./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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_1232a.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 588c8ae05db5b455b7a642d0c86b0e222c46f03c .............................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_1.3.100.v20150511-1540.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_1232a.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 588c8ae05db5b455b7a642d0c86b0e222c46f03c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:18,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:18,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:18,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:18,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:18,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:18,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:18,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:18,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:18,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:18,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:18,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:18,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:18,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:18,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:18,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:18,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:18,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:18,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:18,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:18,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:18,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:18,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:18,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:18,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:18,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:18,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:18,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:18,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:18,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:18,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:18,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:18,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:18,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:18,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:18,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:18,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:18,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:18,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:18,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:18,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:18,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:40:18,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:18,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:18,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:18,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:18,605 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:18,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:18,606 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:18,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:40:18,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:18,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:18,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:18,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:18,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:18,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:18,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:18,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:18,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:18,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:18,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:18,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:18,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:18,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:18,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:18,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:18,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:18,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:40:18,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:40:18,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:18,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:18,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 588c8ae05db5b455b7a642d0c86b0e222c46f03c [2020-10-20 00:40:18,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:18,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:18,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:18,858 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:18,859 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:18,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2020-10-20 00:40:18,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de45d162f/3ee989a802174ec68044a83070520a64/FLAG6f8612d34 [2020-10-20 00:40:19,411 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:19,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2020-10-20 00:40:19,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de45d162f/3ee989a802174ec68044a83070520a64/FLAG6f8612d34 [2020-10-20 00:40:19,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de45d162f/3ee989a802174ec68044a83070520a64 [2020-10-20 00:40:19,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:19,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:19,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:19,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:19,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:19,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:19" (1/1) ... [2020-10-20 00:40:19,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277eedf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:19, skipping insertion in model container [2020-10-20 00:40:19,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:19" (1/1) ... [2020-10-20 00:40:19,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:19,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:20,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:20,116 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:20,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:20,159 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:20,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20 WrapperNode [2020-10-20 00:40:20,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:20,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:20,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:20,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:20,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:20,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:20,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:20,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:20,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (1/1) ... [2020-10-20 00:40:20,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:20,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:20,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:20,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:20,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (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 [2020-10-20 00:40:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:40:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:40:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:20,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:40:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:20,688 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:20,695 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:40:20,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:20 BoogieIcfgContainer [2020-10-20 00:40:20,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:20,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:20,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:20,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:20,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:19" (1/3) ... [2020-10-20 00:40:20,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d17f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:20, skipping insertion in model container [2020-10-20 00:40:20,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:20" (2/3) ... [2020-10-20 00:40:20,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d17f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:20, skipping insertion in model container [2020-10-20 00:40:20,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:20" (3/3) ... [2020-10-20 00:40:20,706 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2020-10-20 00:40:20,718 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:20,725 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:20,741 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:20,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:20,764 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:20,764 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:20,764 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:20,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:20,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:20,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:20,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:40:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:20,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:20,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:20,788 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:40:20,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:20,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396430655] [2020-10-20 00:40:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:20,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396430655] [2020-10-20 00:40:20,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:20,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:40:20,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781935893] [2020-10-20 00:40:20,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:20,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:20,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:20,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:20,952 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:40:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:20,972 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:40:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:20,982 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:20,993 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:40:20,993 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:40:20,997 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 [2020-10-20 00:40:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:40:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:40:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:40:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:40:21,030 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:40:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:21,031 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:40:21,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:40:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:21,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:21,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:21,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:40:21,033 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:21,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:21,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:40:21,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:21,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785690310] [2020-10-20 00:40:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:21,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785690310] [2020-10-20 00:40:21,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:21,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:21,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592308205] [2020-10-20 00:40:21,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:21,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:21,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:21,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:21,137 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-20 00:40:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:21,208 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-20 00:40:21,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:21,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:40:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:21,211 INFO L225 Difference]: With dead ends: 53 [2020-10-20 00:40:21,211 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 00:40:21,212 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 [2020-10-20 00:40:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 00:40:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-20 00:40:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:21,226 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:40:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:21,226 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:21,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:40:21,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:21,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:21,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:40:21,228 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:21,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:21,228 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-20 00:40:21,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:21,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775631088] [2020-10-20 00:40:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:21,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775631088] [2020-10-20 00:40:21,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:21,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398438044] [2020-10-20 00:40:21,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:21,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:21,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:21,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:21,350 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:21,415 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:40:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:21,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 00:40:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:21,417 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:40:21,417 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:40:21,418 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 [2020-10-20 00:40:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:40:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:40:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:21,425 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-20 00:40:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:21,425 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:21,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:40:21,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:21,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:21,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:40:21,428 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-20 00:40:21,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:21,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628616992] [2020-10-20 00:40:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:21,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628616992] [2020-10-20 00:40:21,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:21,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:21,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738607668] [2020-10-20 00:40:21,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:21,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:21,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:21,521 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:21,605 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-20 00:40:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:21,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 00:40:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:21,607 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:40:21,607 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 00:40:21,608 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 [2020-10-20 00:40:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 00:40:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-20 00:40:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:21,615 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-20 00:40:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:21,615 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:21,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:21,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:21,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:21,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:40:21,617 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-20 00:40:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:21,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418129621] [2020-10-20 00:40:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:21,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418129621] [2020-10-20 00:40:21,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:21,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:21,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858466790] [2020-10-20 00:40:21,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:21,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:21,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:21,664 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:21,722 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:40:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:21,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:40:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:21,724 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:40:21,724 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:40:21,725 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 [2020-10-20 00:40:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:40:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:40:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:21,731 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-20 00:40:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:21,732 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:21,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:21,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:21,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:21,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:40:21,734 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:40:21,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:21,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707316224] [2020-10-20 00:40:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:21,759 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:21,780 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:21,838 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:40:21,839 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:21,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:40:21,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:21 BoogieIcfgContainer [2020-10-20 00:40:21,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:21,879 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:21,880 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:21,880 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:21,880 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:20" (3/4) ... [2020-10-20 00:40:21,884 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:40:21,885 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:21,887 INFO L168 Benchmark]: Toolchain (without parser) took 2108.88 ms. Allocated memory was 35.1 MB in the beginning and 49.3 MB in the end (delta: 14.2 MB). Free memory was 13.2 MB in the beginning and 28.1 MB in the end (delta: -14.9 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:40:21,888 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 34.1 MB. Free memory was 19.6 MB in the beginning and 19.6 MB in the end (delta: 30.6 kB). Peak memory consumption was 30.6 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.42 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 12.2 MB in the beginning and 23.3 MB in the end (delta: -11.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,890 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.76 ms. Allocated memory is still 43.5 MB. Free memory was 23.3 MB in the beginning and 21.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,891 INFO L168 Benchmark]: Boogie Preprocessor took 33.33 ms. Allocated memory is still 43.5 MB. Free memory was 21.2 MB in the beginning and 19.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,891 INFO L168 Benchmark]: RCFGBuilder took 452.97 ms. Allocated memory was 43.5 MB in the beginning and 45.6 MB in the end (delta: 2.1 MB). Free memory was 19.5 MB in the beginning and 27.0 MB in the end (delta: -7.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,892 INFO L168 Benchmark]: TraceAbstraction took 1180.45 ms. Allocated memory was 45.6 MB in the beginning and 49.3 MB in the end (delta: 3.7 MB). Free memory was 26.5 MB in the beginning and 28.4 MB in the end (delta: -1.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,893 INFO L168 Benchmark]: Witness Printer took 5.18 ms. Allocated memory is still 49.3 MB. Free memory was 28.4 MB in the beginning and 28.1 MB in the end (delta: 372.4 kB). Peak memory consumption was 372.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,898 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 34.1 MB. Free memory was 19.6 MB in the beginning and 19.6 MB in the end (delta: 30.6 kB). Peak memory consumption was 30.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 372.42 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 12.2 MB in the beginning and 23.3 MB in the end (delta: -11.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 49.76 ms. Allocated memory is still 43.5 MB. Free memory was 23.3 MB in the beginning and 21.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 33.33 ms. Allocated memory is still 43.5 MB. Free memory was 21.2 MB in the beginning and 19.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 452.97 ms. Allocated memory was 43.5 MB in the beginning and 45.6 MB in the end (delta: 2.1 MB). Free memory was 19.5 MB in the beginning and 27.0 MB in the end (delta: -7.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1180.45 ms. Allocated memory was 45.6 MB in the beginning and 49.3 MB in the end (delta: 3.7 MB). Free memory was 26.5 MB in the beginning and 28.4 MB in the end (delta: -1.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 14.3 GB. * Witness Printer took 5.18 ms. Allocated memory is still 49.3 MB. Free memory was 28.4 MB in the beginning and 28.1 MB in the end (delta: 372.4 kB). Peak memory consumption was 372.4 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 67. Possible FailurePath: [L66] float x = 0.0f; [L67] float y = -0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L3] __assert_fail("0", "float_req_bl_1232a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:24,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:24,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:24,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:24,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:24,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:24,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:24,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:24,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:24,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:24,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:24,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:24,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:24,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:24,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:24,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:24,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:24,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:24,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:24,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:24,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:24,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:24,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:24,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:24,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:24,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:24,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:24,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:24,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:24,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:24,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:24,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:24,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:24,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:24,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:24,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:24,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:24,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:24,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:24,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:24,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:24,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:40:24,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:24,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:24,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:24,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:24,186 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:24,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:24,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:24,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:24,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:24,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:24,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:24,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:24,189 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:40:24,190 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:40:24,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:24,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:24,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:24,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:24,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:24,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:24,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:24,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:24,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:24,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:24,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:24,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:24,192 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:40:24,192 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:40:24,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:24,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:24,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:40:24,193 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> 588c8ae05db5b455b7a642d0c86b0e222c46f03c [2020-10-20 00:40:24,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:24,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:24,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:24,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:24,423 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:24,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2020-10-20 00:40:24,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30dd4625b/a9cd3b8ad96347c58f97cd7fa7a42b0a/FLAG0759a1dee [2020-10-20 00:40:24,970 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:24,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2020-10-20 00:40:24,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30dd4625b/a9cd3b8ad96347c58f97cd7fa7a42b0a/FLAG0759a1dee [2020-10-20 00:40:25,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30dd4625b/a9cd3b8ad96347c58f97cd7fa7a42b0a [2020-10-20 00:40:25,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:25,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:25,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:25,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:25,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:25,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f038bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25, skipping insertion in model container [2020-10-20 00:40:25,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:25,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:25,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:25,675 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:25,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:25,723 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:25,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25 WrapperNode [2020-10-20 00:40:25,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:25,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:25,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:25,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:25,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:25,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:25,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:25,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:25,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (1/1) ... [2020-10-20 00:40:25,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:25,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:25,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:25,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:25,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (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 [2020-10-20 00:40:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:40:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:40:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:25,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-20 00:40:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:26,321 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:26,322 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:40:26,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:26 BoogieIcfgContainer [2020-10-20 00:40:26,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:26,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:26,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:26,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:26,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:25" (1/3) ... [2020-10-20 00:40:26,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f7d5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:26, skipping insertion in model container [2020-10-20 00:40:26,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:25" (2/3) ... [2020-10-20 00:40:26,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f7d5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:26, skipping insertion in model container [2020-10-20 00:40:26,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:26" (3/3) ... [2020-10-20 00:40:26,332 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2020-10-20 00:40:26,342 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:26,350 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:26,362 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:26,391 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:26,392 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:26,393 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:26,393 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:26,395 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:26,395 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:26,395 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:26,395 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:40:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:26,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:26,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:26,425 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:40:26,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:26,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323526944] [2020-10-20 00:40:26,443 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 [2020-10-20 00:40:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:40:26,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:26,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:26,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323526944] [2020-10-20 00:40:26,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:26,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:40:26,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626832498] [2020-10-20 00:40:26,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:26,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:26,586 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:40:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:26,608 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:40:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:26,610 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:26,619 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:40:26,620 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:40:26,623 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 [2020-10-20 00:40:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:40:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:40:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:40:26,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:40:26,657 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:40:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:26,657 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:40:26,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:40:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:26,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:26,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:26,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:40:26,861 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:40:26,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:26,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479777195] [2020-10-20 00:40:26,867 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 [2020-10-20 00:40:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:40:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:27,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:27,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479777195] [2020-10-20 00:40:27,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:27,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:40:27,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091092818] [2020-10-20 00:40:27,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:40:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:27,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:40:27,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:40:27,051 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-20 00:40:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:27,191 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-20 00:40:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:27,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 00:40:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:27,195 INFO L225 Difference]: With dead ends: 68 [2020-10-20 00:40:27,195 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 00:40:27,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:40:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 00:40:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-20 00:40:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:27,204 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:40:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:27,204 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:27,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:40:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:27,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:27,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:27,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:40:27,419 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:40:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:27,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029097484] [2020-10-20 00:40:27,422 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 [2020-10-20 00:40:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:40:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:27,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:27,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029097484] [2020-10-20 00:40:27,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:27,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-20 00:40:27,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625472178] [2020-10-20 00:40:27,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:27,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:27,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:27,577 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:27,635 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-20 00:40:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:27,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:40:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:27,637 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:40:27,637 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:40:27,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:40:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 00:40:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:40:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-20 00:40:27,644 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-20 00:40:27,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:27,644 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-20 00:40:27,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-20 00:40:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:40:27,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:27,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:27,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:40:27,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-20 00:40:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:27,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921118664] [2020-10-20 00:40:27,863 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 [2020-10-20 00:40:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:40:27,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:27,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:27,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921118664] [2020-10-20 00:40:27,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:27,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:40:27,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710002557] [2020-10-20 00:40:27,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:40:27,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:40:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:40:27,977 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-20 00:40:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:28,043 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-20 00:40:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:28,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 00:40:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:28,045 INFO L225 Difference]: With dead ends: 61 [2020-10-20 00:40:28,045 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 00:40:28,046 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 [2020-10-20 00:40:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 00:40:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-20 00:40:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:40:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-20 00:40:28,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-10-20 00:40:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:28,052 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-20 00:40:28,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:40:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-20 00:40:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:28,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:28,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:28,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 00:40:28,277 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-20 00:40:28,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:28,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973504755] [2020-10-20 00:40:28,279 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 [2020-10-20 00:40:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:40:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:28,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:28,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973504755] [2020-10-20 00:40:28,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:28,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:40:28,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492597950] [2020-10-20 00:40:28,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:28,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:28,422 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-20 00:40:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:28,440 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-20 00:40:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:40:28,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 00:40:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:28,442 INFO L225 Difference]: With dead ends: 38 [2020-10-20 00:40:28,442 INFO L226 Difference]: Without dead ends: 28 [2020-10-20 00:40:28,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-20 00:40:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-20 00:40:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:40:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-20 00:40:28,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-20 00:40:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:28,448 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-20 00:40:28,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-20 00:40:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:28,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:28,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:28,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-20 00:40:28,661 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-20 00:40:28,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:28,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653581036] [2020-10-20 00:40:28,662 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 [2020-10-20 00:40:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:28,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:40:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:28,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:28,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653581036] [2020-10-20 00:40:28,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:28,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-20 00:40:28,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063201064] [2020-10-20 00:40:28,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:40:28,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:28,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:40:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:40:28,829 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-20 00:40:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:28,928 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-20 00:40:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:40:28,929 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-20 00:40:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:28,930 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:40:28,930 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 00:40:28,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:40:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 00:40:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-20 00:40:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:40:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-20 00:40:28,935 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-20 00:40:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:28,936 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-20 00:40:28,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:40:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-20 00:40:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:40:28,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:28,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:29,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-20 00:40:29,148 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-20 00:40:29,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:29,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078730971] [2020-10-20 00:40:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:29,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:40:29,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:29,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:29,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078730971] [2020-10-20 00:40:29,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:29,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-20 00:40:29,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810143895] [2020-10-20 00:40:29,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:40:29,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:40:29,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:29,311 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-20 00:40:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:29,365 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-20 00:40:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:40:29,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-20 00:40:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:29,368 INFO L225 Difference]: With dead ends: 43 [2020-10-20 00:40:29,368 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 00:40:29,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:40:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 00:40:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 00:40:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 00:40:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-20 00:40:29,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-10-20 00:40:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:29,374 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-20 00:40:29,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:40:29,375 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-20 00:40:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 00:40:29,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:29,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:29,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-20 00:40:29,584 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-20 00:40:29,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:29,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050578568] [2020-10-20 00:40:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:29,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 00:40:29,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:29,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:40:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:29,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:30,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050578568] [2020-10-20 00:40:30,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:30,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-10-20 00:40:30,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993390222] [2020-10-20 00:40:30,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:40:30,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:30,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:40:30,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:40:30,058 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 16 states. [2020-10-20 00:40:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:30,308 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-10-20 00:40:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:40:30,309 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-10-20 00:40:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:30,309 INFO L225 Difference]: With dead ends: 23 [2020-10-20 00:40:30,309 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:40:30,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-10-20 00:40:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:40:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:40:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:40:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:40:30,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-20 00:40:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:30,312 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:40:30,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:40:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:40:30,313 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:40:30,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-20 00:40:30,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:40:30,766 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:40:30,766 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-20 00:40:30,766 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:40:30,766 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:40:30,766 INFO L274 CegarLoopResult]: For program point L28(lines 28 34) no Hoare annotation was computed. [2020-10-20 00:40:30,766 INFO L274 CegarLoopResult]: For program point L28-1(lines 28 34) no Hoare annotation was computed. [2020-10-20 00:40:30,766 INFO L274 CegarLoopResult]: For program point L71(line 71) no Hoare annotation was computed. [2020-10-20 00:40:30,767 INFO L274 CegarLoopResult]: For program point L38(lines 38 39) no Hoare annotation was computed. [2020-10-20 00:40:30,767 INFO L274 CegarLoopResult]: For program point L71-2(lines 71 74) no Hoare annotation was computed. [2020-10-20 00:40:30,767 INFO L270 CegarLoopResult]: At program point L55(lines 46 56) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and |ULTIMATE.start_main_#t~short16| (= (bvadd |ULTIMATE.start___signbit_float_#res| (_ bv4294967295 32)) (_ bv0 32)) (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= |ULTIMATE.start_fmin_float_#res| .cse0) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= .cse0 ULTIMATE.start___signbit_float_~x) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= .cse0 ULTIMATE.start_main_~res~0) (= ULTIMATE.start_fmin_float_~y .cse0) (= .cse0 (fp ((_ extract 31 31) ULTIMATE.start___signbit_float_~w~1) ((_ extract 30 23) ULTIMATE.start___signbit_float_~w~1) ((_ extract 22 0) ULTIMATE.start___signbit_float_~w~1))))) [2020-10-20 00:40:30,767 INFO L274 CegarLoopResult]: For program point L31(lines 31 34) no Hoare annotation was computed. [2020-10-20 00:40:30,767 INFO L274 CegarLoopResult]: For program point L31-1(lines 31 34) no Hoare annotation was computed. [2020-10-20 00:40:30,767 INFO L274 CegarLoopResult]: For program point L40(lines 40 41) no Hoare annotation was computed. [2020-10-20 00:40:30,768 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:40:30,768 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:40:30,768 INFO L274 CegarLoopResult]: For program point L49-1(lines 49 53) no Hoare annotation was computed. [2020-10-20 00:40:30,768 INFO L270 CegarLoopResult]: At program point L49-2(lines 49 53) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and |ULTIMATE.start_main_#t~short16| (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= |ULTIMATE.start_fmin_float_#res| .cse0) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= .cse0 ULTIMATE.start___signbit_float_~x) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= .cse0 ULTIMATE.start_main_~res~0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2020-10-20 00:40:30,768 INFO L274 CegarLoopResult]: For program point L49-3(lines 49 53) no Hoare annotation was computed. [2020-10-20 00:40:30,768 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:40:30,768 INFO L274 CegarLoopResult]: For program point L25(lines 25 34) no Hoare annotation was computed. [2020-10-20 00:40:30,769 INFO L274 CegarLoopResult]: For program point L25-1(lines 25 34) no Hoare annotation was computed. [2020-10-20 00:40:30,769 INFO L274 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-10-20 00:40:30,769 INFO L270 CegarLoopResult]: At program point L17-2(lines 17 21) the Hoare annotation is: (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmin_float_~y (fp.neg (_ +zero 8 24))) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x)) [2020-10-20 00:40:30,769 INFO L274 CegarLoopResult]: For program point L17-3(lines 14 35) no Hoare annotation was computed. [2020-10-20 00:40:30,770 INFO L274 CegarLoopResult]: For program point L17-5(lines 17 21) no Hoare annotation was computed. [2020-10-20 00:40:30,770 INFO L270 CegarLoopResult]: At program point L17-6(lines 17 21) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2020-10-20 00:40:30,770 INFO L274 CegarLoopResult]: For program point L17-7(lines 14 35) no Hoare annotation was computed. [2020-10-20 00:40:30,770 INFO L270 CegarLoopResult]: At program point L34(lines 14 35) the Hoare annotation is: (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= ULTIMATE.start_fmin_float_~y (fp.neg (_ +zero 8 24))) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x)) [2020-10-20 00:40:30,771 INFO L270 CegarLoopResult]: At program point L34-1(lines 14 35) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2020-10-20 00:40:30,771 INFO L277 CegarLoopResult]: At program point L76(lines 58 77) the Hoare annotation is: true [2020-10-20 00:40:30,771 INFO L274 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-10-20 00:40:30,771 INFO L274 CegarLoopResult]: For program point L43-2(line 43) no Hoare annotation was computed. [2020-10-20 00:40:30,771 INFO L270 CegarLoopResult]: At program point L43-3(lines 37 44) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= |ULTIMATE.start_fmin_float_#res| .cse0) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2020-10-20 00:40:30,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:30 BoogieIcfgContainer [2020-10-20 00:40:30,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:30,794 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:30,794 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:30,794 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:30,795 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:26" (3/4) ... [2020-10-20 00:40:30,798 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:40:30,811 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-10-20 00:40:30,811 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-20 00:40:30,812 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 00:40:30,812 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:40:30,838 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && 2bv32 == \result) && ~Pluszero~LONGDOUBLE() == x [2020-10-20 00:40:30,839 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2020-10-20 00:40:30,839 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((aux-res == -0.0f && __signbit_float(res) == 1-aux && x == ~Pluszero~LONGDOUBLE()) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == res) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2020-10-20 00:40:30,840 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((x == ~Pluszero~LONGDOUBLE() && !(0bv32 == \result)) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2020-10-20 00:40:30,840 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((aux-res == -0.0f && __signbit_float(res) == 1-aux && ~bvadd64(\result, 4294967295bv32) == 0bv32) && x == ~Pluszero~LONGDOUBLE()) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == res) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) [2020-10-20 00:40:30,879 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:40:30,879 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:30,881 INFO L168 Benchmark]: Toolchain (without parser) took 5524.93 ms. Allocated memory was 36.2 MB in the beginning and 57.7 MB in the end (delta: 21.5 MB). Free memory was 9.9 MB in the beginning and 23.7 MB in the end (delta: -13.8 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:30,882 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 35.7 MB. Free memory is still 14.3 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:40:30,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.36 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 9.1 MB in the beginning and 26.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 7.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:30,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.95 ms. Allocated memory is still 45.1 MB. Free memory was 26.5 MB in the beginning and 24.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:30,884 INFO L168 Benchmark]: Boogie Preprocessor took 36.63 ms. Allocated memory is still 45.1 MB. Free memory was 24.5 MB in the beginning and 22.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:30,885 INFO L168 Benchmark]: RCFGBuilder took 512.39 ms. Allocated memory was 45.1 MB in the beginning and 47.7 MB in the end (delta: 2.6 MB). Free memory was 22.5 MB in the beginning and 15.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:30,885 INFO L168 Benchmark]: TraceAbstraction took 4468.37 ms. Allocated memory was 47.7 MB in the beginning and 57.7 MB in the end (delta: 10.0 MB). Free memory was 15.2 MB in the beginning and 28.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:30,886 INFO L168 Benchmark]: Witness Printer took 85.38 ms. Allocated memory is still 57.7 MB. Free memory was 28.1 MB in the beginning and 23.7 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:30,890 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 35.7 MB. Free memory is still 14.3 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 362.36 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 9.1 MB in the beginning and 26.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 7.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 49.95 ms. Allocated memory is still 45.1 MB. Free memory was 26.5 MB in the beginning and 24.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 36.63 ms. Allocated memory is still 45.1 MB. Free memory was 24.5 MB in the beginning and 22.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 512.39 ms. Allocated memory was 45.1 MB in the beginning and 47.7 MB in the end (delta: 2.6 MB). Free memory was 22.5 MB in the beginning and 15.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4468.37 ms. Allocated memory was 47.7 MB in the beginning and 57.7 MB in the end (delta: 10.0 MB). Free memory was 15.2 MB in the beginning and 28.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. * Witness Printer took 85.38 ms. Allocated memory is still 57.7 MB. Free memory was 28.1 MB in the beginning and 23.7 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 14.3 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: 17]: Loop Invariant Derived loop invariant: (x == ~Pluszero~LONGDOUBLE() && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~Pluszero~LONGDOUBLE() == x - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((aux-res == -0.0f && __signbit_float(res) == 1-aux && x == ~Pluszero~LONGDOUBLE()) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == res) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (x == ~Pluszero~LONGDOUBLE() && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && !(0bv32 == \result)) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((((((aux-res == -0.0f && __signbit_float(res) == 1-aux && ~bvadd64(\result, 4294967295bv32) == 0bv32) && x == ~Pluszero~LONGDOUBLE()) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == res) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && 2bv32 == \result) && ~Pluszero~LONGDOUBLE() == x - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((x == ~Pluszero~LONGDOUBLE() && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 204 SDslu, 399 SDs, 0 SdLazy, 150 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 16 NumberOfFragments, 184 HoareAnnotationTreeSize, 8 FomulaSimplifications, 48 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 16152 SizeOfPredicates, 38 NumberOfNonLiveVariables, 519 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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...