./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1250.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1250.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 7498db39da300a600c956afc9ee769ef7c520660 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1250.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 7498db39da300a600c956afc9ee769ef7c520660 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-10-24 23:26:59,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:26:59,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:26:59,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:26:59,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:26:59,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:26:59,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:26:59,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:26:59,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:26:59,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:26:59,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:26:59,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:26:59,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:26:59,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:26:59,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:26:59,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:26:59,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:26:59,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:26:59,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:26:59,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:26:59,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:26:59,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:26:59,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:26:59,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:26:59,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:26:59,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:26:59,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:26:59,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:26:59,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:26:59,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:26:59,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:26:59,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:26:59,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:26:59,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:26:59,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:26:59,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:26:59,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:26:59,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:26:59,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:26:59,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:26:59,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:26:59,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 23:26:59,569 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:26:59,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:26:59,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:26:59,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:26:59,573 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:26:59,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:26:59,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:26:59,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 23:26:59,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:26:59,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:26:59,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:26:59,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:26:59,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:26:59,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:26:59,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:26:59,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:26:59,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:26:59,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:26:59,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:26:59,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:26:59,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:26:59,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:26:59,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:26:59,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:26:59,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:26:59,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 23:26:59,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 23:26:59,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:26:59,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:26:59,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7498db39da300a600c956afc9ee769ef7c520660 [2020-10-24 23:27:00,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:27:00,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:27:00,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:27:00,121 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:27:00,122 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:27:00,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2020-10-24 23:27:00,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9be5de6/ef84f64f47a64f12a4b7bfc53eb7d96c/FLAGed89e718e [2020-10-24 23:27:00,928 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:27:00,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2020-10-24 23:27:00,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9be5de6/ef84f64f47a64f12a4b7bfc53eb7d96c/FLAGed89e718e [2020-10-24 23:27:01,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9be5de6/ef84f64f47a64f12a4b7bfc53eb7d96c [2020-10-24 23:27:01,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:27:01,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:27:01,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:01,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:27:01,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:27:01,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603402a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01, skipping insertion in model container [2020-10-24 23:27:01,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:27:01,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:27:01,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:01,569 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:27:01,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:01,671 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:27:01,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01 WrapperNode [2020-10-24 23:27:01,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:01,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:01,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:27:01,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:27:01,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:01,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:27:01,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:27:01,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:27:01,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... [2020-10-24 23:27:01,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:27:01,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:27:01,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:27:01,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:27:01,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 23:27:01,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:27:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 23:27:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:27:01,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:27:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 23:27:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:27:02,501 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:02,501 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-24 23:27:02,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:02 BoogieIcfgContainer [2020-10-24 23:27:02,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:02,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:02,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:02,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:02,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:27:01" (1/3) ... [2020-10-24 23:27:02,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6cf602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:02, skipping insertion in model container [2020-10-24 23:27:02,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:01" (2/3) ... [2020-10-24 23:27:02,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6cf602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:02, skipping insertion in model container [2020-10-24 23:27:02,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:02" (3/3) ... [2020-10-24 23:27:02,519 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2020-10-24 23:27:02,534 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:02,539 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:02,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:02,594 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:02,594 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:02,594 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:02,594 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:02,594 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:02,595 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:02,595 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:02,595 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-24 23:27:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:27:02,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:02,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:02,617 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-10-24 23:27:02,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:02,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136992551] [2020-10-24 23:27:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:02,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136992551] [2020-10-24 23:27:02,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:02,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 23:27:02,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551275830] [2020-10-24 23:27:02,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:02,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:02,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:02,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:02,822 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-24 23:27:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:02,843 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-10-24 23:27:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:02,845 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:27:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:02,859 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:27:02,859 INFO L226 Difference]: Without dead ends: 25 [2020-10-24 23:27:02,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-24 23:27:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-24 23:27:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:27:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-24 23:27:02,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-10-24 23:27:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:02,916 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-24 23:27:02,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-24 23:27:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:27:02,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:02,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:02,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 23:27:02,918 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:02,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-10-24 23:27:02,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:02,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743435413] [2020-10-24 23:27:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:03,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743435413] [2020-10-24 23:27:03,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:03,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:03,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456461326] [2020-10-24 23:27:03,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:03,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:03,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:03,070 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2020-10-24 23:27:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:03,162 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-24 23:27:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:03,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-24 23:27:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:03,165 INFO L225 Difference]: With dead ends: 41 [2020-10-24 23:27:03,165 INFO L226 Difference]: Without dead ends: 36 [2020-10-24 23:27:03,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-24 23:27:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-24 23:27:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:27:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:27:03,174 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-10-24 23:27:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:03,174 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:27:03,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:27:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 23:27:03,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:03,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:03,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 23:27:03,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash 502183504, now seen corresponding path program 1 times [2020-10-24 23:27:03,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:03,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086200535] [2020-10-24 23:27:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:03,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086200535] [2020-10-24 23:27:03,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:03,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:03,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864767392] [2020-10-24 23:27:03,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:03,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:03,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:03,280 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:27:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:03,371 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-24 23:27:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:03,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-24 23:27:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:03,373 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:27:03,374 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 23:27:03,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 23:27:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-24 23:27:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:27:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:27:03,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 12 [2020-10-24 23:27:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:03,384 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:27:03,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:27:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-24 23:27:03,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:03,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:03,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 23:27:03,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1951251627, now seen corresponding path program 1 times [2020-10-24 23:27:03,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:03,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128551178] [2020-10-24 23:27:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:03,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128551178] [2020-10-24 23:27:03,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:03,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419112058] [2020-10-24 23:27:03,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:03,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:03,481 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:27:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:03,547 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-24 23:27:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:03,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-24 23:27:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:03,549 INFO L225 Difference]: With dead ends: 45 [2020-10-24 23:27:03,549 INFO L226 Difference]: Without dead ends: 40 [2020-10-24 23:27:03,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-24 23:27:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2020-10-24 23:27:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:27:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:27:03,558 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 13 [2020-10-24 23:27:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:03,559 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:27:03,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:27:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:03,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:03,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:03,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 23:27:03,562 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:03,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:03,563 INFO L82 PathProgramCache]: Analyzing trace with hash -555778251, now seen corresponding path program 1 times [2020-10-24 23:27:03,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:03,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988224678] [2020-10-24 23:27:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:03,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988224678] [2020-10-24 23:27:03,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:03,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028341989] [2020-10-24 23:27:03,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:03,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:03,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:03,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:03,623 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:27:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:03,684 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-24 23:27:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:03,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:27:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:03,686 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:27:03,686 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 23:27:03,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 23:27:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-24 23:27:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:27:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:27:03,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2020-10-24 23:27:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:03,694 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:27:03,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:27:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:03,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:03,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:03,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 23:27:03,697 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:03,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-10-24 23:27:03,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:03,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675163404] [2020-10-24 23:27:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:03,730 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:03,756 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:03,790 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 23:27:03,791 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:27:03,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 23:27:03,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:03 BoogieIcfgContainer [2020-10-24 23:27:03,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:03,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:03,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:03,826 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:03,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:02" (3/4) ... [2020-10-24 23:27:03,831 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 23:27:03,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:03,834 INFO L168 Benchmark]: Toolchain (without parser) took 2575.59 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 21.8 MB in the beginning and 39.4 MB in the end (delta: -17.6 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:03,835 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 44.0 MB. Free memory was 29.4 MB in the beginning and 29.4 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:03,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.52 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 22.4 MB in the end (delta: -1.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:03,836 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.81 ms. Allocated memory is still 44.0 MB. Free memory was 22.4 MB in the beginning and 20.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:03,837 INFO L168 Benchmark]: Boogie Preprocessor took 40.52 ms. Allocated memory is still 44.0 MB. Free memory was 20.6 MB in the beginning and 29.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:03,838 INFO L168 Benchmark]: RCFGBuilder took 719.39 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 28.9 MB in the beginning and 31.2 MB in the end (delta: -2.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:03,839 INFO L168 Benchmark]: TraceAbstraction took 1317.67 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.9 MB in the beginning and 39.9 MB in the end (delta: -9.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:03,840 INFO L168 Benchmark]: Witness Printer took 5.22 ms. Allocated memory is still 67.1 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:03,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 44.0 MB. Free memory was 29.4 MB in the beginning and 29.4 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 407.52 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 22.4 MB in the end (delta: -1.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.81 ms. Allocated memory is still 44.0 MB. Free memory was 22.4 MB in the beginning and 20.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.52 ms. Allocated memory is still 44.0 MB. Free memory was 20.6 MB in the beginning and 29.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * RCFGBuilder took 719.39 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 28.9 MB in the beginning and 31.2 MB in the end (delta: -2.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1317.67 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.9 MB in the beginning and 39.9 MB in the end (delta: -9.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.22 ms. Allocated memory is still 67.1 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 56, overapproximation of someBinaryArithmeticFLOAToperation at line 62. Possible FailurePath: [L62] float x = 0.0f / 0.0f; [L63] float y = 0.0f / 0.0f; [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; [L64] float res = fmax_float(x, y); [L56] return x != x; [L66] COND TRUE !isnan_float(res) [L3] __assert_fail("0", "float_req_bl_1250.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 44 SDslu, 238 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-10-24 23:27:06,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:27:06,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:27:06,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:27:06,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:27:06,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:27:06,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:27:06,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:27:06,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:27:06,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:27:06,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:27:06,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:27:06,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:27:06,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:27:06,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:27:06,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:27:06,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:27:06,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:27:06,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:27:06,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:27:06,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:27:06,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:27:06,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:27:06,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:27:06,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:27:06,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:27:06,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:27:06,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:27:06,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:27:06,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:27:06,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:27:06,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:27:06,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:27:06,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:27:06,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:27:06,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:27:06,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:27:06,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:27:06,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:27:06,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:27:06,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:27:06,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 23:27:06,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:27:06,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:27:06,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:27:06,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:27:06,863 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:27:06,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:27:06,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:27:06,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:27:06,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:27:06,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:27:06,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:27:06,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:27:06,865 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 23:27:06,866 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 23:27:06,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:27:06,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:27:06,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:27:06,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:27:06,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:27:06,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:27:06,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:27:06,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:27:06,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:06,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:27:06,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:27:06,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:27:06,869 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 23:27:06,869 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 23:27:06,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:27:06,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:27:06,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 23:27:06,870 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7498db39da300a600c956afc9ee769ef7c520660 [2020-10-24 23:27:07,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:27:07,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:27:07,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:27:07,338 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:27:07,339 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:27:07,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2020-10-24 23:27:07,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fddc463/351ce471e2674610a2132d433f45f395/FLAG8a4a589f2 [2020-10-24 23:27:08,176 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:27:08,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2020-10-24 23:27:08,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fddc463/351ce471e2674610a2132d433f45f395/FLAG8a4a589f2 [2020-10-24 23:27:08,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fddc463/351ce471e2674610a2132d433f45f395 [2020-10-24 23:27:08,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:27:08,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:27:08,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:08,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:27:08,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:27:08,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:08,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bdc5b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08, skipping insertion in model container [2020-10-24 23:27:08,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:08,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:27:08,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:27:08,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:08,802 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:27:08,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:08,869 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:27:08,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08 WrapperNode [2020-10-24 23:27:08,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:08,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:08,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:27:08,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:27:08,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:08,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:08,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:08,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:27:08,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:27:08,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:27:08,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:08,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:08,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:08,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:09,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:09,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:09,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... [2020-10-24 23:27:09,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:27:09,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:27:09,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:27:09,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:27:09,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:09,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 23:27:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:27:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-24 23:27:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:27:09,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:27:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-24 23:27:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:27:09,624 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:09,624 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-24 23:27:09,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:09 BoogieIcfgContainer [2020-10-24 23:27:09,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:09,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:09,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:09,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:09,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:27:08" (1/3) ... [2020-10-24 23:27:09,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d012b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:09, skipping insertion in model container [2020-10-24 23:27:09,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:08" (2/3) ... [2020-10-24 23:27:09,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d012b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:09, skipping insertion in model container [2020-10-24 23:27:09,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:09" (3/3) ... [2020-10-24 23:27:09,637 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2020-10-24 23:27:09,649 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:09,654 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:09,667 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:09,697 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:09,697 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:09,697 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:09,697 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:09,698 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:09,698 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:09,698 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:09,698 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-24 23:27:09,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:27:09,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:09,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:09,721 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-10-24 23:27:09,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:09,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273879446] [2020-10-24 23:27:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 23:27:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:09,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273879446] [2020-10-24 23:27:09,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:09,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 23:27:09,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942859490] [2020-10-24 23:27:09,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:09,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:09,969 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-24 23:27:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:09,996 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-10-24 23:27:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:10,000 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:27:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:10,026 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:27:10,026 INFO L226 Difference]: Without dead ends: 25 [2020-10-24 23:27:10,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-24 23:27:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-24 23:27:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:27:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-24 23:27:10,082 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-10-24 23:27:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:10,083 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-24 23:27:10,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-24 23:27:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:27:10,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:10,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:10,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 23:27:10,302 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-10-24 23:27:10,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:10,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976947982] [2020-10-24 23:27:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:10,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:10,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976947982] [2020-10-24 23:27:10,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:10,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:10,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314058847] [2020-10-24 23:27:10,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:10,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:10,493 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 6 states. [2020-10-24 23:27:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:10,691 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2020-10-24 23:27:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:10,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-24 23:27:10,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:10,696 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:27:10,696 INFO L226 Difference]: Without dead ends: 47 [2020-10-24 23:27:10,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-24 23:27:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-24 23:27:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:27:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:27:10,716 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-10-24 23:27:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:10,716 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:27:10,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:27:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:10,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:10,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:10,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 23:27:10,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:10,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-10-24 23:27:10,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:10,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452166705] [2020-10-24 23:27:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:11,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-24 23:27:11,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452166705] [2020-10-24 23:27:11,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:11,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-24 23:27:11,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144872089] [2020-10-24 23:27:11,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 23:27:11,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:11,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 23:27:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-24 23:27:11,248 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 10 states. [2020-10-24 23:27:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:11,629 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-24 23:27:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:11,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-24 23:27:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:11,631 INFO L225 Difference]: With dead ends: 36 [2020-10-24 23:27:11,631 INFO L226 Difference]: Without dead ends: 27 [2020-10-24 23:27:11,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:27:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-24 23:27:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-24 23:27:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:27:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-10-24 23:27:11,637 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2020-10-24 23:27:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:11,638 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-10-24 23:27:11,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 23:27:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-10-24 23:27:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-24 23:27:11,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:11,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:11,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 23:27:11,852 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1012428811, now seen corresponding path program 1 times [2020-10-24 23:27:11,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:11,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713429099] [2020-10-24 23:27:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:11,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:11,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713429099] [2020-10-24 23:27:11,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:11,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:11,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195530255] [2020-10-24 23:27:11,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:11,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:11,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:11,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:11,994 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 6 states. [2020-10-24 23:27:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:12,099 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-24 23:27:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:12,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-24 23:27:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:12,101 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:27:12,101 INFO L226 Difference]: Without dead ends: 47 [2020-10-24 23:27:12,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-24 23:27:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-24 23:27:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:27:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-24 23:27:12,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 16 [2020-10-24 23:27:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:12,109 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-24 23:27:12,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-24 23:27:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:27:12,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:12,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:12,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-24 23:27:12,324 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash -356841937, now seen corresponding path program 1 times [2020-10-24 23:27:12,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:12,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016521896] [2020-10-24 23:27:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:12,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-24 23:27:12,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:12,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:12,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016521896] [2020-10-24 23:27:12,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:12,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2020-10-24 23:27:12,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594794914] [2020-10-24 23:27:12,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 23:27:12,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 23:27:12,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-24 23:27:12,698 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 12 states. [2020-10-24 23:27:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:13,110 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-24 23:27:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 23:27:13,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-24 23:27:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:13,112 INFO L225 Difference]: With dead ends: 32 [2020-10-24 23:27:13,112 INFO L226 Difference]: Without dead ends: 23 [2020-10-24 23:27:13,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-24 23:27:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-24 23:27:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-24 23:27:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-24 23:27:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-24 23:27:13,117 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-24 23:27:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:13,117 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-24 23:27:13,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 23:27:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-24 23:27:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-24 23:27:13,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:13,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:13,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-24 23:27:13,320 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -208376157, now seen corresponding path program 1 times [2020-10-24 23:27:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:13,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183515124] [2020-10-24 23:27:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-24 23:27:13,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:13,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:13,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183515124] [2020-10-24 23:27:13,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:13,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-24 23:27:13,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111225666] [2020-10-24 23:27:13,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 23:27:13,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:13,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 23:27:13,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-24 23:27:13,644 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-10-24 23:27:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:13,969 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-24 23:27:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:13,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-24 23:27:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:13,969 INFO L225 Difference]: With dead ends: 23 [2020-10-24 23:27:13,969 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 23:27:13,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:27:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 23:27:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 23:27:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 23:27:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 23:27:13,974 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-24 23:27:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:13,974 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 23:27:13,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 23:27:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 23:27:13,975 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 23:27:14,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-24 23:27:14,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 23:27:14,365 INFO L270 CegarLoopResult]: At program point L56(line 56) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)) |ULTIMATE.start_fmax_float_#res|)) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-10-24 23:27:14,365 INFO L274 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-10-24 23:27:14,365 INFO L274 CegarLoopResult]: For program point L52-2(line 52) no Hoare annotation was computed. [2020-10-24 23:27:14,366 INFO L270 CegarLoopResult]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)) |ULTIMATE.start_fmax_float_#res|)) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-10-24 23:27:14,366 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-24 23:27:14,366 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-24 23:27:14,366 INFO L274 CegarLoopResult]: For program point L32(lines 32 41) no Hoare annotation was computed. [2020-10-24 23:27:14,366 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-24 23:27:14,366 INFO L274 CegarLoopResult]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2020-10-24 23:27:14,366 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-24 23:27:14,366 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-24 23:27:14,367 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 23:27:14,367 INFO L274 CegarLoopResult]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2020-10-24 23:27:14,367 INFO L270 CegarLoopResult]: At program point L24-2(lines 24 28) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-10-24 23:27:14,367 INFO L274 CegarLoopResult]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2020-10-24 23:27:14,367 INFO L274 CegarLoopResult]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2020-10-24 23:27:14,367 INFO L270 CegarLoopResult]: At program point L24-6(lines 24 28) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-10-24 23:27:14,367 INFO L274 CegarLoopResult]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2020-10-24 23:27:14,367 INFO L274 CegarLoopResult]: For program point L49(lines 49 51) no Hoare annotation was computed. [2020-10-24 23:27:14,367 INFO L274 CegarLoopResult]: For program point L45(lines 45 47) no Hoare annotation was computed. [2020-10-24 23:27:14,368 INFO L270 CegarLoopResult]: At program point L41(lines 21 42) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y))) [2020-10-24 23:27:14,368 INFO L270 CegarLoopResult]: At program point L41-1(lines 21 42) the Hoare annotation is: (let ((.cse0 (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)))) (or (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) .cse0) (and (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) .cse0))) [2020-10-24 23:27:14,368 INFO L274 CegarLoopResult]: For program point L66(lines 66 69) no Hoare annotation was computed. [2020-10-24 23:27:14,368 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-24 23:27:14,368 INFO L277 CegarLoopResult]: At program point L71(lines 58 72) the Hoare annotation is: true [2020-10-24 23:27:14,368 INFO L274 CegarLoopResult]: For program point L38(lines 38 41) no Hoare annotation was computed. [2020-10-24 23:27:14,368 INFO L274 CegarLoopResult]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2020-10-24 23:27:14,368 INFO L274 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-10-24 23:27:14,369 INFO L274 CegarLoopResult]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2020-10-24 23:27:14,384 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:27:14,385 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:27:14,386 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:27:14,387 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:27:14,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:14 BoogieIcfgContainer [2020-10-24 23:27:14,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:14,391 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:14,391 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:14,391 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:14,392 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:09" (3/4) ... [2020-10-24 23:27:14,396 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-24 23:27:14,409 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-10-24 23:27:14,410 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-24 23:27:14,410 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-24 23:27:14,410 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-24 23:27:14,445 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == \result) && !~fp.eq~FLOAT(y, y) [2020-10-24 23:27:14,445 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == \result) && 1bv32 == \result) && !~fp.eq~FLOAT(y, y) [2020-10-24 23:27:14,446 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y)) || (!(0bv32 == \result) && !~fp.eq~FLOAT(y, y)) [2020-10-24 23:27:14,477 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 23:27:14,477 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:14,480 INFO L168 Benchmark]: Toolchain (without parser) took 5957.14 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 21.1 MB in the beginning and 29.9 MB in the end (delta: -8.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,480 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 44.0 MB. Free memory was 26.8 MB in the beginning and 26.7 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:14,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.66 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 29.7 MB in the beginning and 39.0 MB in the end (delta: -9.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,482 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.70 ms. Allocated memory is still 54.5 MB. Free memory was 39.0 MB in the beginning and 37.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:14,482 INFO L168 Benchmark]: Boogie Preprocessor took 89.32 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 35.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,483 INFO L168 Benchmark]: RCFGBuilder took 586.82 ms. Allocated memory is still 54.5 MB. Free memory was 35.6 MB in the beginning and 31.3 MB in the end (delta: 4.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,484 INFO L168 Benchmark]: TraceAbstraction took 4761.73 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 33.5 MB in the end (delta: -2.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,484 INFO L168 Benchmark]: Witness Printer took 86.24 ms. Allocated memory is still 67.1 MB. Free memory was 33.1 MB in the beginning and 29.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:14,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 44.0 MB. Free memory was 26.8 MB in the beginning and 26.7 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 327.66 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 29.7 MB in the beginning and 39.0 MB in the end (delta: -9.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.70 ms. Allocated memory is still 54.5 MB. Free memory was 39.0 MB in the beginning and 37.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 89.32 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 35.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 586.82 ms. Allocated memory is still 54.5 MB. Free memory was 35.6 MB in the beginning and 31.3 MB in the end (delta: 4.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4761.73 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 33.5 MB in the end (delta: -2.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Witness Printer took 86.24 ms. Allocated memory is still 67.1 MB. Free memory was 33.1 MB in the beginning and 29.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] * 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: 24]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 44]: Loop Invariant [2020-10-24 23:27:14,497 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:27:14,497 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: (\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == \result) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 56]: Loop Invariant [2020-10-24 23:27:14,498 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:27:14,499 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: ((\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == \result) && 1bv32 == \result) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (!~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y)) || (!(0bv32 == \result) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(x, x) && !~fp.eq~FLOAT(y, y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 117 SDslu, 549 SDs, 0 SdLazy, 138 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 74 HoareAnnotationTreeSize, 7 FomulaSimplifications, 231 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 164 ConstructedInterpolants, 36 QuantifiedInterpolants, 8446 SizeOfPredicates, 32 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...