./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/freire1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/freire1.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 b056c40c352516a88a49e796700e87b5fe62c1cb ................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/freire1.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 b056c40c352516a88a49e796700e87b5fe62c1cb ................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 04:47:52,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 04:47:52,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 04:47:52,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 04:47:52,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 04:47:52,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 04:47:52,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 04:47:52,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 04:47:52,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 04:47:52,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 04:47:52,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 04:47:52,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 04:47:52,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 04:47:52,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 04:47:52,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 04:47:52,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 04:47:52,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 04:47:52,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 04:47:52,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 04:47:52,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 04:47:52,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 04:47:52,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 04:47:52,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 04:47:52,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 04:47:52,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 04:47:52,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 04:47:52,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 04:47:52,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 04:47:52,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 04:47:52,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 04:47:52,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 04:47:52,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 04:47:52,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 04:47:52,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 04:47:52,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 04:47:52,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 04:47:52,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 04:47:52,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 04:47:52,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 04:47:52,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 04:47:52,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 04:47:52,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 04:47:52,251 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 04:47:52,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 04:47:52,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 04:47:52,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 04:47:52,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 04:47:52,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 04:47:52,253 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 04:47:52,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 04:47:52,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 04:47:52,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 04:47:52,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 04:47:52,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 04:47:52,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 04:47:52,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 04:47:52,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 04:47:52,254 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 04:47:52,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 04:47:52,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 04:47:52,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 04:47:52,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 04:47:52,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 04:47:52,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 04:47:52,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:47:52,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 04:47:52,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 04:47:52,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 04:47:52,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 04:47:52,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 04:47:52,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 04:47:52,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 04:47:52,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b056c40c352516a88a49e796700e87b5fe62c1cb [2021-08-26 04:47:52,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 04:47:52,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 04:47:52,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 04:47:52,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 04:47:52,532 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 04:47:52,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire1.c [2021-08-26 04:47:52,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8dccd389/0a392e546ccc455883cde85090983f01/FLAG86c62c639 [2021-08-26 04:47:52,907 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 04:47:52,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c [2021-08-26 04:47:52,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8dccd389/0a392e546ccc455883cde85090983f01/FLAG86c62c639 [2021-08-26 04:47:52,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8dccd389/0a392e546ccc455883cde85090983f01 [2021-08-26 04:47:52,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 04:47:52,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 04:47:52,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 04:47:52,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 04:47:52,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 04:47:52,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:47:52" (1/1) ... [2021-08-26 04:47:52,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63112da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:52, skipping insertion in model container [2021-08-26 04:47:52,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:47:52" (1/1) ... [2021-08-26 04:47:52,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 04:47:52,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 04:47:53,042 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2021-08-26 04:47:53,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:47:53,060 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 04:47:53,068 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2021-08-26 04:47:53,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:47:53,084 INFO L208 MainTranslator]: Completed translation [2021-08-26 04:47:53,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53 WrapperNode [2021-08-26 04:47:53,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 04:47:53,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 04:47:53,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 04:47:53,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 04:47:53,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 04:47:53,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 04:47:53,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 04:47:53,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 04:47:53,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 04:47:53,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 04:47:53,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 04:47:53,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 04:47:53,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (1/1) ... [2021-08-26 04:47:53,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:47:53,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:47:53,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 04:47:53,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 04:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 04:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 04:47:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 04:47:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 04:47:53,436 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 04:47:53,436 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 04:47:53,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:47:53 BoogieIcfgContainer [2021-08-26 04:47:53,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 04:47:53,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 04:47:53,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 04:47:53,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 04:47:53,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:47:52" (1/3) ... [2021-08-26 04:47:53,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d7b893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:47:53, skipping insertion in model container [2021-08-26 04:47:53,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:53" (2/3) ... [2021-08-26 04:47:53,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d7b893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:47:53, skipping insertion in model container [2021-08-26 04:47:53,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:47:53" (3/3) ... [2021-08-26 04:47:53,451 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2021-08-26 04:47:53,454 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 04:47:53,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 04:47:53,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 04:47:53,519 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 04:47:53,520 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 04:47:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:47:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-26 04:47:53,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:47:53,533 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-26 04:47:53,534 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:47:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:47:53,542 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2021-08-26 04:47:53,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:47:53,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163121352] [2021-08-26 04:47:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:47:53,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:47:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 04:47:53,625 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 04:47:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 04:47:53,671 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 04:47:53,673 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 04:47:53,674 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:47:53,675 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:47:53,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 04:47:53,679 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 04:47:53,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:47:53 BoogieIcfgContainer [2021-08-26 04:47:53,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 04:47:53,694 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 04:47:53,694 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 04:47:53,694 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 04:47:53,694 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:47:53" (3/4) ... [2021-08-26 04:47:53,696 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 04:47:53,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 04:47:53,698 INFO L168 Benchmark]: Toolchain (without parser) took 774.94 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 22.6 MB in the beginning and 39.6 MB in the end (delta: -17.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:47:53,699 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory was 29.0 MB in the beginning and 28.9 MB in the end (delta: 60.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:47:53,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.54 ms. Allocated memory is still 46.1 MB. Free memory was 22.4 MB in the beginning and 23.7 MB in the end (delta: -1.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2021-08-26 04:47:53,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.32 ms. Allocated memory is still 46.1 MB. Free memory was 23.7 MB in the beginning and 29.9 MB in the end (delta: -6.2 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-08-26 04:47:53,702 INFO L168 Benchmark]: Boogie Preprocessor took 26.85 ms. Allocated memory is still 46.1 MB. Free memory was 29.9 MB in the beginning and 28.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:47:53,704 INFO L168 Benchmark]: RCFGBuilder took 265.16 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 28.8 MB in the beginning and 39.3 MB in the end (delta: -10.6 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-08-26 04:47:53,708 INFO L168 Benchmark]: TraceAbstraction took 252.19 ms. Allocated memory is still 58.7 MB. Free memory was 38.9 MB in the beginning and 40.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-08-26 04:47:53,708 INFO L168 Benchmark]: Witness Printer took 2.93 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 39.6 MB in the end (delta: 246.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:47:53,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory was 29.0 MB in the beginning and 28.9 MB in the end (delta: 60.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 162.54 ms. Allocated memory is still 46.1 MB. Free memory was 22.4 MB in the beginning and 23.7 MB in the end (delta: -1.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.32 ms. Allocated memory is still 46.1 MB. Free memory was 23.7 MB in the beginning and 29.9 MB in the end (delta: -6.2 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.85 ms. Allocated memory is still 46.1 MB. Free memory was 29.9 MB in the beginning and 28.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 265.16 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 28.8 MB in the beginning and 39.3 MB in the end (delta: -10.6 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 252.19 ms. Allocated memory is still 58.7 MB. Free memory was 38.9 MB in the beginning and 40.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 2.93 ms. Allocated memory is still 58.7 MB. Free memory was 39.9 MB in the beginning and 39.6 MB in the end (delta: 246.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] x = a / 2.0 [L29] r = 0 [L31] COND TRUE 1 [L17] COND TRUE !(cond) [L19] reach_error() - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 171.9ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 7.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.9ms SsaConstructionTime, 30.7ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 04:47:53,748 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 04:47:55,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 04:47:55,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 04:47:55,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 04:47:55,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 04:47:55,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 04:47:55,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 04:47:55,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 04:47:55,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 04:47:55,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 04:47:55,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 04:47:55,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 04:47:55,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 04:47:55,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 04:47:55,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 04:47:55,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 04:47:55,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 04:47:55,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 04:47:55,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 04:47:55,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 04:47:55,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 04:47:55,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 04:47:55,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 04:47:55,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 04:47:55,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 04:47:55,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 04:47:55,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 04:47:55,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 04:47:55,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 04:47:55,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 04:47:55,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 04:47:55,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 04:47:55,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 04:47:55,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 04:47:55,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 04:47:55,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 04:47:55,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 04:47:55,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 04:47:55,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 04:47:55,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 04:47:55,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 04:47:55,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 04:47:55,553 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 04:47:55,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 04:47:55,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 04:47:55,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 04:47:55,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 04:47:55,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 04:47:55,556 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 04:47:55,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 04:47:55,557 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 04:47:55,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 04:47:55,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 04:47:55,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 04:47:55,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 04:47:55,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 04:47:55,558 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 04:47:55,558 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 04:47:55,558 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 04:47:55,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 04:47:55,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 04:47:55,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 04:47:55,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 04:47:55,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 04:47:55,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 04:47:55,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:47:55,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 04:47:55,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 04:47:55,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 04:47:55,560 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 04:47:55,560 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 04:47:55,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 04:47:55,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 04:47:55,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 04:47:55,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b056c40c352516a88a49e796700e87b5fe62c1cb [2021-08-26 04:47:55,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 04:47:55,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 04:47:55,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 04:47:55,854 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 04:47:55,854 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 04:47:55,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire1.c [2021-08-26 04:47:55,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a89367ee8/e5fb4e90258b4f548087f44ee2627c13/FLAG42a93ee61 [2021-08-26 04:47:56,253 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 04:47:56,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c [2021-08-26 04:47:56,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a89367ee8/e5fb4e90258b4f548087f44ee2627c13/FLAG42a93ee61 [2021-08-26 04:47:56,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a89367ee8/e5fb4e90258b4f548087f44ee2627c13 [2021-08-26 04:47:56,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 04:47:56,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 04:47:56,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 04:47:56,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 04:47:56,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 04:47:56,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26175893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56, skipping insertion in model container [2021-08-26 04:47:56,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 04:47:56,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 04:47:56,358 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2021-08-26 04:47:56,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:47:56,372 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 04:47:56,417 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2021-08-26 04:47:56,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:47:56,433 INFO L208 MainTranslator]: Completed translation [2021-08-26 04:47:56,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56 WrapperNode [2021-08-26 04:47:56,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 04:47:56,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 04:47:56,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 04:47:56,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 04:47:56,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 04:47:56,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 04:47:56,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 04:47:56,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 04:47:56,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 04:47:56,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 04:47:56,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 04:47:56,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 04:47:56,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (1/1) ... [2021-08-26 04:47:56,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:47:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:47:56,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 04:47:56,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 04:47:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 04:47:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 04:47:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 04:47:56,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 04:48:01,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 04:48:01,659 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 04:48:01,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:48:01 BoogieIcfgContainer [2021-08-26 04:48:01,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 04:48:01,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 04:48:01,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 04:48:01,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 04:48:01,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:47:56" (1/3) ... [2021-08-26 04:48:01,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5fb280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:48:01, skipping insertion in model container [2021-08-26 04:48:01,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:47:56" (2/3) ... [2021-08-26 04:48:01,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5fb280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:48:01, skipping insertion in model container [2021-08-26 04:48:01,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:48:01" (3/3) ... [2021-08-26 04:48:01,666 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2021-08-26 04:48:01,669 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 04:48:01,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 04:48:01,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 04:48:01,708 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 04:48:01,708 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 04:48:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:48:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-26 04:48:01,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:48:01,719 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-26 04:48:01,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:48:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:48:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2021-08-26 04:48:01,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 04:48:01,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978635711] [2021-08-26 04:48:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:48:01,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 04:48:01,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 04:48:01,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 04:48:01,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 04:48:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:48:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 04:48:03,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:48:17,205 WARN L838 $PredicateComparison]: unable to prove that (or (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 ULTIMATE.start_main_~a~0) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32))))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) is different from false [2021-08-26 04:48:23,620 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 ULTIMATE.start_main_~a~0) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from false [2021-08-26 04:48:25,654 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 ULTIMATE.start_main_~a~0) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from true [2021-08-26 04:48:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:48:25,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 04:48:31,957 WARN L838 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) is different from false [2021-08-26 04:48:34,017 WARN L860 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) is different from true [2021-08-26 04:48:40,180 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) is different from false [2021-08-26 04:48:42,230 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) is different from true [2021-08-26 04:48:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:48:42,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 04:48:42,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978635711] [2021-08-26 04:48:42,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978635711] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 04:48:42,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:48:42,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-08-26 04:48:42,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248507990] [2021-08-26 04:48:42,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 04:48:42,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 04:48:42,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 04:48:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=13, Unknown=7, NotChecked=36, Total=72 [2021-08-26 04:48:42,254 INFO L87 Difference]: Start difference. First operand has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:48:45,293 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-08-26 04:48:47,341 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-08-26 04:48:49,394 WARN L838 $PredicateComparison]: unable to prove that (and (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) (= c_ULTIMATE.start_main_~r~0 (_ bv0 32)) (= c_ULTIMATE.start_main_~x~0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-08-26 04:48:51,454 WARN L860 $PredicateComparison]: unable to prove that (and (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) (= c_ULTIMATE.start_main_~r~0 (_ bv0 32)) (= c_ULTIMATE.start_main_~x~0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-08-26 04:49:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:49:07,693 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-08-26 04:49:07,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 04:49:07,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-26 04:49:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:49:07,699 INFO L225 Difference]: With dead ends: 30 [2021-08-26 04:49:07,699 INFO L226 Difference]: Without dead ends: 13 [2021-08-26 04:49:07,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25929.0ms TimeCoverageRelationStatistics Valid=23, Invalid=20, Unknown=11, NotChecked=78, Total=132 [2021-08-26 04:49:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-26 04:49:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-26 04:49:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:49:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-08-26 04:49:07,720 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2021-08-26 04:49:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:49:07,721 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-08-26 04:49:07,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:49:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-08-26 04:49:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 04:49:07,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:49:07,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:49:07,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-26 04:49:07,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 04:49:07,938 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:49:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:49:07,938 INFO L82 PathProgramCache]: Analyzing trace with hash 300765331, now seen corresponding path program 1 times [2021-08-26 04:49:07,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 04:49:07,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47872863] [2021-08-26 04:49:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:49:07,939 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 04:49:07,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 04:49:07,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 04:49:07,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 04:49:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:49:08,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 04:49:08,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:49:27,071 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)))) (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (not .cse0)))) is different from false [2021-08-26 04:49:29,138 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)))) (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (not .cse0)))) is different from true [2021-08-26 04:49:35,352 WARN L838 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) is different from false [2021-08-26 04:49:37,421 WARN L860 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)) is different from true [2021-08-26 04:49:49,852 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))) (_ bv0 32))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) is different from false [2021-08-26 04:49:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:49:49,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 04:50:08,611 WARN L838 $PredicateComparison]: unable to prove that (or (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32))) is different from false [2021-08-26 04:50:10,686 WARN L860 $PredicateComparison]: unable to prove that (or (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32))) is different from true [2021-08-26 04:50:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:50:10,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 04:50:10,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47872863] [2021-08-26 04:50:10,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47872863] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 04:50:10,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:50:10,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-08-26 04:50:10,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603986606] [2021-08-26 04:50:10,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 04:50:10,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 04:50:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 04:50:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=4, Unknown=7, NotChecked=20, Total=42 [2021-08-26 04:50:10,712 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:50:14,995 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)))) (and (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and .cse1 (not .cse0))) (or .cse1 .cse0))) is different from false [2021-08-26 04:50:17,067 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (.cse0 (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))) (_ bv0 32)))) (and (or (and .cse0 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (and .cse1 (not .cse0))) (or .cse1 .cse0))) is different from true [2021-08-26 04:50:19,132 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))) (_ bv0 32))) (not (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) is different from false [2021-08-26 04:50:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:50:19,140 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-08-26 04:50:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 04:50:19,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 8 [2021-08-26 04:50:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:50:19,140 INFO L225 Difference]: With dead ends: 13 [2021-08-26 04:50:19,140 INFO L226 Difference]: Without dead ends: 9 [2021-08-26 04:50:19,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20801.9ms TimeCoverageRelationStatistics Valid=15, Invalid=5, Unknown=10, NotChecked=42, Total=72 [2021-08-26 04:50:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-26 04:50:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-26 04:50:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:50:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-08-26 04:50:19,143 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 8 [2021-08-26 04:50:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:50:19,143 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-08-26 04:50:19,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:50:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-08-26 04:50:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 04:50:19,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:50:19,143 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-08-26 04:50:19,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-08-26 04:50:19,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 04:50:19,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:50:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:50:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 300806046, now seen corresponding path program 1 times [2021-08-26 04:50:19,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 04:50:19,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237497283] [2021-08-26 04:50:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:50:19,353 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 04:50:19,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 04:50:19,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 04:50:19,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 04:50:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 04:50:30,798 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 04:50:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 04:50:49,293 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-26 04:50:49,293 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 04:50:49,294 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:50:49,295 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:50:49,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 04:50:49,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 04:50:49,500 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 04:50:49,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:50:49 BoogieIcfgContainer [2021-08-26 04:50:49,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 04:50:49,520 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 04:50:49,520 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 04:50:49,520 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 04:50:49,520 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:48:01" (3/4) ... [2021-08-26 04:50:49,521 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 04:50:49,565 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 04:50:49,565 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 04:50:49,566 INFO L168 Benchmark]: Toolchain (without parser) took 173297.70 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 38.4 MB in the beginning and 35.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-08-26 04:50:49,567 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 42.0 MB in the end (delta: 37.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:50:49,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.20 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 43.4 MB in the end (delta: -5.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 04:50:49,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.40 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 41.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:50:49,568 INFO L168 Benchmark]: Boogie Preprocessor took 31.54 ms. Allocated memory is still 60.8 MB. Free memory was 41.7 MB in the beginning and 40.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:50:49,569 INFO L168 Benchmark]: RCFGBuilder took 5161.74 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 40.4 MB in the beginning and 55.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-08-26 04:50:49,572 INFO L168 Benchmark]: TraceAbstraction took 167857.23 ms. Allocated memory is still 73.4 MB. Free memory was 55.4 MB in the beginning and 37.1 MB in the end (delta: 18.3 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2021-08-26 04:50:49,572 INFO L168 Benchmark]: Witness Printer took 45.59 ms. Allocated memory is still 73.4 MB. Free memory was 36.6 MB in the beginning and 35.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:50:49,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 42.0 MB in the end (delta: 37.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.20 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 43.4 MB in the end (delta: -5.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.40 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 41.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.54 ms. Allocated memory is still 60.8 MB. Free memory was 41.7 MB in the beginning and 40.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5161.74 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 40.4 MB in the beginning and 55.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 167857.23 ms. Allocated memory is still 73.4 MB. Free memory was 55.4 MB in the beginning and 37.1 MB in the end (delta: 18.3 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. * Witness Printer took 45.59 ms. Allocated memory is still 73.4 MB. Free memory was 36.6 MB in the beginning and 35.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] x = a / 2.0 [L29] r = 0 [L31] COND TRUE 1 [L17] COND FALSE !(!(cond)) [L34] COND FALSE !(!(x > r)) [L36] x = x - r [L37] r = r + 1 [L31] COND TRUE 1 [L17] COND TRUE !(cond) [L19] reach_error() - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 167797.8ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 5.7ms, AutomataDifference: 33895.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 6 SDslu, 28 SDs, 0 SdLazy, 10 SolverSat, 2 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 18902.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46731.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 23.3ms SsaConstructionTime, 13242.7ms SatisfiabilityAnalysisTime, 101316.8ms InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 4 QuantifiedInterpolants, 374 SizeOfPredicates, 13 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 04:50:49,766 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...