./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e1a00cf 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/float_req_bl_1232b.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 38561929b5142acce65cab4da64e7c4ae5f17524 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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/float_req_bl_1232b.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 38561929b5142acce65cab4da64e7c4ae5f17524 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-0e1a00c [2020-11-29 15:55:01,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 15:55:01,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 15:55:01,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 15:55:01,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 15:55:01,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 15:55:01,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 15:55:01,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 15:55:01,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 15:55:01,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 15:55:01,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 15:55:01,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 15:55:01,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 15:55:01,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 15:55:01,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 15:55:01,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 15:55:01,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 15:55:01,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 15:55:01,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 15:55:01,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 15:55:01,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 15:55:01,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 15:55:01,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 15:55:01,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 15:55:01,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 15:55:01,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 15:55:01,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 15:55:01,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 15:55:01,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 15:55:01,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 15:55:01,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 15:55:01,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 15:55:01,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 15:55:01,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 15:55:01,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 15:55:01,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 15:55:01,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 15:55:01,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 15:55:01,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 15:55:01,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 15:55:01,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 15:55:01,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 15:55:01,779 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 15:55:01,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 15:55:01,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 15:55:01,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 15:55:01,785 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 15:55:01,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 15:55:01,785 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 15:55:01,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 15:55:01,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 15:55:01,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 15:55:01,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 15:55:01,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 15:55:01,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 15:55:01,788 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 15:55:01,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 15:55:01,789 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 15:55:01,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 15:55:01,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 15:55:01,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 15:55:01,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 15:55:01,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 15:55:01,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 15:55:01,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 15:55:01,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 15:55:01,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 15:55:01,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 15:55:01,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 15:55:01,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 15:55:01,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 15:55:01,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-11-29 15:55:02,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 15:55:02,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 15:55:02,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 15:55:02,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 15:55:02,277 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 15:55:02,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-11-29 15:55:02,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498e2cec3/b06c0036661e42c180bfad5a2333437f/FLAGb4aee7a67 [2020-11-29 15:55:03,045 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 15:55:03,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-11-29 15:55:03,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498e2cec3/b06c0036661e42c180bfad5a2333437f/FLAGb4aee7a67 [2020-11-29 15:55:03,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498e2cec3/b06c0036661e42c180bfad5a2333437f [2020-11-29 15:55:03,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 15:55:03,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 15:55:03,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:03,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 15:55:03,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 15:55:03,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27be4c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03, skipping insertion in model container [2020-11-29 15:55:03,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 15:55:03,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 15:55:03,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:03,657 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 15:55:03,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:03,702 INFO L208 MainTranslator]: Completed translation [2020-11-29 15:55:03,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03 WrapperNode [2020-11-29 15:55:03,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:03,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:03,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 15:55:03,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 15:55:03,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:03,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 15:55:03,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 15:55:03,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 15:55:03,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (1/1) ... [2020-11-29 15:55:03,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 15:55:03,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 15:55:03,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 15:55:03,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 15:55:03,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (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 [2020-11-29 15:55:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 15:55:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 15:55:03,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-29 15:55:03,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 15:55:03,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 15:55:03,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 15:55:03,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 15:55:04,620 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 15:55:04,620 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 15:55:04,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:04 BoogieIcfgContainer [2020-11-29 15:55:04,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 15:55:04,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 15:55:04,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 15:55:04,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 15:55:04,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:55:03" (1/3) ... [2020-11-29 15:55:04,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72834991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:04, skipping insertion in model container [2020-11-29 15:55:04,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:03" (2/3) ... [2020-11-29 15:55:04,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72834991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:04, skipping insertion in model container [2020-11-29 15:55:04,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:04" (3/3) ... [2020-11-29 15:55:04,632 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-11-29 15:55:04,647 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 15:55:04,653 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 15:55:04,668 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 15:55:04,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 15:55:04,699 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 15:55:04,699 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 15:55:04,699 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 15:55:04,699 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 15:55:04,700 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 15:55:04,700 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 15:55:04,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 15:55:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 15:55:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 15:55:04,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:04,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:04,723 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-29 15:55:04,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:04,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209569420] [2020-11-29 15:55:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:04,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209569420] [2020-11-29 15:55:04,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:04,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 15:55:04,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282337240] [2020-11-29 15:55:04,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 15:55:04,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:04,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 15:55:04,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 15:55:04,948 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 15:55:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:04,972 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-29 15:55:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 15:55:04,974 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 15:55:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:04,985 INFO L225 Difference]: With dead ends: 63 [2020-11-29 15:55:04,986 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 15:55:04,990 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 [2020-11-29 15:55:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 15:55:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 15:55:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 15:55:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-29 15:55:05,033 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-29 15:55:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:05,034 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-29 15:55:05,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 15:55:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-29 15:55:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 15:55:05,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:05,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:05,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 15:55:05,037 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-29 15:55:05,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:05,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267367689] [2020-11-29 15:55:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:05,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267367689] [2020-11-29 15:55:05,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:05,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:05,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412486810] [2020-11-29 15:55:05,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:05,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:05,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:05,139 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-11-29 15:55:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:05,246 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-11-29 15:55:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:05,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 15:55:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:05,249 INFO L225 Difference]: With dead ends: 53 [2020-11-29 15:55:05,249 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 15:55:05,250 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 [2020-11-29 15:55:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 15:55:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-11-29 15:55:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:05,259 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-29 15:55:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:05,259 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:05,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:05,260 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 15:55:05,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:05,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:05,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 15:55:05,262 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-11-29 15:55:05,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:05,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128478733] [2020-11-29 15:55:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:05,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128478733] [2020-11-29 15:55:05,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:05,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:05,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430285402] [2020-11-29 15:55:05,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:05,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:05,373 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:05,457 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-11-29 15:55:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:05,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 15:55:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:05,459 INFO L225 Difference]: With dead ends: 55 [2020-11-29 15:55:05,460 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 15:55:05,461 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 [2020-11-29 15:55:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 15:55:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-11-29 15:55:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:05,468 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-11-29 15:55:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:05,468 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:05,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 15:55:05,469 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:05,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:05,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 15:55:05,470 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:05,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-11-29 15:55:05,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:05,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963239168] [2020-11-29 15:55:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:05,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963239168] [2020-11-29 15:55:05,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:05,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:05,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142469386] [2020-11-29 15:55:05,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:05,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:05,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:05,537 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:05,687 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-11-29 15:55:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:05,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 15:55:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:05,693 INFO L225 Difference]: With dead ends: 57 [2020-11-29 15:55:05,693 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 15:55:05,694 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 [2020-11-29 15:55:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 15:55:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-11-29 15:55:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:05,711 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-11-29 15:55:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:05,711 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:05,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:05,713 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:05,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:05,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 15:55:05,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:05,717 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-11-29 15:55:05,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:05,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138485844] [2020-11-29 15:55:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:05,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138485844] [2020-11-29 15:55:05,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:05,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:05,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630930165] [2020-11-29 15:55:05,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:05,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:05,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:05,840 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:05,916 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-11-29 15:55:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:05,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 15:55:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:05,919 INFO L225 Difference]: With dead ends: 55 [2020-11-29 15:55:05,919 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 15:55:05,919 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 [2020-11-29 15:55:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 15:55:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-11-29 15:55:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:05,924 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-11-29 15:55:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:05,925 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:05,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:05,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:05,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:05,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 15:55:05,927 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:05,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-29 15:55:05,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:05,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572995496] [2020-11-29 15:55:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:05,952 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:05,974 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:06,003 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 15:55:06,004 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 15:55:06,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 15:55:06,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:55:06 BoogieIcfgContainer [2020-11-29 15:55:06,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 15:55:06,058 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 15:55:06,058 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 15:55:06,058 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 15:55:06,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:04" (3/4) ... [2020-11-29 15:55:06,062 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 15:55:06,064 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 15:55:06,066 INFO L168 Benchmark]: Toolchain (without parser) took 2684.83 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 25.5 MB in the beginning and 23.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:06,067 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory is still 34.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:06,068 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.40 ms. Allocated memory is still 48.2 MB. Free memory was 24.9 MB in the beginning and 25.9 MB in the end (delta: -945.0 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:06,069 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.05 ms. Allocated memory is still 48.2 MB. Free memory was 25.9 MB in the beginning and 24.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:06,070 INFO L168 Benchmark]: Boogie Preprocessor took 73.82 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 22.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:06,071 INFO L168 Benchmark]: RCFGBuilder took 781.11 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 22.6 MB in the beginning and 31.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:06,072 INFO L168 Benchmark]: TraceAbstraction took 1432.63 ms. Allocated memory is still 60.8 MB. Free memory was 30.6 MB in the beginning and 23.9 MB in the end (delta: 6.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:06,073 INFO L168 Benchmark]: Witness Printer took 6.04 ms. Allocated memory is still 60.8 MB. Free memory was 23.9 MB in the beginning and 23.5 MB in the end (delta: 416.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:06,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory is still 34.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.40 ms. Allocated memory is still 48.2 MB. Free memory was 24.9 MB in the beginning and 25.9 MB in the end (delta: -945.0 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.05 ms. Allocated memory is still 48.2 MB. Free memory was 25.9 MB in the beginning and 24.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.82 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 22.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 781.11 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 22.6 MB in the beginning and 31.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1432.63 ms. Allocated memory is still 60.8 MB. Free memory was 30.6 MB in the beginning and 23.9 MB in the end (delta: 6.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Witness Printer took 6.04 ms. Allocated memory is still 60.8 MB. Free memory was 23.9 MB in the beginning and 23.5 MB in the end (delta: 416.4 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 someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L3] __assert_fail("0", "float_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s 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=33occurred 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, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 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 0.2.0-0e1a00c [2020-11-29 15:55:08,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 15:55:08,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 15:55:08,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 15:55:08,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 15:55:08,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 15:55:08,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 15:55:08,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 15:55:08,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 15:55:08,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 15:55:08,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 15:55:08,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 15:55:08,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 15:55:08,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 15:55:08,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 15:55:08,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 15:55:08,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 15:55:08,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 15:55:08,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 15:55:08,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 15:55:08,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 15:55:08,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 15:55:08,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 15:55:08,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 15:55:08,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 15:55:08,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 15:55:08,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 15:55:08,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 15:55:08,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 15:55:08,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 15:55:08,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 15:55:08,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 15:55:08,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 15:55:08,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 15:55:08,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 15:55:08,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 15:55:08,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 15:55:08,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 15:55:08,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 15:55:08,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 15:55:08,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 15:55:08,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 15:55:08,802 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 15:55:08,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 15:55:08,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 15:55:08,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 15:55:08,804 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 15:55:08,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 15:55:08,805 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 15:55:08,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 15:55:08,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 15:55:08,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 15:55:08,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 15:55:08,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 15:55:08,806 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 15:55:08,806 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 15:55:08,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 15:55:08,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 15:55:08,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 15:55:08,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 15:55:08,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 15:55:08,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 15:55:08,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 15:55:08,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 15:55:08,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 15:55:08,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 15:55:08,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 15:55:08,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 15:55:08,809 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 15:55:08,809 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 15:55:08,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 15:55:08,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 15:55:08,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 15:55:08,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-11-29 15:55:09,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 15:55:09,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 15:55:09,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 15:55:09,287 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 15:55:09,290 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 15:55:09,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-11-29 15:55:09,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2c0a2e05/4b1907031ada4b489f6ccf41648191ef/FLAG8ce4216a9 [2020-11-29 15:55:10,027 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 15:55:10,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-11-29 15:55:10,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2c0a2e05/4b1907031ada4b489f6ccf41648191ef/FLAG8ce4216a9 [2020-11-29 15:55:10,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2c0a2e05/4b1907031ada4b489f6ccf41648191ef [2020-11-29 15:55:10,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 15:55:10,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 15:55:10,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:10,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 15:55:10,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 15:55:10,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dba055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10, skipping insertion in model container [2020-11-29 15:55:10,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 15:55:10,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 15:55:10,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:10,681 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 15:55:10,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:10,778 INFO L208 MainTranslator]: Completed translation [2020-11-29 15:55:10,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10 WrapperNode [2020-11-29 15:55:10,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:10,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:10,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 15:55:10,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 15:55:10,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:10,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 15:55:10,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 15:55:10,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 15:55:10,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (1/1) ... [2020-11-29 15:55:10,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 15:55:10,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 15:55:10,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 15:55:10,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 15:55:10,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (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 [2020-11-29 15:55:11,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 15:55:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 15:55:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 15:55:11,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 15:55:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 15:55:11,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-11-29 15:55:11,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 15:55:11,621 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 15:55:11,621 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 15:55:11,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:11 BoogieIcfgContainer [2020-11-29 15:55:11,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 15:55:11,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 15:55:11,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 15:55:11,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 15:55:11,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:55:10" (1/3) ... [2020-11-29 15:55:11,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41be773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:11, skipping insertion in model container [2020-11-29 15:55:11,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:10" (2/3) ... [2020-11-29 15:55:11,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41be773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:11, skipping insertion in model container [2020-11-29 15:55:11,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:11" (3/3) ... [2020-11-29 15:55:11,634 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-11-29 15:55:11,650 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 15:55:11,653 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 15:55:11,666 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 15:55:11,695 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 15:55:11,695 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 15:55:11,696 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 15:55:11,696 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 15:55:11,696 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 15:55:11,696 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 15:55:11,696 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 15:55:11,697 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 15:55:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 15:55:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 15:55:11,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:11,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:11,720 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:11,727 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-29 15:55:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:11,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362582548] [2020-11-29 15:55:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 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 [2020-11-29 15:55:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 15:55:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:11,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:11,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362582548] [2020-11-29 15:55:11,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:11,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 15:55:11,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527644357] [2020-11-29 15:55:11,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 15:55:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:11,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 15:55:11,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 15:55:11,919 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 15:55:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:11,940 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-29 15:55:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 15:55:11,941 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 15:55:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:11,952 INFO L225 Difference]: With dead ends: 63 [2020-11-29 15:55:11,953 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 15:55:11,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 15:55:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 15:55:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 15:55:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 15:55:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-29 15:55:12,000 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-29 15:55:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:12,000 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-29 15:55:12,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 15:55:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-29 15:55:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 15:55:12,001 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:12,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:12,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 15:55:12,214 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-29 15:55:12,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:12,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293039263] [2020-11-29 15:55:12,218 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 [2020-11-29 15:55:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:12,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 15:55:12,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:12,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:12,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293039263] [2020-11-29 15:55:12,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:12,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 15:55:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651673443] [2020-11-29 15:55:12,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 15:55:12,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:12,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 15:55:12,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 15:55:12,405 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-11-29 15:55:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:12,503 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-11-29 15:55:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 15:55:12,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-29 15:55:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:12,505 INFO L225 Difference]: With dead ends: 68 [2020-11-29 15:55:12,505 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 15:55:12,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 15:55:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 15:55:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-11-29 15:55:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:12,515 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-29 15:55:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:12,515 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:12,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 15:55:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:12,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:12,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:12,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 15:55:12,732 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-29 15:55:12,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:12,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318357243] [2020-11-29 15:55:12,735 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 [2020-11-29 15:55:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:12,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 15:55:12,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:12,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:12,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318357243] [2020-11-29 15:55:12,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:12,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-29 15:55:12,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004938619] [2020-11-29 15:55:12,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:12,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:12,928 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:12,984 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-11-29 15:55:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:12,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 15:55:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:12,986 INFO L225 Difference]: With dead ends: 52 [2020-11-29 15:55:12,986 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 15:55:12,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 15:55:12,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 15:55:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 15:55:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 15:55:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-11-29 15:55:12,992 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-11-29 15:55:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:12,992 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-11-29 15:55:12,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-11-29 15:55:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 15:55:12,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:12,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:13,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 15:55:13,208 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-11-29 15:55:13,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:13,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78622475] [2020-11-29 15:55:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:13,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 15:55:13,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:13,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:13,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78622475] [2020-11-29 15:55:13,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:13,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 15:55:13,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585547365] [2020-11-29 15:55:13,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 15:55:13,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 15:55:13,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 15:55:13,357 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-11-29 15:55:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:13,423 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-11-29 15:55:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 15:55:13,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 15:55:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:13,424 INFO L225 Difference]: With dead ends: 61 [2020-11-29 15:55:13,425 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 15:55:13,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 15:55:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 15:55:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-11-29 15:55:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 15:55:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-29 15:55:13,431 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-11-29 15:55:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:13,431 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-29 15:55:13,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 15:55:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-11-29 15:55:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 15:55:13,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:13,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:13,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 15:55:13,646 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:13,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:13,647 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-11-29 15:55:13,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:13,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116555615] [2020-11-29 15:55:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:13,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 15:55:13,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:13,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:13,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116555615] [2020-11-29 15:55:13,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:13,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-29 15:55:13,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456402657] [2020-11-29 15:55:13,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:13,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:13,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:13,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:13,815 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-11-29 15:55:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:13,828 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-11-29 15:55:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 15:55:13,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 15:55:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:13,830 INFO L225 Difference]: With dead ends: 38 [2020-11-29 15:55:13,830 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 15:55:13,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 15:55:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 15:55:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 15:55:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-29 15:55:13,846 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-11-29 15:55:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:13,847 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-29 15:55:13,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-29 15:55:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 15:55:13,848 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:13,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:14,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 15:55:14,064 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:14,065 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-11-29 15:55:14,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:14,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19066898] [2020-11-29 15:55:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:14,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 15:55:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:14,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:14,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19066898] [2020-11-29 15:55:14,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:14,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-11-29 15:55:14,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549263264] [2020-11-29 15:55:14,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 15:55:14,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 15:55:14,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 15:55:14,317 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-11-29 15:55:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:14,447 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-29 15:55:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 15:55:14,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-11-29 15:55:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:14,450 INFO L225 Difference]: With dead ends: 40 [2020-11-29 15:55:14,451 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 15:55:14,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-29 15:55:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 15:55:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-29 15:55:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 15:55:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-29 15:55:14,464 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-11-29 15:55:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:14,464 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-29 15:55:14,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 15:55:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-29 15:55:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 15:55:14,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:14,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:14,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-29 15:55:14,672 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:14,673 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-11-29 15:55:14,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:14,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430981310] [2020-11-29 15:55:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 15:55:14,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:14,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:14,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430981310] [2020-11-29 15:55:14,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:14,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-29 15:55:14,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117315227] [2020-11-29 15:55:14,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 15:55:14,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:14,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 15:55:14,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 15:55:14,846 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-11-29 15:55:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:14,900 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-11-29 15:55:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 15:55:14,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-29 15:55:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:14,902 INFO L225 Difference]: With dead ends: 43 [2020-11-29 15:55:14,902 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 15:55:14,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 15:55:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 15:55:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 15:55:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 15:55:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-11-29 15:55:14,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-11-29 15:55:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:14,907 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-11-29 15:55:14,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 15:55:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-11-29 15:55:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 15:55:14,907 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:14,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:15,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-29 15:55:15,124 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:15,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-11-29 15:55:15,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:15,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802855196] [2020-11-29 15:55:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:15,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:15,389 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:15,444 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 15:55:15,445 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 15:55:15,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-29 15:55:15,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:55:15 BoogieIcfgContainer [2020-11-29 15:55:15,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 15:55:15,726 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 15:55:15,726 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 15:55:15,726 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 15:55:15,727 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:11" (3/4) ... [2020-11-29 15:55:15,729 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 15:55:15,825 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-11-29 15:55:15,826 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 15:55:15,831 INFO L168 Benchmark]: Toolchain (without parser) took 5420.27 ms. Allocated memory was 41.9 MB in the beginning and 60.8 MB in the end (delta: 18.9 MB). Free memory was 27.4 MB in the beginning and 35.4 MB in the end (delta: -8.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:15,831 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 41.9 MB. Free memory was 20.8 MB in the beginning and 20.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:15,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.88 ms. Allocated memory is still 41.9 MB. Free memory was 26.7 MB in the beginning and 16.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:15,834 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.45 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 16.0 MB in the beginning and 34.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:15,835 INFO L168 Benchmark]: Boogie Preprocessor took 84.42 ms. Allocated memory is still 50.3 MB. Free memory was 34.4 MB in the beginning and 32.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:15,835 INFO L168 Benchmark]: RCFGBuilder took 654.55 ms. Allocated memory is still 50.3 MB. Free memory was 32.8 MB in the beginning and 26.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:15,839 INFO L168 Benchmark]: TraceAbstraction took 4099.63 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.9 MB in the beginning and 38.1 MB in the end (delta: -12.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:15,840 INFO L168 Benchmark]: Witness Printer took 99.72 ms. Allocated memory is still 60.8 MB. Free memory was 38.1 MB in the beginning and 35.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:15,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 41.9 MB. Free memory was 20.8 MB in the beginning and 20.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 366.88 ms. Allocated memory is still 41.9 MB. Free memory was 26.7 MB in the beginning and 16.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.45 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 16.0 MB in the beginning and 34.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 84.42 ms. Allocated memory is still 50.3 MB. Free memory was 34.4 MB in the beginning and 32.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 654.55 ms. Allocated memory is still 50.3 MB. Free memory was 32.8 MB in the beginning and 26.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4099.63 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.9 MB in the beginning and 38.1 MB in the end (delta: -12.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * Witness Printer took 99.72 ms. Allocated memory is still 60.8 MB. Free memory was 38.1 MB in the beginning and 35.4 MB in the end (delta: 2.7 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] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L3] __assert_fail("0", "float_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 175 SDslu, 301 SDs, 0 SdLazy, 100 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7783 SizeOfPredicates, 27 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...