_TMP_1 [L49] int __VERIFIER_assert__cond; [L50] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L51] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] [L53] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={6:0}, main__min={7:0}, main__org={4:0}, main__slope={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 118 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 76 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24 IncrementalHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 42 mSDtfsCounter, 24 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 20 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 32 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-27 23:24:36,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-benchs/interpolation2.c.p+cfa-reducer.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 5c5b05c4ae88eb6dc9b39e487669b31df0ffdcd18c2998e1a9c5cebc84002587 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:24:37,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:24:37,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:24:37,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:24:37,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:24:37,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:24:37,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:24:37,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:24:37,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:24:37,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:24:37,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:24:37,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:24:37,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:24:37,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:24:37,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:24:37,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:24:37,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:24:37,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:24:37,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:24:37,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:24:37,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:24:37,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:24:37,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:24:37,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:24:37,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:24:37,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:24:37,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:24:37,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:24:37,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:24:37,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:24:37,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:24:37,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:24:37,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:24:37,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:24:37,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:24:37,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:24:37,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:24:37,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:24:37,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:24:37,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:24:37,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:24:37,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-27 23:24:37,631 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:24:37,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:24:37,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:24:37,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:24:37,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:24:37,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:24:37,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:24:37,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:24:37,633 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:24:37,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:24:37,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:24:37,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:24:37,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:24:37,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:24:37,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:24:37,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:24:37,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-27 23:24:37,635 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-27 23:24:37,635 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-27 23:24:37,635 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:24:37,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:24:37,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:24:37,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:24:37,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:24:37,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:24:37,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:24:37,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:24:37,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:24:37,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:24:37,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:24:37,643 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-27 23:24:37,643 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-27 23:24:37,643 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:24:37,643 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:24:37,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:24:37,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-27 23:24:37,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c5b05c4ae88eb6dc9b39e487669b31df0ffdcd18c2998e1a9c5cebc84002587 [2021-12-27 23:24:37,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:24:37,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:24:37,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:24:37,844 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:24:37,845 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:24:37,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c [2021-12-27 23:24:37,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e964935ae/1c50fe261372439892c96491e990c91a/FLAG6caad517a [2021-12-27 23:24:38,257 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:24:38,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c [2021-12-27 23:24:38,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e964935ae/1c50fe261372439892c96491e990c91a/FLAG6caad517a [2021-12-27 23:24:38,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e964935ae/1c50fe261372439892c96491e990c91a [2021-12-27 23:24:38,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:24:38,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:24:38,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:24:38,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:24:38,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:24:38,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e94326e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38, skipping insertion in model container [2021-12-27 23:24:38,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:24:38,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:24:38,387 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c[1455,1468] [2021-12-27 23:24:38,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:24:38,398 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:24:38,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.p+cfa-reducer.c[1455,1468] [2021-12-27 23:24:38,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:24:38,452 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:24:38,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38 WrapperNode [2021-12-27 23:24:38,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:24:38,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:24:38,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:24:38,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:24:38,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,476 INFO L137 Inliner]: procedures = 19, calls = 55, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 132 [2021-12-27 23:24:38,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:24:38,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:24:38,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:24:38,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:24:38,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:24:38,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:24:38,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:24:38,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:24:38,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (1/1) ... [2021-12-27 23:24:38,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:24:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:24:38,527 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 23:24:38,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 23:24:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:24:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2021-12-27 23:24:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-27 23:24:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 23:24:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2021-12-27 23:24:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:24:38,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:24:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 23:24:38,638 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:24:38,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:24:41,309 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:24:41,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:24:41,313 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-27 23:24:41,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:24:41 BoogieIcfgContainer [2021-12-27 23:24:41,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:24:41,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:24:41,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:24:41,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:24:41,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:24:38" (1/3) ... [2021-12-27 23:24:41,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78735b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:24:41, skipping insertion in model container [2021-12-27 23:24:41,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:24:38" (2/3) ... [2021-12-27 23:24:41,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78735b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:24:41, skipping insertion in model container [2021-12-27 23:24:41,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:24:41" (3/3) ... [2021-12-27 23:24:41,319 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation2.c.p+cfa-reducer.c [2021-12-27 23:24:41,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:24:41,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:24:41,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:24:41,353 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:24:41,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:24:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-27 23:24:41,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:41,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:41,365 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash 83921358, now seen corresponding path program 1 times [2021-12-27 23:24:41,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:24:41,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316710843] [2021-12-27 23:24:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:41,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:24:41,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:24:41,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 23:24:41,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-27 23:24:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:24:41,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 23:24:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:24:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:24:41,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:24:41,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 23:24:41,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316710843] [2021-12-27 23:24:41,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316710843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:24:41,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:24:41,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:24:41,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476388276] [2021-12-27 23:24:41,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:24:41,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:24:41,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 23:24:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:24:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:24:41,803 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:44,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 23:24:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:24:44,110 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-12-27 23:24:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:24:44,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-27 23:24:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:24:44,118 INFO L225 Difference]: With dead ends: 33 [2021-12-27 23:24:44,118 INFO L226 Difference]: Without dead ends: 19 [2021-12-27 23:24:44,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:24:44,125 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-27 23:24:44,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 41 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-27 23:24:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-27 23:24:44,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-12-27 23:24:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-12-27 23:24:44,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2021-12-27 23:24:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:24:44,146 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-12-27 23:24:44,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:44,146 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-12-27 23:24:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-27 23:24:44,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:44,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:44,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-27 23:24:44,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 23:24:44,360 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash -6868241, now seen corresponding path program 1 times [2021-12-27 23:24:44,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:24:44,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021987370] [2021-12-27 23:24:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:44,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:24:44,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:24:44,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 23:24:44,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-27 23:24:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:24:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 23:24:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:24:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:24:44,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:24:44,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 23:24:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021987370] [2021-12-27 23:24:44,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021987370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:24:44,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:24:44,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 23:24:44,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930158193] [2021-12-27 23:24:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:24:44,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:24:44,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 23:24:44,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:24:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:24:44,748 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:46,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 23:24:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:24:47,082 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-12-27 23:24:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:24:47,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-27 23:24:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:24:47,083 INFO L225 Difference]: With dead ends: 21 [2021-12-27 23:24:47,083 INFO L226 Difference]: Without dead ends: 17 [2021-12-27 23:24:47,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:24:47,084 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-27 23:24:47,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-27 23:24:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-27 23:24:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-27 23:24:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-12-27 23:24:47,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 13 [2021-12-27 23:24:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:24:47,088 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-12-27 23:24:47,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:24:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-12-27 23:24:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-27 23:24:47,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:24:47,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:24:47,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-27 23:24:47,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 23:24:47,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:24:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:24:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash 10142420, now seen corresponding path program 1 times [2021-12-27 23:24:47,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:24:47,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979358037] [2021-12-27 23:24:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:24:47,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:24:47,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:24:47,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 23:24:47,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-27 23:24:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:24:47,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-27 23:24:47,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:24:53,456 INFO L353 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-12-27 23:24:53,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 266 treesize of output 146 [2021-12-27 23:25:52,273 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_3 (_ BitVec 32))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv300 32)) (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_5 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32)) (v_arrayElimCell_2 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_5) ((_ extract 30 23) v_arrayElimCell_5) ((_ extract 22 0) v_arrayElimCell_5))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_2) ((_ extract 30 23) v_arrayElimCell_2) ((_ extract 22 0) v_arrayElimCell_2))) (.cse3 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (and (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv1 32)) .cse0) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32)) .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse1) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32)) .cse2) (= |c_ULTIMATE.start_main_~main__z~0#1| (fp.add c_currentRoundingMode .cse0 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode .cse3 (fp.sub c_currentRoundingMode |ULTIMATE.start_main_~main__t~0#1| .cse1)) (fp.sub c_currentRoundingMode .cse2 .cse1)))) (= .cse3 ((_ to_fp 8 24) c_currentRoundingMode (_ bv4 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse2)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false