./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cbb939d5 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 ../../../trunk/examples/svcomp/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 ../../../trunk/examples/svcomp/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-cbb939d [2020-11-23 16:34:29,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-23 16:34:29,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-23 16:34:29,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-23 16:34:29,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-23 16:34:29,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-23 16:34:29,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-23 16:34:29,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-23 16:34:29,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-23 16:34:29,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-23 16:34:29,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-23 16:34:29,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-23 16:34:29,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-23 16:34:29,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-23 16:34:29,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-23 16:34:29,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-23 16:34:29,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-23 16:34:29,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-23 16:34:29,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-23 16:34:29,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-23 16:34:29,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-23 16:34:29,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-23 16:34:29,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-23 16:34:29,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-23 16:34:29,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-23 16:34:29,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-23 16:34:29,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-23 16:34:29,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-23 16:34:29,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-23 16:34:29,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-23 16:34:29,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-23 16:34:29,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-23 16:34:29,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-23 16:34:29,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-23 16:34:29,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-23 16:34:29,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-23 16:34:29,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-23 16:34:29,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-23 16:34:29,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-23 16:34:29,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-23 16:34:29,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-23 16:34:29,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-23 16:34:29,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-23 16:34:29,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-23 16:34:29,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-23 16:34:29,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-23 16:34:29,447 INFO L138 SettingsManager]: * Use SBE=true [2020-11-23 16:34:29,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-23 16:34:29,447 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-23 16:34:29,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-23 16:34:29,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-23 16:34:29,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-23 16:34:29,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-23 16:34:29,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-23 16:34:29,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-23 16:34:29,449 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-23 16:34:29,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-23 16:34:29,449 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-23 16:34:29,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-23 16:34:29,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-23 16:34:29,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-23 16:34:29,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-23 16:34:29,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-23 16:34:29,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-23 16:34:29,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-23 16:34:29,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-23 16:34:29,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-23 16:34:29,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-23 16:34:29,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-23 16:34:29,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-23 16:34:29,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-23 16:34:29,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-11-23 16:34:29,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-23 16:34:29,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-23 16:34:29,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-23 16:34:29,909 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-23 16:34:29,911 INFO L275 PluginConnector]: CDTParser initialized [2020-11-23 16:34:29,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c [2020-11-23 16:34:29,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09a428cd9/a5c1305a07ae4d6f966a60d6672dff85/FLAG45a4c6f2f [2020-11-23 16:34:30,676 INFO L306 CDTParser]: Found 1 translation units. [2020-11-23 16:34:30,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c [2020-11-23 16:34:30,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09a428cd9/a5c1305a07ae4d6f966a60d6672dff85/FLAG45a4c6f2f [2020-11-23 16:34:31,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09a428cd9/a5c1305a07ae4d6f966a60d6672dff85 [2020-11-23 16:34:31,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-23 16:34:31,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-23 16:34:31,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-23 16:34:31,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-23 16:34:31,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-23 16:34:31,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c4f3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31, skipping insertion in model container [2020-11-23 16:34:31,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-23 16:34:31,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-23 16:34:31,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-23 16:34:31,305 INFO L203 MainTranslator]: Completed pre-run [2020-11-23 16:34:31,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-23 16:34:31,358 INFO L208 MainTranslator]: Completed translation [2020-11-23 16:34:31,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31 WrapperNode [2020-11-23 16:34:31,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-23 16:34:31,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-23 16:34:31,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-23 16:34:31,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-23 16:34:31,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-23 16:34:31,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-23 16:34:31,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-23 16:34:31,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-23 16:34:31,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (1/1) ... [2020-11-23 16:34:31,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-23 16:34:31,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-23 16:34:31,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-23 16:34:31,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-23 16:34:31,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (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 [2020-11-23 16:34:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-23 16:34:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-23 16:34:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-23 16:34:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-23 16:34:31,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-23 16:34:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-23 16:34:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-23 16:34:32,206 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-23 16:34:32,207 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-23 16:34:32,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:34:32 BoogieIcfgContainer [2020-11-23 16:34:32,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-23 16:34:32,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-23 16:34:32,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-23 16:34:32,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-23 16:34:32,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:34:31" (1/3) ... [2020-11-23 16:34:32,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b316017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:34:32, skipping insertion in model container [2020-11-23 16:34:32,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:31" (2/3) ... [2020-11-23 16:34:32,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b316017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:34:32, skipping insertion in model container [2020-11-23 16:34:32,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:34:32" (3/3) ... [2020-11-23 16:34:32,225 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-11-23 16:34:32,243 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-23 16:34:32,247 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-23 16:34:32,261 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-23 16:34:32,310 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-23 16:34:32,310 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-23 16:34:32,310 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-23 16:34:32,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-23 16:34:32,311 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-23 16:34:32,311 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-23 16:34:32,311 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-23 16:34:32,311 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-23 16:34:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-23 16:34:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-23 16:34:32,342 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:32,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:32,344 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:32,353 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-11-23 16:34:32,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 16:34:32,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907421666] [2020-11-23 16:34:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 16:34:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 16:34:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:32,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907421666] [2020-11-23 16:34:32,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-23 16:34:32,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-23 16:34:32,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900869661] [2020-11-23 16:34:32,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-23 16:34:32,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 16:34:32,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-23 16:34:32,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-23 16:34:32,612 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-23 16:34:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 16:34:32,634 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-11-23 16:34:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-23 16:34:32,635 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-23 16:34:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 16:34:32,645 INFO L225 Difference]: With dead ends: 57 [2020-11-23 16:34:32,645 INFO L226 Difference]: Without dead ends: 26 [2020-11-23 16:34:32,648 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 [2020-11-23 16:34:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-23 16:34:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-23 16:34:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-23 16:34:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-11-23 16:34:32,687 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-11-23 16:34:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 16:34:32,688 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-11-23 16:34:32,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-23 16:34:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-11-23 16:34:32,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-23 16:34:32,689 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:32,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:32,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-23 16:34:32,690 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:32,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:32,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-11-23 16:34:32,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 16:34:32,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213212085] [2020-11-23 16:34:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 16:34:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 16:34:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:32,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213212085] [2020-11-23 16:34:32,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-23 16:34:32,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-23 16:34:32,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472996034] [2020-11-23 16:34:32,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-23 16:34:32,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 16:34:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-23 16:34:32,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-23 16:34:32,796 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-11-23 16:34:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 16:34:32,855 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-11-23 16:34:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-23 16:34:32,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-23 16:34:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 16:34:32,857 INFO L225 Difference]: With dead ends: 40 [2020-11-23 16:34:32,857 INFO L226 Difference]: Without dead ends: 36 [2020-11-23 16:34:32,858 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 [2020-11-23 16:34:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-23 16:34:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-11-23 16:34:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-23 16:34:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-23 16:34:32,865 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-11-23 16:34:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 16:34:32,865 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-23 16:34:32,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-23 16:34:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-23 16:34:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-23 16:34:32,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:32,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:32,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-23 16:34:32,867 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:32,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-11-23 16:34:32,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 16:34:32,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287378025] [2020-11-23 16:34:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 16:34:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 16:34:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:32,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287378025] [2020-11-23 16:34:32,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-23 16:34:32,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-23 16:34:32,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789733889] [2020-11-23 16:34:32,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-23 16:34:32,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 16:34:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-23 16:34:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-23 16:34:32,950 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-23 16:34:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 16:34:33,014 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-11-23 16:34:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-23 16:34:33,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-23 16:34:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 16:34:33,016 INFO L225 Difference]: With dead ends: 42 [2020-11-23 16:34:33,016 INFO L226 Difference]: Without dead ends: 38 [2020-11-23 16:34:33,017 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 [2020-11-23 16:34:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-23 16:34:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-11-23 16:34:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-23 16:34:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-23 16:34:33,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-11-23 16:34:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 16:34:33,024 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-23 16:34:33,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-23 16:34:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-23 16:34:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-23 16:34:33,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:33,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:33,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-23 16:34:33,026 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:33,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-11-23 16:34:33,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 16:34:33,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911763364] [2020-11-23 16:34:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 16:34:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 16:34:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:33,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911763364] [2020-11-23 16:34:33,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-23 16:34:33,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-23 16:34:33,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213549304] [2020-11-23 16:34:33,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-23 16:34:33,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 16:34:33,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-23 16:34:33,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-23 16:34:33,210 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-23 16:34:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 16:34:33,288 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-11-23 16:34:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-23 16:34:33,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-23 16:34:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 16:34:33,290 INFO L225 Difference]: With dead ends: 44 [2020-11-23 16:34:33,290 INFO L226 Difference]: Without dead ends: 40 [2020-11-23 16:34:33,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-23 16:34:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-23 16:34:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-11-23 16:34:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-23 16:34:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-23 16:34:33,300 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-11-23 16:34:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 16:34:33,300 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-23 16:34:33,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-23 16:34:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-23 16:34:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-23 16:34:33,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:33,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:33,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-23 16:34:33,302 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-11-23 16:34:33,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 16:34:33,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924489645] [2020-11-23 16:34:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 16:34:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 16:34:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:33,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924489645] [2020-11-23 16:34:33,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-23 16:34:33,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-23 16:34:33,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239100868] [2020-11-23 16:34:33,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-23 16:34:33,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 16:34:33,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-23 16:34:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-23 16:34:33,432 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-11-23 16:34:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 16:34:33,507 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-11-23 16:34:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-23 16:34:33,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-23 16:34:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 16:34:33,509 INFO L225 Difference]: With dead ends: 42 [2020-11-23 16:34:33,509 INFO L226 Difference]: Without dead ends: 38 [2020-11-23 16:34:33,510 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 [2020-11-23 16:34:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-23 16:34:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-11-23 16:34:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-23 16:34:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-23 16:34:33,517 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-11-23 16:34:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 16:34:33,517 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-23 16:34:33,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-23 16:34:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-23 16:34:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-23 16:34:33,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:33,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:33,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-23 16:34:33,520 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:33,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-11-23 16:34:33,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 16:34:33,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239427020] [2020-11-23 16:34:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 16:34:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-23 16:34:33,551 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-23 16:34:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-23 16:34:33,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-23 16:34:33,639 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-23 16:34:33,640 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-23 16:34:33,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-23 16:34:33,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 04:34:33 BoogieIcfgContainer [2020-11-23 16:34:33,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-23 16:34:33,687 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-23 16:34:33,687 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-23 16:34:33,688 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-23 16:34:33,688 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:34:32" (3/4) ... [2020-11-23 16:34:33,692 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-23 16:34:33,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-23 16:34:33,695 INFO L168 Benchmark]: Toolchain (without parser) took 2684.97 ms. Allocated memory was 46.1 MB in the beginning and 73.4 MB in the end (delta: 27.3 MB). Free memory was 22.7 MB in the beginning and 41.5 MB in the end (delta: -18.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:33,696 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 46.1 MB. Free memory is still 27.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 16:34:33,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.61 ms. Allocated memory was 46.1 MB in the beginning and 60.8 MB in the end (delta: 14.7 MB). Free memory was 22.1 MB in the beginning and 37.9 MB in the end (delta: -15.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:33,698 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.29 ms. Allocated memory is still 60.8 MB. Free memory was 37.9 MB in the beginning and 36.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:33,699 INFO L168 Benchmark]: Boogie Preprocessor took 33.31 ms. Allocated memory is still 60.8 MB. Free memory was 36.0 MB in the beginning and 34.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:33,700 INFO L168 Benchmark]: RCFGBuilder took 769.52 ms. Allocated memory is still 60.8 MB. Free memory was 34.4 MB in the beginning and 34.4 MB in the end (delta: 25.7 kB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:33,701 INFO L168 Benchmark]: TraceAbstraction took 1471.46 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 33.8 MB in the beginning and 42.0 MB in the end (delta: -8.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:33,702 INFO L168 Benchmark]: Witness Printer took 4.99 ms. Allocated memory is still 73.4 MB. Free memory was 42.0 MB in the beginning and 41.5 MB in the end (delta: 497.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 16:34:33,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 46.1 MB. Free memory is still 27.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.61 ms. Allocated memory was 46.1 MB in the beginning and 60.8 MB in the end (delta: 14.7 MB). Free memory was 22.1 MB in the beginning and 37.9 MB in the end (delta: -15.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.29 ms. Allocated memory is still 60.8 MB. Free memory was 37.9 MB in the beginning and 36.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.31 ms. Allocated memory is still 60.8 MB. Free memory was 36.0 MB in the beginning and 34.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 769.52 ms. Allocated memory is still 60.8 MB. Free memory was 34.4 MB in the beginning and 34.4 MB in the end (delta: 25.7 kB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1471.46 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 33.8 MB in the beginning and 42.0 MB in the end (delta: -8.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.99 ms. Allocated memory is still 73.4 MB. Free memory was 42.0 MB in the beginning and 41.5 MB in the end (delta: 497.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of 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 [L3] __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 0.3s 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-cbb939d [2020-11-23 16:34:36,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-23 16:34:36,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-23 16:34:36,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-23 16:34:36,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-23 16:34:36,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-23 16:34:36,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-23 16:34:36,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-23 16:34:36,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-23 16:34:36,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-23 16:34:36,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-23 16:34:36,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-23 16:34:36,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-23 16:34:36,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-23 16:34:36,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-23 16:34:36,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-23 16:34:36,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-23 16:34:36,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-23 16:34:36,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-23 16:34:36,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-23 16:34:36,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-23 16:34:36,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-23 16:34:36,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-23 16:34:36,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-23 16:34:36,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-23 16:34:36,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-23 16:34:36,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-23 16:34:36,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-23 16:34:36,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-23 16:34:36,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-23 16:34:36,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-23 16:34:36,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-23 16:34:36,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-23 16:34:36,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-23 16:34:36,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-23 16:34:36,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-23 16:34:36,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-23 16:34:36,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-23 16:34:36,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-23 16:34:36,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-23 16:34:36,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-23 16:34:36,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-23 16:34:36,516 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-23 16:34:36,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-23 16:34:36,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-23 16:34:36,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-23 16:34:36,520 INFO L138 SettingsManager]: * Use SBE=true [2020-11-23 16:34:36,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-23 16:34:36,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-23 16:34:36,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-23 16:34:36,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-23 16:34:36,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-23 16:34:36,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-23 16:34:36,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-23 16:34:36,523 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-23 16:34:36,523 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-23 16:34:36,523 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-23 16:34:36,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-23 16:34:36,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-23 16:34:36,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-23 16:34:36,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-23 16:34:36,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-23 16:34:36,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-23 16:34:36,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-23 16:34:36,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-23 16:34:36,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-23 16:34:36,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-23 16:34:36,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-23 16:34:36,526 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-23 16:34:36,526 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-23 16:34:36,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-23 16:34:36,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-23 16:34:36,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-23 16:34:36,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-11-23 16:34:36,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-23 16:34:36,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-23 16:34:36,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-23 16:34:36,979 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-23 16:34:36,980 INFO L275 PluginConnector]: CDTParser initialized [2020-11-23 16:34:36,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c [2020-11-23 16:34:37,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4be5acd9/c7792ea04a594a5b9f664f6122ae048e/FLAGc4a77c592 [2020-11-23 16:34:37,673 INFO L306 CDTParser]: Found 1 translation units. [2020-11-23 16:34:37,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c [2020-11-23 16:34:37,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4be5acd9/c7792ea04a594a5b9f664f6122ae048e/FLAGc4a77c592 [2020-11-23 16:34:38,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4be5acd9/c7792ea04a594a5b9f664f6122ae048e [2020-11-23 16:34:38,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-23 16:34:38,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-23 16:34:38,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-23 16:34:38,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-23 16:34:38,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-23 16:34:38,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc44240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38, skipping insertion in model container [2020-11-23 16:34:38,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-23 16:34:38,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-23 16:34:38,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-23 16:34:38,347 INFO L203 MainTranslator]: Completed pre-run [2020-11-23 16:34:38,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-23 16:34:38,403 INFO L208 MainTranslator]: Completed translation [2020-11-23 16:34:38,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38 WrapperNode [2020-11-23 16:34:38,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-23 16:34:38,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-23 16:34:38,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-23 16:34:38,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-23 16:34:38,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-23 16:34:38,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-23 16:34:38,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-23 16:34:38,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-23 16:34:38,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (1/1) ... [2020-11-23 16:34:38,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-23 16:34:38,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-23 16:34:38,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-23 16:34:38,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-23 16:34:38,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (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 [2020-11-23 16:34:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-23 16:34:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-23 16:34:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-23 16:34:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-23 16:34:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-23 16:34:38,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-23 16:34:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-23 16:34:39,138 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-23 16:34:39,138 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-23 16:34:39,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:34:39 BoogieIcfgContainer [2020-11-23 16:34:39,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-23 16:34:39,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-23 16:34:39,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-23 16:34:39,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-23 16:34:39,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:34:38" (1/3) ... [2020-11-23 16:34:39,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1633a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:34:39, skipping insertion in model container [2020-11-23 16:34:39,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:34:38" (2/3) ... [2020-11-23 16:34:39,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1633a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:34:39, skipping insertion in model container [2020-11-23 16:34:39,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:34:39" (3/3) ... [2020-11-23 16:34:39,151 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-11-23 16:34:39,170 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-23 16:34:39,175 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-23 16:34:39,190 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-23 16:34:39,221 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-23 16:34:39,221 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-23 16:34:39,222 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-23 16:34:39,222 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-23 16:34:39,222 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-23 16:34:39,222 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-23 16:34:39,223 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-23 16:34:39,223 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-23 16:34:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-23 16:34:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-23 16:34:39,246 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:39,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:39,247 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:39,254 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-11-23 16:34:39,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-23 16:34:39,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642762161] [2020-11-23 16:34:39,277 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 [2020-11-23 16:34:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 16:34:39,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-23 16:34:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 16:34:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:39,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-23 16:34:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:39,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642762161] [2020-11-23 16:34:39,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-23 16:34:39,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-23 16:34:39,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148370005] [2020-11-23 16:34:39,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-23 16:34:39,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-23 16:34:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-23 16:34:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-23 16:34:39,553 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-23 16:34:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 16:34:39,574 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-11-23 16:34:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-23 16:34:39,576 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-23 16:34:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 16:34:39,587 INFO L225 Difference]: With dead ends: 57 [2020-11-23 16:34:39,587 INFO L226 Difference]: Without dead ends: 26 [2020-11-23 16:34:39,591 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 [2020-11-23 16:34:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-23 16:34:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-23 16:34:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-23 16:34:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-11-23 16:34:39,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-11-23 16:34:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 16:34:39,643 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-11-23 16:34:39,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-23 16:34:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-11-23 16:34:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-23 16:34:39,644 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:39,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:39,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-23 16:34:39,859 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-11-23 16:34:39,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-23 16:34:39,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253091469] [2020-11-23 16:34:39,864 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 [2020-11-23 16:34:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 16:34:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-23 16:34:40,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 16:34:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:40,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-23 16:34:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 16:34:40,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253091469] [2020-11-23 16:34:40,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-23 16:34:40,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-23 16:34:40,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793142651] [2020-11-23 16:34:40,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-23 16:34:40,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-23 16:34:40,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-23 16:34:40,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-23 16:34:40,071 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-11-23 16:34:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 16:34:40,218 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-11-23 16:34:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-23 16:34:40,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-23 16:34:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 16:34:40,220 INFO L225 Difference]: With dead ends: 50 [2020-11-23 16:34:40,221 INFO L226 Difference]: Without dead ends: 46 [2020-11-23 16:34:40,222 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 [2020-11-23 16:34:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-23 16:34:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-11-23 16:34:40,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-23 16:34:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-11-23 16:34:40,231 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-11-23 16:34:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 16:34:40,232 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-11-23 16:34:40,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-23 16:34:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-11-23 16:34:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-23 16:34:40,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 16:34:40,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-23 16:34:40,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-23 16:34:40,448 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 16:34:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 16:34:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-11-23 16:34:40,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-23 16:34:40,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856318279] [2020-11-23 16:34:40,454 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 [2020-11-23 16:34:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-23 16:34:40,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-23 16:34:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-23 16:34:40,700 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-23 16:34:40,743 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-23 16:34:40,744 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-23 16:34:40,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-23 16:34:40,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 04:34:40 BoogieIcfgContainer [2020-11-23 16:34:40,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-23 16:34:40,991 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-23 16:34:40,991 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-23 16:34:40,992 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-23 16:34:40,992 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:34:39" (3/4) ... [2020-11-23 16:34:40,994 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-23 16:34:41,045 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-11-23 16:34:41,045 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-23 16:34:41,048 INFO L168 Benchmark]: Toolchain (without parser) took 3014.82 ms. Allocated memory was 41.9 MB in the beginning and 60.8 MB in the end (delta: 18.9 MB). Free memory was 25.1 MB in the beginning and 39.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:41,048 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 41.9 MB. Free memory is still 21.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 16:34:41,050 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.86 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 24.5 MB in the beginning and 26.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:41,050 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.52 ms. Allocated memory is still 50.3 MB. Free memory was 26.7 MB in the beginning and 24.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 16:34:41,051 INFO L168 Benchmark]: Boogie Preprocessor took 45.23 ms. Allocated memory is still 50.3 MB. Free memory was 24.7 MB in the beginning and 23.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:41,052 INFO L168 Benchmark]: RCFGBuilder took 633.62 ms. Allocated memory is still 50.3 MB. Free memory was 23.1 MB in the beginning and 26.7 MB in the end (delta: -3.5 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:41,053 INFO L168 Benchmark]: TraceAbstraction took 1847.97 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.3 MB in the beginning and 42.3 MB in the end (delta: -16.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:41,054 INFO L168 Benchmark]: Witness Printer took 54.23 ms. Allocated memory is still 60.8 MB. Free memory was 42.3 MB in the beginning and 39.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-23 16:34:41,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 41.9 MB. Free memory is still 21.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.86 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 24.5 MB in the beginning and 26.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.52 ms. Allocated memory is still 50.3 MB. Free memory was 26.7 MB in the beginning and 24.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.23 ms. Allocated memory is still 50.3 MB. Free memory was 24.7 MB in the beginning and 23.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 633.62 ms. Allocated memory is still 50.3 MB. Free memory was 23.1 MB in the beginning and 26.7 MB in the end (delta: -3.5 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1847.97 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.3 MB in the beginning and 42.3 MB in the end (delta: -16.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Witness Printer took 54.23 ms. Allocated memory is still 60.8 MB. Free memory was 42.3 MB in the beginning and 39.8 MB in the end (delta: 2.5 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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 [L3] __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 98 SDs, 0 SdLazy, 27 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=31occurred 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...