./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1230.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1230.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 3712292932a14caaa681695c17d35c29cbe1c2a4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1230.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 3712292932a14caaa681695c17d35c29cbe1c2a4 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-10-24 23:26:50,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:26:50,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:26:50,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:26:50,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:26:50,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:26:50,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:26:50,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:26:50,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:26:50,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:26:50,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:26:50,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:26:50,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:26:50,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:26:50,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:26:50,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:26:50,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:26:50,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:26:50,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:26:50,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:26:50,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:26:50,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:26:50,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:26:50,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:26:50,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:26:50,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:26:50,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:26:50,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:26:50,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:26:50,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:26:50,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:26:50,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:26:50,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:26:50,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:26:50,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:26:50,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:26:50,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:26:50,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:26:50,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:26:50,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:26:50,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:26:50,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 23:26:50,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:26:50,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:26:50,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:26:50,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:26:50,728 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:26:50,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:26:50,728 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:26:50,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 23:26:50,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:26:50,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:26:50,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:26:50,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:26:50,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:26:50,730 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:26:50,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:26:50,731 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:26:50,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:26:50,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:26:50,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:26:50,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:26:50,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:26:50,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:26:50,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:26:50,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:26:50,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:26:50,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 23:26:50,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 23:26:50,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:26:50,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:26:50,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3712292932a14caaa681695c17d35c29cbe1c2a4 [2020-10-24 23:26:51,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:26:51,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:26:51,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:26:51,185 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:26:51,187 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:26:51,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1230.c [2020-10-24 23:26:51,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a27e731/940e0caa73854272a8012c95822937ac/FLAG93407d113 [2020-10-24 23:26:52,022 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:26:52,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1230.c [2020-10-24 23:26:52,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a27e731/940e0caa73854272a8012c95822937ac/FLAG93407d113 [2020-10-24 23:26:52,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12a27e731/940e0caa73854272a8012c95822937ac [2020-10-24 23:26:52,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:26:52,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:26:52,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:26:52,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:26:52,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:26:52,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4df93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52, skipping insertion in model container [2020-10-24 23:26:52,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:26:52,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:26:52,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:26:52,659 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:26:52,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:26:52,709 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:26:52,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52 WrapperNode [2020-10-24 23:26:52,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:26:52,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:26:52,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:26:52,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:26:52,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:26:52,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:26:52,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:26:52,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:26:52,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (1/1) ... [2020-10-24 23:26:52,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:26:52,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:26:52,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:26:52,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:26:52,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (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 [2020-10-24 23:26:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 23:26:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:26:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 23:26:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:26:52,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:26:52,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 23:26:52,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:26:53,367 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:26:53,367 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-24 23:26:53,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:26:53 BoogieIcfgContainer [2020-10-24 23:26:53,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:26:53,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:26:53,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:26:53,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:26:53,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:26:52" (1/3) ... [2020-10-24 23:26:53,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2473514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:26:53, skipping insertion in model container [2020-10-24 23:26:53,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:52" (2/3) ... [2020-10-24 23:26:53,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2473514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:26:53, skipping insertion in model container [2020-10-24 23:26:53,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:26:53" (3/3) ... [2020-10-24 23:26:53,381 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1230.c [2020-10-24 23:26:53,396 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:26:53,401 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:26:53,416 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:26:53,468 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:26:53,468 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:26:53,468 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:26:53,468 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:26:53,469 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:26:53,469 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:26:53,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:26:53,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:26:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-24 23:26:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:26:53,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:53,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:53,498 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:53,507 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-10-24 23:26:53,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:53,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849512170] [2020-10-24 23:26:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:53,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849512170] [2020-10-24 23:26:53,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:53,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 23:26:53,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656312635] [2020-10-24 23:26:53,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:26:53,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:53,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:26:53,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:26:53,766 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-24 23:26:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:53,792 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-10-24 23:26:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:26:53,794 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:26:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:53,819 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:26:53,819 INFO L226 Difference]: Without dead ends: 25 [2020-10-24 23:26:53,824 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 [2020-10-24 23:26:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-24 23:26:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-24 23:26:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:26:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-24 23:26:53,871 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-10-24 23:26:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:53,871 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-24 23:26:53,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:26:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-24 23:26:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:26:53,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:53,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:53,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 23:26:53,873 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:53,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:53,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-10-24 23:26:53,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:53,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944884248] [2020-10-24 23:26:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:53,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944884248] [2020-10-24 23:26:53,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:53,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:26:53,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078667769] [2020-10-24 23:26:53,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:26:53,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:53,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:26:53,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:26:53,982 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2020-10-24 23:26:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:54,062 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-24 23:26:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:26:54,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-24 23:26:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:54,064 INFO L225 Difference]: With dead ends: 41 [2020-10-24 23:26:54,065 INFO L226 Difference]: Without dead ends: 36 [2020-10-24 23:26:54,066 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 [2020-10-24 23:26:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-24 23:26:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-24 23:26:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:26:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:26:54,074 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-10-24 23:26:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:54,075 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:26:54,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:26:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:26:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 23:26:54,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:54,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:54,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 23:26:54,077 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash 502183504, now seen corresponding path program 1 times [2020-10-24 23:26:54,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:54,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538578567] [2020-10-24 23:26:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:54,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538578567] [2020-10-24 23:26:54,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:54,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:26:54,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575585146] [2020-10-24 23:26:54,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:26:54,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:26:54,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:26:54,155 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:26:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:54,220 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-24 23:26:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:26:54,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-24 23:26:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:54,221 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:26:54,222 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 23:26:54,222 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 [2020-10-24 23:26:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 23:26:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-24 23:26:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:26:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:26:54,228 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 12 [2020-10-24 23:26:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:54,229 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:26:54,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:26:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:26:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-24 23:26:54,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:54,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:54,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 23:26:54,230 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1951251627, now seen corresponding path program 1 times [2020-10-24 23:26:54,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:54,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332086702] [2020-10-24 23:26:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:54,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332086702] [2020-10-24 23:26:54,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:54,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:26:54,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86606127] [2020-10-24 23:26:54,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:26:54,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:54,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:26:54,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:26:54,331 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:26:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:54,388 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-24 23:26:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:26:54,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-24 23:26:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:54,390 INFO L225 Difference]: With dead ends: 45 [2020-10-24 23:26:54,390 INFO L226 Difference]: Without dead ends: 40 [2020-10-24 23:26:54,391 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 [2020-10-24 23:26:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-24 23:26:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2020-10-24 23:26:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:26:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:26:54,397 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 13 [2020-10-24 23:26:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:54,397 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:26:54,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:26:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:26:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:26:54,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:54,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:54,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 23:26:54,399 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash -555778251, now seen corresponding path program 1 times [2020-10-24 23:26:54,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:54,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111202575] [2020-10-24 23:26:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:26:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:26:54,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111202575] [2020-10-24 23:26:54,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:26:54,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:26:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414434741] [2020-10-24 23:26:54,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:26:54,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:26:54,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:26:54,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:26:54,452 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:26:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:26:54,516 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-24 23:26:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:26:54,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:26:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:26:54,517 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:26:54,518 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 23:26:54,518 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 [2020-10-24 23:26:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 23:26:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-24 23:26:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:26:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:26:54,531 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2020-10-24 23:26:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:26:54,531 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:26:54,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:26:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:26:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:26:54,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:26:54,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:26:54,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 23:26:54,535 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:26:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:26:54,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-10-24 23:26:54,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:26:54,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655428392] [2020-10-24 23:26:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:26:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:26:54,599 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:26:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:26:54,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:26:54,683 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 23:26:54,683 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:26:54,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 23:26:54,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:26:54 BoogieIcfgContainer [2020-10-24 23:26:54,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:26:54,717 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:26:54,718 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:26:54,718 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:26:54,719 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:26:53" (3/4) ... [2020-10-24 23:26:54,723 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 23:26:54,723 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:26:54,726 INFO L168 Benchmark]: Toolchain (without parser) took 2362.88 ms. Allocated memory was 39.8 MB in the beginning and 58.7 MB in the end (delta: 18.9 MB). Free memory was 17.0 MB in the beginning and 34.6 MB in the end (delta: -17.6 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:54,727 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 39.8 MB. Free memory was 26.6 MB in the beginning and 26.6 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:26:54,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.30 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 16.4 MB in the beginning and 23.9 MB in the end (delta: -7.6 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:54,729 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.36 ms. Allocated memory is still 48.2 MB. Free memory was 23.9 MB in the beginning and 22.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:54,730 INFO L168 Benchmark]: Boogie Preprocessor took 38.02 ms. Allocated memory is still 48.2 MB. Free memory was 22.2 MB in the beginning and 32.7 MB in the end (delta: -10.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:54,731 INFO L168 Benchmark]: RCFGBuilder took 570.52 ms. Allocated memory is still 48.2 MB. Free memory was 32.7 MB in the beginning and 26.5 MB in the end (delta: 6.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:54,732 INFO L168 Benchmark]: TraceAbstraction took 1345.17 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 26.0 MB in the beginning and 35.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2020-10-24 23:26:54,733 INFO L168 Benchmark]: Witness Printer took 5.65 ms. Allocated memory is still 58.7 MB. Free memory was 35.0 MB in the beginning and 34.6 MB in the end (delta: 399.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:26:54,738 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 39.8 MB. Free memory was 26.6 MB in the beginning and 26.6 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 341.30 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 16.4 MB in the beginning and 23.9 MB in the end (delta: -7.6 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.36 ms. Allocated memory is still 48.2 MB. Free memory was 23.9 MB in the beginning and 22.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.02 ms. Allocated memory is still 48.2 MB. Free memory was 22.2 MB in the beginning and 32.7 MB in the end (delta: -10.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * RCFGBuilder took 570.52 ms. Allocated memory is still 48.2 MB. Free memory was 32.7 MB in the beginning and 26.5 MB in the end (delta: 6.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1345.17 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 26.0 MB in the beginning and 35.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.65 ms. Allocated memory is still 58.7 MB. Free memory was 35.0 MB in the beginning and 34.6 MB in the end (delta: 399.2 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 46, overapproximation of someBinaryArithmeticFLOAToperation at line 56. Possible FailurePath: [L56] float x = 0.0f / 0.0f; [L57] float y = 0.0f / 0.0f; [L14] __uint32_t w; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L22] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L24-L25] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L27-L28] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L30] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L33] return 0; [L37] COND TRUE __fpclassify_float(x) == 0 [L38] return y; [L58] float res = fmin_float(x, y); [L46] return x != x; [L60] COND TRUE !isnan_float(res) [L3] __assert_fail("0", "float_req_bl_1230.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 44 SDslu, 238 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 44 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-a4ecdab [2020-10-24 23:26:57,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:26:57,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:26:57,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:26:57,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:26:57,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:26:57,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:26:57,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:26:57,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:26:57,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:26:57,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:26:57,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:26:57,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:26:57,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:26:57,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:26:57,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:26:57,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:26:57,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:26:57,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:26:57,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:26:57,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:26:57,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:26:57,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:26:57,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:26:57,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:26:57,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:26:57,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:26:57,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:26:57,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:26:57,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:26:57,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:26:57,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:26:57,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:26:57,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:26:57,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:26:57,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:26:57,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:26:57,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:26:57,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:26:57,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:26:57,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:26:57,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 23:26:57,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:26:57,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:26:57,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:26:57,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:26:57,521 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:26:57,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:26:57,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:26:57,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:26:57,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:26:57,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:26:57,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:26:57,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:26:57,524 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 23:26:57,524 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 23:26:57,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:26:57,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:26:57,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:26:57,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:26:57,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:26:57,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:26:57,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:26:57,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:26:57,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:26:57,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:26:57,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:26:57,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:26:57,529 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 23:26:57,529 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 23:26:57,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:26:57,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:26:57,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 23:26:57,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3712292932a14caaa681695c17d35c29cbe1c2a4 [2020-10-24 23:26:57,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:26:57,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:26:57,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:26:57,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:26:57,987 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:26:57,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1230.c [2020-10-24 23:26:58,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668ec160a/4de54ec3312e42a688791691e8f60c2c/FLAG00e49f375 [2020-10-24 23:26:58,707 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:26:58,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1230.c [2020-10-24 23:26:58,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668ec160a/4de54ec3312e42a688791691e8f60c2c/FLAG00e49f375 [2020-10-24 23:26:59,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668ec160a/4de54ec3312e42a688791691e8f60c2c [2020-10-24 23:26:59,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:26:59,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:26:59,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:26:59,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:26:59,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:26:59,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ede1b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59, skipping insertion in model container [2020-10-24 23:26:59,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:26:59,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:26:59,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:26:59,415 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:26:59,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:26:59,464 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:26:59,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59 WrapperNode [2020-10-24 23:26:59,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:26:59,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:26:59,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:26:59,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:26:59,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:26:59,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:26:59,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:26:59,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:26:59,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:26:59,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:26:59,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:26:59,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:26:59,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (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 [2020-10-24 23:26:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 23:26:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:26:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-24 23:26:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:26:59,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:26:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-24 23:26:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:27:00,199 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:00,199 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-24 23:27:00,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:00 BoogieIcfgContainer [2020-10-24 23:27:00,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:00,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:00,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:00,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:00,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:26:59" (1/3) ... [2020-10-24 23:27:00,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b9a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:00, skipping insertion in model container [2020-10-24 23:27:00,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (2/3) ... [2020-10-24 23:27:00,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b9a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:00, skipping insertion in model container [2020-10-24 23:27:00,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:00" (3/3) ... [2020-10-24 23:27:00,212 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1230.c [2020-10-24 23:27:00,225 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:00,230 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:00,245 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:00,273 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:00,274 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:00,274 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:00,274 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:00,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:00,275 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:00,275 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:00,275 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-24 23:27:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:27:00,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:00,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:00,298 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-10-24 23:27:00,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:00,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880844675] [2020-10-24 23:27:00,321 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 [2020-10-24 23:27:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:00,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 23:27:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:00,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:00,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880844675] [2020-10-24 23:27:00,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:00,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 23:27:00,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86614353] [2020-10-24 23:27:00,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:00,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:00,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:00,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:00,477 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-24 23:27:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:00,498 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-10-24 23:27:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:00,499 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:27:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:00,509 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:27:00,509 INFO L226 Difference]: Without dead ends: 25 [2020-10-24 23:27:00,513 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 [2020-10-24 23:27:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-24 23:27:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-24 23:27:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:27:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-24 23:27:00,553 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-10-24 23:27:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:00,553 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-24 23:27:00,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-24 23:27:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:27:00,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:00,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:00,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 23:27:00,773 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:00,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-10-24 23:27:00,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:00,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808311368] [2020-10-24 23:27:00,776 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 [2020-10-24 23:27:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:00,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:00,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:00,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:01,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808311368] [2020-10-24 23:27:01,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:01,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:01,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024739017] [2020-10-24 23:27:01,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:01,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:01,055 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 6 states. [2020-10-24 23:27:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:01,174 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2020-10-24 23:27:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:01,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-24 23:27:01,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:01,176 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:27:01,176 INFO L226 Difference]: Without dead ends: 47 [2020-10-24 23:27:01,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-24 23:27:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-24 23:27:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:27:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:27:01,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-10-24 23:27:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:01,186 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:27:01,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:27:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:01,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:01,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:01,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 23:27:01,405 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:01,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-10-24 23:27:01,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:01,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108256697] [2020-10-24 23:27:01,408 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 [2020-10-24 23:27:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:01,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-24 23:27:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:01,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:01,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108256697] [2020-10-24 23:27:01,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:01,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-24 23:27:01,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379973753] [2020-10-24 23:27:01,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 23:27:01,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:01,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 23:27:01,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-24 23:27:01,683 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 10 states. [2020-10-24 23:27:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:01,991 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-24 23:27:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:01,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-24 23:27:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:01,994 INFO L225 Difference]: With dead ends: 36 [2020-10-24 23:27:01,994 INFO L226 Difference]: Without dead ends: 27 [2020-10-24 23:27:01,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:27:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-24 23:27:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-24 23:27:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:27:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-10-24 23:27:02,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2020-10-24 23:27:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:02,002 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-10-24 23:27:02,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 23:27:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-10-24 23:27:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-24 23:27:02,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:02,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:02,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 23:27:02,214 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1012428811, now seen corresponding path program 1 times [2020-10-24 23:27:02,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:02,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682289837] [2020-10-24 23:27:02,217 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 [2020-10-24 23:27:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:02,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:02,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:02,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:02,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682289837] [2020-10-24 23:27:02,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:02,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:02,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002979868] [2020-10-24 23:27:02,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:02,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:02,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:02,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:02,398 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 6 states. [2020-10-24 23:27:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:02,508 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-24 23:27:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:02,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-24 23:27:02,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:02,516 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:27:02,516 INFO L226 Difference]: Without dead ends: 47 [2020-10-24 23:27:02,517 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 [2020-10-24 23:27:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-24 23:27:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-24 23:27:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:27:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-24 23:27:02,524 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 16 [2020-10-24 23:27:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:02,525 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-24 23:27:02,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-24 23:27:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:27:02,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:02,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:02,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-24 23:27:02,741 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash -356841937, now seen corresponding path program 1 times [2020-10-24 23:27:02,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:02,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549677107] [2020-10-24 23:27:02,743 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 [2020-10-24 23:27:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:02,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-24 23:27:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:02,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:03,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549677107] [2020-10-24 23:27:03,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:03,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2020-10-24 23:27:03,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507890469] [2020-10-24 23:27:03,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 23:27:03,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:03,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 23:27:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-24 23:27:03,129 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 12 states. [2020-10-24 23:27:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:03,502 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-24 23:27:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 23:27:03,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-24 23:27:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:03,504 INFO L225 Difference]: With dead ends: 32 [2020-10-24 23:27:03,504 INFO L226 Difference]: Without dead ends: 23 [2020-10-24 23:27:03,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-24 23:27:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-24 23:27:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-24 23:27:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-24 23:27:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-24 23:27:03,519 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-24 23:27:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:03,521 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-24 23:27:03,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 23:27:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-24 23:27:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-24 23:27:03,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:03,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:03,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-24 23:27:03,737 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:03,738 INFO L82 PathProgramCache]: Analyzing trace with hash -208376157, now seen corresponding path program 1 times [2020-10-24 23:27:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:03,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041602876] [2020-10-24 23:27:03,739 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 [2020-10-24 23:27:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-24 23:27:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:03,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:04,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041602876] [2020-10-24 23:27:04,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:04,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-24 23:27:04,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524810099] [2020-10-24 23:27:04,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 23:27:04,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 23:27:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-24 23:27:04,028 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-10-24 23:27:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:04,266 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-24 23:27:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:04,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-24 23:27:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:04,267 INFO L225 Difference]: With dead ends: 23 [2020-10-24 23:27:04,267 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 23:27:04,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:27:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 23:27:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 23:27:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 23:27:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 23:27:04,268 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-24 23:27:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:04,268 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 23:27:04,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 23:27:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 23:27:04,269 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 23:27:04,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-24 23:27:04,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 23:27:04,644 INFO L274 CegarLoopResult]: For program point L60(lines 60 63) no Hoare annotation was computed. [2020-10-24 23:27:04,644 INFO L274 CegarLoopResult]: For program point L27(lines 27 33) no Hoare annotation was computed. [2020-10-24 23:27:04,644 INFO L274 CegarLoopResult]: For program point L27-1(lines 27 33) no Hoare annotation was computed. [2020-10-24 23:27:04,644 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-24 23:27:04,644 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-24 23:27:04,645 INFO L277 CegarLoopResult]: At program point L65(lines 48 66) the Hoare annotation is: true [2020-10-24 23:27:04,645 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-24 23:27:04,645 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-24 23:27:04,645 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-24 23:27:04,645 INFO L274 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-10-24 23:27:04,645 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 23:27:04,645 INFO L274 CegarLoopResult]: For program point L24-1(lines 24 33) no Hoare annotation was computed. [2020-10-24 23:27:04,645 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 20) no Hoare annotation was computed. [2020-10-24 23:27:04,645 INFO L270 CegarLoopResult]: At program point L16-2(lines 16 20) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y)) (not (fp.eq ULTIMATE.start_fmin_float_~x ULTIMATE.start_fmin_float_~x))) [2020-10-24 23:27:04,646 INFO L274 CegarLoopResult]: For program point L16-3(lines 13 34) no Hoare annotation was computed. [2020-10-24 23:27:04,646 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 20) no Hoare annotation was computed. [2020-10-24 23:27:04,646 INFO L270 CegarLoopResult]: At program point L16-6(lines 16 20) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y)) (not (fp.eq ULTIMATE.start_fmin_float_~x ULTIMATE.start_fmin_float_~x))) [2020-10-24 23:27:04,646 INFO L274 CegarLoopResult]: For program point L16-7(lines 13 34) no Hoare annotation was computed. [2020-10-24 23:27:04,646 INFO L274 CegarLoopResult]: For program point L37(lines 37 38) no Hoare annotation was computed. [2020-10-24 23:27:04,646 INFO L270 CegarLoopResult]: At program point L33(lines 13 34) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y)) (not (fp.eq ULTIMATE.start_fmin_float_~x ULTIMATE.start_fmin_float_~x))) [2020-10-24 23:27:04,646 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-24 23:27:04,647 INFO L270 CegarLoopResult]: At program point L33-1(lines 13 34) the Hoare annotation is: (let ((.cse0 (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y)))) (or (and .cse0 (not (fp.eq ULTIMATE.start_fmin_float_~x ULTIMATE.start_fmin_float_~x))) (and (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) .cse0))) [2020-10-24 23:27:04,647 INFO L270 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq |ULTIMATE.start_fmin_float_#res| |ULTIMATE.start_fmin_float_#res|)) (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y))) [2020-10-24 23:27:04,647 INFO L274 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-10-24 23:27:04,648 INFO L274 CegarLoopResult]: For program point L42-2(line 42) no Hoare annotation was computed. [2020-10-24 23:27:04,648 INFO L270 CegarLoopResult]: At program point L42-3(lines 36 43) the Hoare annotation is: (and (not (fp.eq |ULTIMATE.start_fmin_float_#res| |ULTIMATE.start_fmin_float_#res|)) (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y))) [2020-10-24 23:27:04,648 INFO L274 CegarLoopResult]: For program point L30(lines 30 33) no Hoare annotation was computed. [2020-10-24 23:27:04,648 INFO L274 CegarLoopResult]: For program point L30-1(lines 30 33) no Hoare annotation was computed. [2020-10-24 23:27:04,649 INFO L274 CegarLoopResult]: For program point L39(lines 39 40) no Hoare annotation was computed. [2020-10-24 23:27:04,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:04 BoogieIcfgContainer [2020-10-24 23:27:04,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:04,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:04,669 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:04,669 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:04,670 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:00" (3/4) ... [2020-10-24 23:27:04,673 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-24 23:27:04,686 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-10-24 23:27:04,687 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-24 23:27:04,687 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-24 23:27:04,687 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-24 23:27:04,717 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !~fp.eq~FLOAT(\result, \result) && !~fp.eq~FLOAT(y, y) [2020-10-24 23:27:04,718 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (1bv32 == \result && !~fp.eq~FLOAT(\result, \result)) && !~fp.eq~FLOAT(y, y) [2020-10-24 23:27:04,718 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x)) || (!(0bv32 == \result) && !~fp.eq~FLOAT(y, y)) [2020-10-24 23:27:04,750 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 23:27:04,750 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:04,753 INFO L168 Benchmark]: Toolchain (without parser) took 5656.27 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 25.7 MB in the beginning and 37.5 MB in the end (delta: -11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:04,754 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 48.2 MB. Free memory is still 33.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:04,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.36 ms. Allocated memory is still 48.2 MB. Free memory was 25.1 MB in the beginning and 25.8 MB in the end (delta: -699.5 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:04,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.40 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 24.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:04,756 INFO L168 Benchmark]: Boogie Preprocessor took 39.60 ms. Allocated memory is still 48.2 MB. Free memory was 24.0 MB in the beginning and 22.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:04,757 INFO L168 Benchmark]: RCFGBuilder took 644.72 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.4 MB in the beginning and 38.1 MB in the end (delta: -15.7 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:04,758 INFO L168 Benchmark]: TraceAbstraction took 4464.52 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.8 MB in the beginning and 41.1 MB in the end (delta: -3.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:04,759 INFO L168 Benchmark]: Witness Printer took 82.17 ms. Allocated memory is still 71.3 MB. Free memory was 41.1 MB in the beginning and 37.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:04,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 48.2 MB. Free memory is still 33.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 357.36 ms. Allocated memory is still 48.2 MB. Free memory was 25.1 MB in the beginning and 25.8 MB in the end (delta: -699.5 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.40 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 24.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.60 ms. Allocated memory is still 48.2 MB. Free memory was 24.0 MB in the beginning and 22.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 644.72 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.4 MB in the beginning and 38.1 MB in the end (delta: -15.7 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4464.52 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.8 MB in the beginning and 41.1 MB in the end (delta: -3.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * Witness Printer took 82.17 ms. Allocated memory is still 71.3 MB. Free memory was 41.1 MB in the beginning and 37.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (!~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x)) || (!(0bv32 == \result) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(\result, \result) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (1bv32 == \result && !~fp.eq~FLOAT(\result, \result)) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 117 SDslu, 549 SDs, 0 SdLazy, 138 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 68 HoareAnnotationTreeSize, 7 FomulaSimplifications, 213 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 164 ConstructedInterpolants, 36 QuantifiedInterpolants, 8466 SizeOfPredicates, 32 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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 correct! Received shutdown request...