./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1251b.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_1251b.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 0dca3295f12b1ef36cf31c463cf879069525072f .......................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_1251b.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 0dca3295f12b1ef36cf31c463cf879069525072f ........................................................................................................................................................................................................................................................................................................................................................... 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 23:21:05,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 23:21:05,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 23:21:05,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 23:21:05,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 23:21:05,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 23:21:05,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 23:21:05,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 23:21:05,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 23:21:05,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 23:21:05,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 23:21:05,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 23:21:05,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 23:21:05,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 23:21:05,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 23:21:05,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 23:21:05,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 23:21:05,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 23:21:05,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 23:21:05,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 23:21:05,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 23:21:05,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 23:21:05,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 23:21:05,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 23:21:05,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 23:21:05,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 23:21:05,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 23:21:05,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 23:21:05,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 23:21:05,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 23:21:05,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 23:21:05,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 23:21:05,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 23:21:05,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 23:21:05,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 23:21:05,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 23:21:05,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 23:21:05,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 23:21:05,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 23:21:05,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 23:21:05,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 23:21:05,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 23:21:05,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 23:21:05,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 23:21:05,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 23:21:05,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 23:21:05,443 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 23:21:05,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 23:21:05,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 23:21:05,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 23:21:05,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 23:21:05,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 23:21:05,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 23:21:05,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 23:21:05,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 23:21:05,446 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 23:21:05,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 23:21:05,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 23:21:05,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 23:21:05,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 23:21:05,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 23:21:05,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 23:21:05,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 23:21:05,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:21:05,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 23:21:05,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 23:21:05,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 23:21:05,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 23:21:05,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 23:21:05,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 23:21:05,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 23:21:05,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-12-01 23:21:05,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 23:21:05,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 23:21:05,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 23:21:05,946 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 23:21:05,948 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 23:21:05,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-12-01 23:21:06,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99282c7a8/0fd75eda921842be85e6874be820c835/FLAG518d5d7d3 [2020-12-01 23:21:06,712 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 23:21:06,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-12-01 23:21:06,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99282c7a8/0fd75eda921842be85e6874be820c835/FLAG518d5d7d3 [2020-12-01 23:21:07,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99282c7a8/0fd75eda921842be85e6874be820c835 [2020-12-01 23:21:07,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 23:21:07,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 23:21:07,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 23:21:07,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 23:21:07,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 23:21:07,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47c5e12c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07, skipping insertion in model container [2020-12-01 23:21:07,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 23:21:07,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 23:21:07,345 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_1251b.c[2080,2093] [2020-12-01 23:21:07,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:21:07,362 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 23:21:07,430 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_1251b.c[2080,2093] [2020-12-01 23:21:07,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:21:07,460 INFO L208 MainTranslator]: Completed translation [2020-12-01 23:21:07,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07 WrapperNode [2020-12-01 23:21:07,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 23:21:07,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 23:21:07,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 23:21:07,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 23:21:07,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 23:21:07,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 23:21:07,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 23:21:07,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 23:21:07,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (1/1) ... [2020-12-01 23:21:07,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 23:21:07,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 23:21:07,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 23:21:07,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 23:21:07,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (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 23:21:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 23:21:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 23:21:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-01 23:21:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 23:21:07,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 23:21:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 23:21:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 23:21:08,385 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 23:21:08,385 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-01 23:21:08,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:08 BoogieIcfgContainer [2020-12-01 23:21:08,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 23:21:08,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 23:21:08,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 23:21:08,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 23:21:08,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 11:21:07" (1/3) ... [2020-12-01 23:21:08,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e819c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:21:08, skipping insertion in model container [2020-12-01 23:21:08,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:07" (2/3) ... [2020-12-01 23:21:08,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e819c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:21:08, skipping insertion in model container [2020-12-01 23:21:08,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:08" (3/3) ... [2020-12-01 23:21:08,395 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-12-01 23:21:08,411 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 23:21:08,416 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 23:21:08,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 23:21:08,460 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 23:21:08,460 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 23:21:08,460 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 23:21:08,460 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 23:21:08,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 23:21:08,461 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 23:21:08,461 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 23:21:08,461 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 23:21:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-01 23:21:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 23:21:08,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:08,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:08,489 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-12-01 23:21:08,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:21:08,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848616579] [2020-12-01 23:21:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:21:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:21:08,687 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 23:21:08,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848616579] [2020-12-01 23:21:08,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:21:08,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 23:21:08,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570173035] [2020-12-01 23:21:08,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 23:21:08,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 23:21:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 23:21:08,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:21:08,720 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-01 23:21:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:21:08,749 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2020-12-01 23:21:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 23:21:08,750 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-01 23:21:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:21:08,776 INFO L225 Difference]: With dead ends: 56 [2020-12-01 23:21:08,776 INFO L226 Difference]: Without dead ends: 26 [2020-12-01 23:21:08,780 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 23:21:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-01 23:21:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-01 23:21:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-01 23:21:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-01 23:21:08,829 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-12-01 23:21:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:21:08,831 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-01 23:21:08,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 23:21:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-01 23:21:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 23:21:08,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:08,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:08,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 23:21:08,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:08,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-12-01 23:21:08,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:21:08,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001064756] [2020-12-01 23:21:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:21:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:21:08,965 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 23:21:08,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001064756] [2020-12-01 23:21:08,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:21:08,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 23:21:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205674793] [2020-12-01 23:21:08,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 23:21:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 23:21:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 23:21:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 23:21:08,969 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-12-01 23:21:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:21:09,023 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-12-01 23:21:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 23:21:09,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-01 23:21:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:21:09,025 INFO L225 Difference]: With dead ends: 40 [2020-12-01 23:21:09,025 INFO L226 Difference]: Without dead ends: 36 [2020-12-01 23:21:09,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 23:21:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-01 23:21:09,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-12-01 23:21:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 23:21:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-01 23:21:09,032 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-12-01 23:21:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:21:09,032 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-01 23:21:09,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 23:21:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-01 23:21:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 23:21:09,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:09,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:09,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 23:21:09,034 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:09,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-12-01 23:21:09,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:21:09,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387203991] [2020-12-01 23:21:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:21:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:21:09,162 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 23:21:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387203991] [2020-12-01 23:21:09,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:21:09,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 23:21:09,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345596713] [2020-12-01 23:21:09,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 23:21:09,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 23:21:09,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 23:21:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 23:21:09,165 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-12-01 23:21:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:21:09,225 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-12-01 23:21:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 23:21:09,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-01 23:21:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:21:09,226 INFO L225 Difference]: With dead ends: 42 [2020-12-01 23:21:09,227 INFO L226 Difference]: Without dead ends: 38 [2020-12-01 23:21:09,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 23:21:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-01 23:21:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-12-01 23:21:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 23:21:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-01 23:21:09,233 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-12-01 23:21:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:21:09,234 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-01 23:21:09,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 23:21:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-01 23:21:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 23:21:09,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:09,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:09,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 23:21:09,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:09,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-12-01 23:21:09,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:21:09,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984143160] [2020-12-01 23:21:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:21:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:21:09,289 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 23:21:09,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984143160] [2020-12-01 23:21:09,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:21:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 23:21:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3811339] [2020-12-01 23:21:09,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 23:21:09,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 23:21:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 23:21:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 23:21:09,292 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-12-01 23:21:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:21:09,345 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-12-01 23:21:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 23:21:09,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-01 23:21:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:21:09,347 INFO L225 Difference]: With dead ends: 44 [2020-12-01 23:21:09,347 INFO L226 Difference]: Without dead ends: 40 [2020-12-01 23:21:09,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 23:21:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-01 23:21:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-12-01 23:21:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 23:21:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-01 23:21:09,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-12-01 23:21:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:21:09,354 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-01 23:21:09,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 23:21:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-01 23:21:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 23:21:09,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:09,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:09,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-01 23:21:09,356 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-12-01 23:21:09,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:21:09,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510937050] [2020-12-01 23:21:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:21:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:21:09,412 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 23:21:09,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510937050] [2020-12-01 23:21:09,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:21:09,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 23:21:09,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534142630] [2020-12-01 23:21:09,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 23:21:09,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 23:21:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 23:21:09,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 23:21:09,415 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-12-01 23:21:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:21:09,485 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-12-01 23:21:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 23:21:09,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-01 23:21:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:21:09,490 INFO L225 Difference]: With dead ends: 42 [2020-12-01 23:21:09,491 INFO L226 Difference]: Without dead ends: 38 [2020-12-01 23:21:09,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 23:21:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-01 23:21:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-12-01 23:21:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 23:21:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-01 23:21:09,505 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-12-01 23:21:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:21:09,506 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-01 23:21:09,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 23:21:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-01 23:21:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 23:21:09,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:09,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:09,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-01 23:21:09,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:09,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-12-01 23:21:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:21:09,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063161764] [2020-12-01 23:21:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:21:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:21:09,553 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:21:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:21:09,579 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:21:09,606 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 23:21:09,606 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 23:21:09,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-01 23:21:09,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 11:21:09 BoogieIcfgContainer [2020-12-01 23:21:09,642 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 23:21:09,643 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 23:21:09,643 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 23:21:09,643 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 23:21:09,644 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:08" (3/4) ... [2020-12-01 23:21:09,651 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 23:21:09,651 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 23:21:09,654 INFO L168 Benchmark]: Toolchain (without parser) took 2580.39 ms. Allocated memory was 41.9 MB in the beginning and 60.8 MB in the end (delta: 18.9 MB). Free memory was 19.7 MB in the beginning and 43.2 MB in the end (delta: -23.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:09,655 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 22.4 MB in the beginning and 22.4 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:21:09,656 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.21 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 20.4 MB in the end (delta: -938.4 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:09,657 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.77 ms. Allocated memory is still 41.9 MB. Free memory was 20.3 MB in the beginning and 18.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:09,658 INFO L168 Benchmark]: Boogie Preprocessor took 91.35 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 18.6 MB in the beginning and 34.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:09,658 INFO L168 Benchmark]: RCFGBuilder took 733.23 ms. Allocated memory is still 50.3 MB. Free memory was 34.9 MB in the beginning and 26.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:09,659 INFO L168 Benchmark]: TraceAbstraction took 1253.29 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.1 MB in the beginning and 22.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:09,660 INFO L168 Benchmark]: Witness Printer took 8.39 ms. Allocated memory is still 60.8 MB. Free memory was 22.9 MB in the beginning and 43.2 MB in the end (delta: -20.3 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:09,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 22.4 MB in the beginning and 22.4 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 385.21 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 20.4 MB in the end (delta: -938.4 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 92.77 ms. Allocated memory is still 41.9 MB. Free memory was 20.3 MB in the beginning and 18.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 91.35 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 18.6 MB in the beginning and 34.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 733.23 ms. Allocated memory is still 50.3 MB. Free memory was 34.9 MB in the beginning and 26.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1253.29 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.1 MB in the beginning and 22.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Witness Printer took 8.39 ms. Allocated memory is still 60.8 MB. Free memory was 22.9 MB in the beginning and 43.2 MB in the end (delta: -20.3 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 79, overapproximation of someBinaryArithmeticDOUBLEoperation at line 67. Possible FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L80] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 40 SDslu, 242 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-096883e [2020-12-01 23:21:12,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 23:21:12,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 23:21:12,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 23:21:12,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 23:21:12,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 23:21:12,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 23:21:12,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 23:21:12,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 23:21:12,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 23:21:12,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 23:21:12,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 23:21:12,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 23:21:12,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 23:21:12,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 23:21:12,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 23:21:12,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 23:21:12,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 23:21:12,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 23:21:12,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 23:21:12,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 23:21:12,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 23:21:12,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 23:21:12,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 23:21:12,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 23:21:12,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 23:21:12,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 23:21:12,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 23:21:12,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 23:21:12,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 23:21:12,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 23:21:12,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 23:21:12,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 23:21:12,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 23:21:12,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 23:21:12,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 23:21:12,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 23:21:12,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 23:21:12,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 23:21:12,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 23:21:12,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 23:21:12,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-01 23:21:12,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 23:21:12,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 23:21:12,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 23:21:12,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 23:21:12,365 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 23:21:12,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 23:21:12,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 23:21:12,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 23:21:12,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 23:21:12,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 23:21:12,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 23:21:12,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 23:21:12,367 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-01 23:21:12,367 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-01 23:21:12,368 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 23:21:12,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 23:21:12,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 23:21:12,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 23:21:12,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 23:21:12,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 23:21:12,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 23:21:12,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 23:21:12,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:21:12,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 23:21:12,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 23:21:12,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 23:21:12,370 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-01 23:21:12,370 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-01 23:21:12,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 23:21:12,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 23:21:12,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-01 23:21:12,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-12-01 23:21:12,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 23:21:12,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 23:21:12,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 23:21:12,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 23:21:12,844 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 23:21:12,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-12-01 23:21:12,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e424906d/6915a63cadf04986beea673556b99f84/FLAG826741361 [2020-12-01 23:21:13,533 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 23:21:13,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-12-01 23:21:13,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e424906d/6915a63cadf04986beea673556b99f84/FLAG826741361 [2020-12-01 23:21:13,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e424906d/6915a63cadf04986beea673556b99f84 [2020-12-01 23:21:13,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 23:21:13,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 23:21:13,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 23:21:13,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 23:21:13,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 23:21:13,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:21:13" (1/1) ... [2020-12-01 23:21:13,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406fa9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:13, skipping insertion in model container [2020-12-01 23:21:13,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:21:13" (1/1) ... [2020-12-01 23:21:13,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 23:21:13,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 23:21:14,150 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_1251b.c[2080,2093] [2020-12-01 23:21:14,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:21:14,169 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 23:21:14,197 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_1251b.c[2080,2093] [2020-12-01 23:21:14,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:21:14,226 INFO L208 MainTranslator]: Completed translation [2020-12-01 23:21:14,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14 WrapperNode [2020-12-01 23:21:14,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 23:21:14,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 23:21:14,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 23:21:14,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 23:21:14,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 23:21:14,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 23:21:14,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 23:21:14,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 23:21:14,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (1/1) ... [2020-12-01 23:21:14,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 23:21:14,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 23:21:14,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 23:21:14,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 23:21:14,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (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 23:21:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-01 23:21:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-01 23:21:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 23:21:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-01 23:21:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 23:21:14,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 23:21:14,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 23:21:14,985 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 23:21:14,986 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-01 23:21:14,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:14 BoogieIcfgContainer [2020-12-01 23:21:14,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 23:21:14,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 23:21:14,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 23:21:14,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 23:21:14,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 11:21:13" (1/3) ... [2020-12-01 23:21:14,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28992b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:21:14, skipping insertion in model container [2020-12-01 23:21:14,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:14" (2/3) ... [2020-12-01 23:21:14,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28992b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:21:14, skipping insertion in model container [2020-12-01 23:21:14,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:14" (3/3) ... [2020-12-01 23:21:15,005 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-12-01 23:21:15,021 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 23:21:15,025 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 23:21:15,039 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 23:21:15,078 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 23:21:15,078 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 23:21:15,078 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 23:21:15,079 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 23:21:15,079 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 23:21:15,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 23:21:15,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 23:21:15,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 23:21:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-01 23:21:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 23:21:15,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:15,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:15,106 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-12-01 23:21:15,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 23:21:15,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689342332] [2020-12-01 23:21:15,132 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 23:21:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:21:15,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-01 23:21:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 23:21:15,405 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 23:21:15,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-01 23:21:15,423 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 23:21:15,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689342332] [2020-12-01 23:21:15,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:21:15,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-01 23:21:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630115072] [2020-12-01 23:21:15,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 23:21:15,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-01 23:21:15,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 23:21:15,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:21:15,449 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-01 23:21:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:21:15,470 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2020-12-01 23:21:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 23:21:15,471 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-01 23:21:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:21:15,482 INFO L225 Difference]: With dead ends: 56 [2020-12-01 23:21:15,482 INFO L226 Difference]: Without dead ends: 26 [2020-12-01 23:21:15,485 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 23:21:15,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-01 23:21:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-01 23:21:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-01 23:21:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-01 23:21:15,522 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-12-01 23:21:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:21:15,523 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-01 23:21:15,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 23:21:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-01 23:21:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 23:21:15,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:15,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:15,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-01 23:21:15,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:15,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-12-01 23:21:15,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 23:21:15,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404775812] [2020-12-01 23:21:15,742 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 23:21:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:21:15,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 23:21:15,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 23:21:15,905 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 23:21:15,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-01 23:21:15,932 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 23:21:15,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404775812] [2020-12-01 23:21:15,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:21:15,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-12-01 23:21:15,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039342016] [2020-12-01 23:21:15,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 23:21:15,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-01 23:21:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 23:21:15,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 23:21:15,936 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-12-01 23:21:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:21:16,069 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-12-01 23:21:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 23:21:16,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-01 23:21:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:21:16,071 INFO L225 Difference]: With dead ends: 50 [2020-12-01 23:21:16,072 INFO L226 Difference]: Without dead ends: 46 [2020-12-01 23:21:16,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-01 23:21:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-01 23:21:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-12-01 23:21:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 23:21:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-01 23:21:16,091 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-12-01 23:21:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:21:16,091 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-01 23:21:16,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 23:21:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-01 23:21:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 23:21:16,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:16,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:16,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-01 23:21:16,311 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:16,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-12-01 23:21:16,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 23:21:16,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124817068] [2020-12-01 23:21:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-01 23:21:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:21:16,469 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:21:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:21:16,565 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:21:16,607 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-01 23:21:16,607 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 23:21:16,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-01 23:21:16,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 11:21:16 BoogieIcfgContainer [2020-12-01 23:21:16,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 23:21:16,854 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 23:21:16,855 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 23:21:16,855 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 23:21:16,856 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:14" (3/4) ... [2020-12-01 23:21:16,858 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 23:21:16,909 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-01 23:21:16,909 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 23:21:16,911 INFO L168 Benchmark]: Toolchain (without parser) took 3015.91 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 21.2 MB in the beginning and 32.0 MB in the end (delta: -10.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:16,912 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 44.0 MB. Free memory was 26.9 MB in the beginning and 26.9 MB in the end (delta: 33.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:21:16,913 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.77 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.0 MB in the beginning and 39.4 MB in the end (delta: -18.4 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:16,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.37 ms. Allocated memory is still 54.5 MB. Free memory was 39.4 MB in the beginning and 37.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:21:16,915 INFO L168 Benchmark]: Boogie Preprocessor took 41.75 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 36.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:16,916 INFO L168 Benchmark]: RCFGBuilder took 654.58 ms. Allocated memory is still 54.5 MB. Free memory was 36.0 MB in the beginning and 30.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:16,917 INFO L168 Benchmark]: TraceAbstraction took 1861.75 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.3 MB in the beginning and 34.5 MB in the end (delta: -4.2 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:16,918 INFO L168 Benchmark]: Witness Printer took 54.73 ms. Allocated memory is still 67.1 MB. Free memory was 34.1 MB in the beginning and 32.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:16,923 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 44.0 MB. Free memory was 26.9 MB in the beginning and 26.9 MB in the end (delta: 33.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.77 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.0 MB in the beginning and 39.4 MB in the end (delta: -18.4 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.37 ms. Allocated memory is still 54.5 MB. Free memory was 39.4 MB in the beginning and 37.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.75 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 36.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 654.58 ms. Allocated memory is still 54.5 MB. Free memory was 36.0 MB in the beginning and 30.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1861.75 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.3 MB in the beginning and 34.5 MB in the end (delta: -4.2 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Witness Printer took 54.73 ms. Allocated memory is still 67.1 MB. Free memory was 34.1 MB in the beginning and 32.0 MB in the end (delta: 2.1 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: 80]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L80] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 64 SDs, 0 SdLazy, 23 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...