./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1012a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 096883e9 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1012a.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 1df0ba28598e6a59f0398ecb9ba7a5975e0ea337 ..................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1012a.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 1df0ba28598e6a59f0398ecb9ba7a5975e0ea337 ................................................................................................................................................................................................................................................................................................................. 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 0.2.0-096883e [2020-12-01 23:19:53,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 23:19:53,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 23:19:53,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 23:19:53,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 23:19:53,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 23:19:53,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 23:19:53,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 23:19:53,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 23:19:53,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 23:19:53,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 23:19:53,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 23:19:53,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 23:19:53,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 23:19:53,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 23:19:53,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 23:19:53,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 23:19:53,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 23:19:53,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 23:19:53,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 23:19:53,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 23:19:53,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 23:19:53,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 23:19:53,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 23:19:53,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 23:19:53,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 23:19:53,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 23:19:53,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 23:19:53,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 23:19:53,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 23:19:53,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 23:19:53,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 23:19:53,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 23:19:53,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 23:19:53,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 23:19:53,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 23:19:53,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 23:19:53,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 23:19:53,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 23:19:53,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 23:19:53,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 23:19:53,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 23:19:53,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 23:19:53,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 23:19:53,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 23:19:53,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 23:19:53,453 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 23:19:53,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 23:19:53,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 23:19:53,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 23:19:53,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 23:19:53,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 23:19:53,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 23:19:53,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 23:19:53,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 23:19:53,455 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 23:19:53,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 23:19:53,455 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 23:19:53,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 23:19:53,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 23:19:53,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 23:19:53,456 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 23:19:53,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 23:19:53,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:19:53,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 23:19:53,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 23:19:53,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 23:19:53,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 23:19:53,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 23:19:53,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 23:19:53,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 23:19:53,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1df0ba28598e6a59f0398ecb9ba7a5975e0ea337 [2020-12-01 23:19:53,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 23:19:53,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 23:19:53,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 23:19:53,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 23:19:53,993 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 23:19:53,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1012a.c [2020-12-01 23:19:54,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306a219d1/909d8f029d0b4122a62c856798f6e550/FLAG75e41be40 [2020-12-01 23:19:54,866 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 23:19:54,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1012a.c [2020-12-01 23:19:54,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306a219d1/909d8f029d0b4122a62c856798f6e550/FLAG75e41be40 [2020-12-01 23:19:55,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306a219d1/909d8f029d0b4122a62c856798f6e550 [2020-12-01 23:19:55,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 23:19:55,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 23:19:55,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 23:19:55,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 23:19:55,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 23:19:55,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de65781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55, skipping insertion in model container [2020-12-01 23:19:55,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 23:19:55,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 23:19:55,416 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1012a.c[1638,1651] [2020-12-01 23:19:55,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:19:55,430 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 23:19:55,459 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1012a.c[1638,1651] [2020-12-01 23:19:55,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:19:55,485 INFO L208 MainTranslator]: Completed translation [2020-12-01 23:19:55,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55 WrapperNode [2020-12-01 23:19:55,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 23:19:55,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 23:19:55,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 23:19:55,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 23:19:55,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 23:19:55,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 23:19:55,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 23:19:55,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 23:19:55,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... [2020-12-01 23:19:55,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 23:19:55,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 23:19:55,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 23:19:55,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 23:19:55,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:19:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 23:19:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 23:19:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-01 23:19:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 23:19:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-01 23:19:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 23:19:55,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 23:19:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 23:19:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 23:19:56,042 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 23:19:56,043 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-01 23:19:56,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:19:56 BoogieIcfgContainer [2020-12-01 23:19:56,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 23:19:56,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 23:19:56,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 23:19:56,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 23:19:56,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 11:19:55" (1/3) ... [2020-12-01 23:19:56,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d266bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:19:56, skipping insertion in model container [2020-12-01 23:19:56,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:19:55" (2/3) ... [2020-12-01 23:19:56,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d266bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:19:56, skipping insertion in model container [2020-12-01 23:19:56,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:19:56" (3/3) ... [2020-12-01 23:19:56,066 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1012a.c [2020-12-01 23:19:56,109 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 23:19:56,116 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 23:19:56,153 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 23:19:56,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 23:19:56,210 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 23:19:56,211 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 23:19:56,211 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 23:19:56,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 23:19:56,212 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 23:19:56,212 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 23:19:56,212 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 23:19:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-01 23:19:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 23:19:56,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:19:56,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:19:56,242 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:19:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:19:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash -969083750, now seen corresponding path program 1 times [2020-12-01 23:19:56,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:19:56,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010472027] [2020-12-01 23:19:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:19:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:19:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 23:19:56,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010472027] [2020-12-01 23:19:56,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:19:56,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 23:19:56,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118974915] [2020-12-01 23:19:56,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 23:19:56,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 23:19:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 23:19:56,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:19:56,583 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-01 23:19:56,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:19:56,616 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-01 23:19:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 23:19:56,618 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-01 23:19:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:19:56,662 INFO L225 Difference]: With dead ends: 34 [2020-12-01 23:19:56,663 INFO L226 Difference]: Without dead ends: 15 [2020-12-01 23:19:56,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:19:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-01 23:19:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-01 23:19:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-01 23:19:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-12-01 23:19:56,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 11 [2020-12-01 23:19:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:19:56,714 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-12-01 23:19:56,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 23:19:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-12-01 23:19:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 23:19:56,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:19:56,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:19:56,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 23:19:56,717 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:19:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:19:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash 657368916, now seen corresponding path program 1 times [2020-12-01 23:19:56,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:19:56,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624523515] [2020-12-01 23:19:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:19:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:19:56,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:19:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:19:57,040 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:19:57,096 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 23:19:57,097 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 23:19:57,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 23:19:57,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 11:19:57 BoogieIcfgContainer [2020-12-01 23:19:57,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 23:19:57,148 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 23:19:57,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 23:19:57,149 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 23:19:57,150 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:19:56" (3/4) ... [2020-12-01 23:19:57,153 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 23:19:57,153 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 23:19:57,159 INFO L168 Benchmark]: Toolchain (without parser) took 1966.95 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 25.4 MB in the beginning and 30.9 MB in the end (delta: -5.5 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. [2020-12-01 23:19:57,160 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 39.8 MB. Free memory is still 22.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:19:57,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.40 ms. Allocated memory is still 39.8 MB. Free memory was 25.2 MB in the beginning and 24.5 MB in the end (delta: 720.0 kB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-12-01 23:19:57,163 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.45 ms. Allocated memory is still 39.8 MB. Free memory was 24.5 MB in the beginning and 22.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:19:57,164 INFO L168 Benchmark]: Boogie Preprocessor took 49.73 ms. Allocated memory is still 39.8 MB. Free memory was 22.8 MB in the beginning and 21.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:19:57,166 INFO L168 Benchmark]: RCFGBuilder took 462.07 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 21.2 MB in the beginning and 22.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-12-01 23:19:57,167 INFO L168 Benchmark]: TraceAbstraction took 1098.63 ms. Allocated memory is still 48.2 MB. Free memory was 21.9 MB in the beginning and 31.3 MB in the end (delta: -9.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:19:57,169 INFO L168 Benchmark]: Witness Printer took 5.45 ms. Allocated memory is still 48.2 MB. Free memory was 31.1 MB in the beginning and 30.9 MB in the end (delta: 247.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:19:57,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 39.8 MB. Free memory is still 22.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.40 ms. Allocated memory is still 39.8 MB. Free memory was 25.2 MB in the beginning and 24.5 MB in the end (delta: 720.0 kB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.45 ms. Allocated memory is still 39.8 MB. Free memory was 24.5 MB in the beginning and 22.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.73 ms. Allocated memory is still 39.8 MB. Free memory was 22.8 MB in the beginning and 21.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 462.07 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 21.2 MB in the beginning and 22.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1098.63 ms. Allocated memory is still 48.2 MB. Free memory was 21.9 MB in the beginning and 31.3 MB in the end (delta: -9.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.45 ms. Allocated memory is still 48.2 MB. Free memory was 31.1 MB in the beginning and 30.9 MB in the end (delta: 247.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 75]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 41, overapproximation of someBinaryArithmeticDOUBLEoperation at line 70, overapproximation of bitwiseAnd at line 40. Possible FailurePath: [L70] double x = 1.0 / 0.0; [L47] __uint32_t high; [L49] ieee_double_shape_type gh_u; [L50] gh_u.value = (x) [L51] EXPR gh_u.parts.msw [L51] (high) = gh_u.parts.msw [L54] ieee_double_shape_type sh_u; [L55] sh_u.value = (x) [L56] sh_u.parts.msw = (high & 0x7fffffff) [L57] EXPR sh_u.value [L57] (x) = sh_u.value [L59] return x; [L71] double res = fabs_double(x); [L33] __int32_t hx, lx; [L35] ieee_double_shape_type ew_u; [L36] ew_u.value = (x) [L37] EXPR ew_u.parts.msw [L37] (hx) = ew_u.parts.msw [L38] EXPR ew_u.parts.lsw [L38] (lx) = ew_u.parts.lsw [L40] hx &= 0x7fffffff [L41] hx |= (__uint32_t)(lx | (-lx)) >> 31 [L42] hx = 0x7ff00000 - hx [L43] return 1 - (int)((__uint32_t)(hx | (-hx)) >> 31); [L74] COND TRUE !isinf_double(res) [L75] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-096883e [2020-12-01 23:19:59,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 23:19:59,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 23:19:59,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 23:19:59,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 23:19:59,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 23:19:59,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 23:19:59,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 23:19:59,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 23:19:59,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 23:19:59,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 23:19:59,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 23:19:59,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 23:19:59,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 23:19:59,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 23:19:59,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 23:19:59,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 23:19:59,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 23:19:59,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 23:19:59,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 23:19:59,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 23:19:59,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 23:19:59,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 23:19:59,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 23:19:59,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 23:19:59,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 23:19:59,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 23:19:59,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 23:19:59,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 23:19:59,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 23:19:59,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 23:19:59,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 23:19:59,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 23:19:59,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 23:19:59,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 23:19:59,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 23:19:59,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 23:19:59,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 23:19:59,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 23:19:59,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 23:19:59,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 23:19:59,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-01 23:19:59,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 23:19:59,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 23:19:59,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 23:19:59,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 23:19:59,898 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 23:19:59,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 23:19:59,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 23:19:59,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 23:19:59,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 23:19:59,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 23:19:59,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 23:19:59,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 23:19:59,901 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-01 23:19:59,901 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-01 23:19:59,901 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 23:19:59,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 23:19:59,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 23:19:59,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 23:19:59,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 23:19:59,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 23:19:59,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 23:19:59,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 23:19:59,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:19:59,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 23:19:59,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 23:19:59,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 23:19:59,904 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-01 23:19:59,904 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-01 23:19:59,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 23:19:59,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 23:19:59,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-01 23:19:59,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1df0ba28598e6a59f0398ecb9ba7a5975e0ea337 [2020-12-01 23:20:00,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 23:20:00,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 23:20:00,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 23:20:00,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 23:20:00,343 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 23:20:00,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1012a.c [2020-12-01 23:20:00,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5d87a510/719d5cfa4d8047e7bafb4f68f5b5f91b/FLAG251da7455 [2020-12-01 23:20:00,980 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 23:20:00,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1012a.c [2020-12-01 23:20:00,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5d87a510/719d5cfa4d8047e7bafb4f68f5b5f91b/FLAG251da7455 [2020-12-01 23:20:01,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5d87a510/719d5cfa4d8047e7bafb4f68f5b5f91b [2020-12-01 23:20:01,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 23:20:01,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 23:20:01,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 23:20:01,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 23:20:01,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 23:20:01,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28854b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01, skipping insertion in model container [2020-12-01 23:20:01,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 23:20:01,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 23:20:01,608 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1012a.c[1638,1651] [2020-12-01 23:20:01,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:20:01,637 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 23:20:01,694 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1012a.c[1638,1651] [2020-12-01 23:20:01,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:20:01,720 INFO L208 MainTranslator]: Completed translation [2020-12-01 23:20:01,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01 WrapperNode [2020-12-01 23:20:01,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 23:20:01,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 23:20:01,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 23:20:01,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 23:20:01,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 23:20:01,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 23:20:01,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 23:20:01,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 23:20:01,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... [2020-12-01 23:20:01,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 23:20:01,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 23:20:01,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 23:20:01,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 23:20:01,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:20:01,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-12-01 23:20:01,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-01 23:20:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-01 23:20:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 23:20:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-01 23:20:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 23:20:01,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 23:20:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-01 23:20:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 23:20:02,442 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 23:20:02,442 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-01 23:20:02,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:20:02 BoogieIcfgContainer [2020-12-01 23:20:02,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 23:20:02,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 23:20:02,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 23:20:02,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 23:20:02,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 11:20:01" (1/3) ... [2020-12-01 23:20:02,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3312d02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:20:02, skipping insertion in model container [2020-12-01 23:20:02,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:01" (2/3) ... [2020-12-01 23:20:02,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3312d02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:20:02, skipping insertion in model container [2020-12-01 23:20:02,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:20:02" (3/3) ... [2020-12-01 23:20:02,455 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1012a.c [2020-12-01 23:20:02,471 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 23:20:02,475 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 23:20:02,486 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 23:20:02,524 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 23:20:02,526 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 23:20:02,526 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 23:20:02,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 23:20:02,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 23:20:02,528 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 23:20:02,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 23:20:02,529 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 23:20:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-01 23:20:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 23:20:02,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:20:02,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:20:02,561 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:20:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:20:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash -969083750, now seen corresponding path program 1 times [2020-12-01 23:20:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 23:20:02,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868863090] [2020-12-01 23:20:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-01 23:20:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:20:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-01 23:20:02,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 23:20:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 23:20:02,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-01 23:20:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 23:20:02,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868863090] [2020-12-01 23:20:02,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:20:02,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-01 23:20:02,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270030743] [2020-12-01 23:20:02,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 23:20:02,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-01 23:20:02,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 23:20:02,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:20:02,828 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-01 23:20:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:20:02,845 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-01 23:20:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 23:20:02,846 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-01 23:20:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:20:02,855 INFO L225 Difference]: With dead ends: 34 [2020-12-01 23:20:02,855 INFO L226 Difference]: Without dead ends: 15 [2020-12-01 23:20:02,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:20:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-01 23:20:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-01 23:20:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-01 23:20:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-12-01 23:20:02,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 11 [2020-12-01 23:20:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:20:02,893 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-12-01 23:20:02,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 23:20:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-12-01 23:20:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 23:20:02,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:20:02,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:20:03,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-01 23:20:03,113 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:20:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:20:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash 657368916, now seen corresponding path program 1 times [2020-12-01 23:20:03,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 23:20:03,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545364585] [2020-12-01 23:20:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-01 23:20:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:20:03,378 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:20:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:20:03,544 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:20:03,603 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-01 23:20:03,603 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 23:20:03,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-01 23:20:03,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 11:20:03 BoogieIcfgContainer [2020-12-01 23:20:03,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 23:20:03,840 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 23:20:03,840 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 23:20:03,841 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 23:20:03,841 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:20:02" (3/4) ... [2020-12-01 23:20:03,843 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 23:20:03,896 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-01 23:20:03,896 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 23:20:03,899 INFO L168 Benchmark]: Toolchain (without parser) took 2559.02 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.4 MB in the beginning and 22.1 MB in the end (delta: -681.7 kB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:03,899 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 44.0 MB. Free memory is still 28.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:20:03,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.32 ms. Allocated memory is still 44.0 MB. Free memory was 21.2 MB in the beginning and 23.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:03,901 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.26 ms. Allocated memory is still 44.0 MB. Free memory was 23.5 MB in the beginning and 21.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:20:03,902 INFO L168 Benchmark]: Boogie Preprocessor took 65.59 ms. Allocated memory is still 44.0 MB. Free memory was 21.7 MB in the beginning and 20.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:03,903 INFO L168 Benchmark]: RCFGBuilder took 605.75 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.2 MB in the beginning and 34.3 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:03,904 INFO L168 Benchmark]: TraceAbstraction took 1393.15 ms. Allocated memory is still 54.5 MB. Free memory was 34.1 MB in the beginning and 24.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:03,905 INFO L168 Benchmark]: Witness Printer took 55.86 ms. Allocated memory is still 54.5 MB. Free memory was 24.4 MB in the beginning and 22.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:03,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 44.0 MB. Free memory is still 28.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 378.32 ms. Allocated memory is still 44.0 MB. Free memory was 21.2 MB in the beginning and 23.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.26 ms. Allocated memory is still 44.0 MB. Free memory was 23.5 MB in the beginning and 21.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.59 ms. Allocated memory is still 44.0 MB. Free memory was 21.7 MB in the beginning and 20.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 605.75 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.2 MB in the beginning and 34.3 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1393.15 ms. Allocated memory is still 54.5 MB. Free memory was 34.1 MB in the beginning and 24.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Witness Printer took 55.86 ms. Allocated memory is still 54.5 MB. Free memory was 24.4 MB in the beginning and 22.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 75]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L70] double x = 1.0 / 0.0; [L47] __uint32_t high; [L49] ieee_double_shape_type gh_u; [L50] gh_u.value = (x) [L51] EXPR gh_u.parts.msw [L51] (high) = gh_u.parts.msw [L54] ieee_double_shape_type sh_u; [L55] sh_u.value = (x) [L56] sh_u.parts.msw = (high & 0x7fffffff) [L57] EXPR sh_u.value [L57] (x) = sh_u.value [L59] return x; [L71] double res = fabs_double(x); [L33] __int32_t hx, lx; [L35] ieee_double_shape_type ew_u; [L36] ew_u.value = (x) [L37] EXPR ew_u.parts.msw [L37] (hx) = ew_u.parts.msw [L38] EXPR ew_u.parts.lsw [L38] (lx) = ew_u.parts.lsw [L40] hx &= 0x7fffffff [L41] hx |= (__uint32_t)(lx | (-lx)) >> 31 [L42] hx = 0x7ff00000 - hx [L43] return 1 - (int)((__uint32_t)(hx | (-hx)) >> 31); [L74] COND TRUE !isinf_double(res) [L75] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 37 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...