./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.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 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.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 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 16:20:47,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 16:20:47,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 16:20:47,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 16:20:47,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 16:20:47,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 16:20:47,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 16:20:47,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 16:20:47,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 16:20:47,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 16:20:47,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 16:20:47,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 16:20:47,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 16:20:47,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 16:20:47,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 16:20:47,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 16:20:47,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 16:20:47,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 16:20:47,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 16:20:47,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 16:20:47,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 16:20:47,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 16:20:47,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 16:20:47,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 16:20:47,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 16:20:47,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 16:20:47,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 16:20:47,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 16:20:47,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 16:20:47,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 16:20:47,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 16:20:47,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 16:20:47,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 16:20:47,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 16:20:47,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 16:20:47,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 16:20:47,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 16:20:47,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 16:20:47,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 16:20:47,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 16:20:47,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 16:20:47,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 16:20:47,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 16:20:47,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 16:20:47,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 16:20:47,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 16:20:47,580 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 16:20:47,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 16:20:47,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 16:20:47,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 16:20:47,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 16:20:47,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 16:20:47,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 16:20:47,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 16:20:47,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 16:20:47,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 16:20:47,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 16:20:47,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 16:20:47,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 16:20:47,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 16:20:47,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 16:20:47,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 16:20:47,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 16:20:47,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:20:47,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 16:20:47,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 16:20:47,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 16:20:47,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 16:20:47,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 16:20:47,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 16:20:47,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 16:20:47,588 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2020-12-02 16:20:48,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 16:20:48,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 16:20:48,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 16:20:48,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 16:20:48,208 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 16:20:48,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-12-02 16:20:48,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efe860632/4a25b830f05240e89477151edc1064cd/FLAG2db6dadd9 [2020-12-02 16:20:48,998 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 16:20:48,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-12-02 16:20:49,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efe860632/4a25b830f05240e89477151edc1064cd/FLAG2db6dadd9 [2020-12-02 16:20:49,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efe860632/4a25b830f05240e89477151edc1064cd [2020-12-02 16:20:49,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 16:20:49,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 16:20:49,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 16:20:49,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 16:20:49,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 16:20:49,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221a2d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49, skipping insertion in model container [2020-12-02 16:20:49,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,412 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 16:20:49,457 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 16:20:49,631 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c[1936,1949] [2020-12-02 16:20:49,635 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:20:49,645 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 16:20:49,674 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c[1936,1949] [2020-12-02 16:20:49,676 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:20:49,695 INFO L217 MainTranslator]: Completed translation [2020-12-02 16:20:49,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49 WrapperNode [2020-12-02 16:20:49,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 16:20:49,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 16:20:49,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 16:20:49,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 16:20:49,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 16:20:49,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 16:20:49,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 16:20:49,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 16:20:49,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (1/1) ... [2020-12-02 16:20:49,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 16:20:49,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 16:20:49,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 16:20:49,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 16:20:49,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (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 [2020-12-02 16:20:49,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 16:20:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 16:20:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-02 16:20:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 16:20:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 16:20:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-02 16:20:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 16:20:50,351 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 16:20:50,352 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-02 16:20:50,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:50 BoogieIcfgContainer [2020-12-02 16:20:50,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 16:20:50,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 16:20:50,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 16:20:50,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 16:20:50,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:20:49" (1/3) ... [2020-12-02 16:20:50,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f805e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:20:50, skipping insertion in model container [2020-12-02 16:20:50,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:49" (2/3) ... [2020-12-02 16:20:50,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f805e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:20:50, skipping insertion in model container [2020-12-02 16:20:50,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:50" (3/3) ... [2020-12-02 16:20:50,380 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-12-02 16:20:50,400 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 16:20:50,404 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 16:20:50,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 16:20:50,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 16:20:50,455 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 16:20:50,455 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 16:20:50,456 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 16:20:50,456 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 16:20:50,456 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 16:20:50,456 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 16:20:50,456 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 16:20:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-02 16:20:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 16:20:50,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:50,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:50,485 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:50,496 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-02 16:20:50,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:20:50,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292704701] [2020-12-02 16:20:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:20:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:50,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292704701] [2020-12-02 16:20:50,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:50,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 16:20:50,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954649634] [2020-12-02 16:20:50,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 16:20:50,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:20:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 16:20:50,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:20:50,783 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-02 16:20:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:50,820 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-02 16:20:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 16:20:50,838 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-02 16:20:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:50,870 INFO L225 Difference]: With dead ends: 62 [2020-12-02 16:20:50,870 INFO L226 Difference]: Without dead ends: 29 [2020-12-02 16:20:50,877 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 [2020-12-02 16:20:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-02 16:20:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-02 16:20:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-02 16:20:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-02 16:20:50,939 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-02 16:20:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:50,940 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-02 16:20:50,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 16:20:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-02 16:20:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 16:20:50,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:50,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:50,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 16:20:50,943 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:50,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-02 16:20:50,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:20:50,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702581694] [2020-12-02 16:20:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:20:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:51,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702581694] [2020-12-02 16:20:51,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:51,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 16:20:51,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587999571] [2020-12-02 16:20:51,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 16:20:51,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:20:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 16:20:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 16:20:51,162 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-02 16:20:51,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:51,241 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-02 16:20:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 16:20:51,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-02 16:20:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:51,243 INFO L225 Difference]: With dead ends: 53 [2020-12-02 16:20:51,243 INFO L226 Difference]: Without dead ends: 44 [2020-12-02 16:20:51,244 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 [2020-12-02 16:20:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-02 16:20:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-02 16:20:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 16:20:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 16:20:51,258 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-02 16:20:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:51,260 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 16:20:51,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 16:20:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 16:20:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 16:20:51,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:51,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:51,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 16:20:51,265 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:51,267 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-02 16:20:51,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:20:51,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552109423] [2020-12-02 16:20:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:20:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:51,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552109423] [2020-12-02 16:20:51,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:51,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 16:20:51,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922361718] [2020-12-02 16:20:51,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 16:20:51,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:20:51,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 16:20:51,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 16:20:51,390 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-02 16:20:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:51,456 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-02 16:20:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 16:20:51,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-02 16:20:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:51,458 INFO L225 Difference]: With dead ends: 55 [2020-12-02 16:20:51,458 INFO L226 Difference]: Without dead ends: 46 [2020-12-02 16:20:51,459 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 [2020-12-02 16:20:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-02 16:20:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-12-02 16:20:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 16:20:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 16:20:51,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-12-02 16:20:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:51,466 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 16:20:51,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 16:20:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 16:20:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 16:20:51,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:51,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:51,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-02 16:20:51,469 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:51,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:51,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-12-02 16:20:51,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:20:51,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587352962] [2020-12-02 16:20:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:20:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:51,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587352962] [2020-12-02 16:20:51,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:51,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 16:20:51,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211917563] [2020-12-02 16:20:51,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 16:20:51,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:20:51,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 16:20:51,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 16:20:51,523 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-02 16:20:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:51,580 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-12-02 16:20:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 16:20:51,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-02 16:20:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:51,583 INFO L225 Difference]: With dead ends: 57 [2020-12-02 16:20:51,583 INFO L226 Difference]: Without dead ends: 48 [2020-12-02 16:20:51,584 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 [2020-12-02 16:20:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-02 16:20:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-12-02 16:20:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 16:20:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 16:20:51,591 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-12-02 16:20:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:51,591 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 16:20:51,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 16:20:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 16:20:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 16:20:51,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:51,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:51,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-02 16:20:51,594 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:51,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:51,595 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-12-02 16:20:51,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:20:51,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664819993] [2020-12-02 16:20:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:20:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:51,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664819993] [2020-12-02 16:20:51,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:51,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 16:20:51,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453350771] [2020-12-02 16:20:51,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 16:20:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:20:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 16:20:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 16:20:51,699 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-02 16:20:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:51,776 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-02 16:20:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 16:20:51,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-02 16:20:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:51,778 INFO L225 Difference]: With dead ends: 55 [2020-12-02 16:20:51,779 INFO L226 Difference]: Without dead ends: 46 [2020-12-02 16:20:51,779 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 [2020-12-02 16:20:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-02 16:20:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-12-02 16:20:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 16:20:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 16:20:51,792 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-12-02 16:20:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:51,792 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 16:20:51,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 16:20:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 16:20:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 16:20:51,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:51,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:51,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-02 16:20:51,794 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:51,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-12-02 16:20:51,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:20:51,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794153654] [2020-12-02 16:20:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:20:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:20:51,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:20:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:20:51,872 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:20:51,923 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 16:20:51,924 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 16:20:51,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-02 16:20:51,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:20:51 BoogieIcfgContainer [2020-12-02 16:20:51,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 16:20:51,981 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 16:20:51,981 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 16:20:51,981 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 16:20:51,982 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:50" (3/4) ... [2020-12-02 16:20:51,986 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 16:20:51,986 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 16:20:51,989 INFO L168 Benchmark]: Toolchain (without parser) took 2622.32 ms. Allocated memory was 41.9 MB in the beginning and 67.1 MB in the end (delta: 25.2 MB). Free memory was 20.1 MB in the beginning and 32.0 MB in the end (delta: -11.9 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2020-12-02 16:20:51,990 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 41.9 MB. Free memory was 26.9 MB in the beginning and 26.9 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:20:51,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.04 ms. Allocated memory is still 41.9 MB. Free memory was 19.9 MB in the beginning and 18.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-12-02 16:20:51,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.42 ms. Allocated memory is still 41.9 MB. Free memory was 18.5 MB in the beginning and 16.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:20:51,993 INFO L168 Benchmark]: Boogie Preprocessor took 41.28 ms. Allocated memory was 41.9 MB in the beginning and 54.5 MB in the end (delta: 12.6 MB). Free memory was 16.8 MB in the beginning and 39.6 MB in the end (delta: -22.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-12-02 16:20:51,994 INFO L168 Benchmark]: RCFGBuilder took 559.93 ms. Allocated memory is still 54.5 MB. Free memory was 39.6 MB in the beginning and 33.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-12-02 16:20:51,995 INFO L168 Benchmark]: TraceAbstraction took 1619.28 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 32.4 MB in the end (delta: 492.2 kB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-12-02 16:20:51,996 INFO L168 Benchmark]: Witness Printer took 6.00 ms. Allocated memory is still 67.1 MB. Free memory was 32.4 MB in the beginning and 32.0 MB in the end (delta: 432.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:20:52,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 41.9 MB. Free memory was 26.9 MB in the beginning and 26.9 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.04 ms. Allocated memory is still 41.9 MB. Free memory was 19.9 MB in the beginning and 18.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.42 ms. Allocated memory is still 41.9 MB. Free memory was 18.5 MB in the beginning and 16.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.28 ms. Allocated memory was 41.9 MB in the beginning and 54.5 MB in the end (delta: 12.6 MB). Free memory was 16.8 MB in the beginning and 39.6 MB in the end (delta: -22.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * RCFGBuilder took 559.93 ms. Allocated memory is still 54.5 MB. Free memory was 39.6 MB in the beginning and 33.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1619.28 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 32.4 MB in the end (delta: 492.2 kB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Witness Printer took 6.00 ms. Allocated memory is still 67.1 MB. Free memory was 32.4 MB in the beginning and 32.0 MB in the end (delta: 432.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someUnaryFLOAT_SMToperation at line 76, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 80. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s 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 0.2.0-2880296 [2020-12-02 16:20:54,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 16:20:54,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 16:20:54,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 16:20:54,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 16:20:54,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 16:20:54,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 16:20:54,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 16:20:54,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 16:20:54,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 16:20:54,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 16:20:54,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 16:20:54,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 16:20:54,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 16:20:54,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 16:20:54,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 16:20:54,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 16:20:54,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 16:20:54,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 16:20:54,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 16:20:54,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 16:20:54,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 16:20:54,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 16:20:54,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 16:20:54,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 16:20:54,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 16:20:54,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 16:20:54,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 16:20:54,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 16:20:54,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 16:20:54,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 16:20:54,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 16:20:54,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 16:20:54,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 16:20:54,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 16:20:54,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 16:20:54,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 16:20:54,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 16:20:54,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 16:20:54,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 16:20:54,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 16:20:54,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 16:20:55,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 16:20:55,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 16:20:55,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 16:20:55,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 16:20:55,018 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 16:20:55,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 16:20:55,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 16:20:55,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 16:20:55,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 16:20:55,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 16:20:55,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 16:20:55,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 16:20:55,021 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 16:20:55,021 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 16:20:55,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 16:20:55,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 16:20:55,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 16:20:55,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 16:20:55,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 16:20:55,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 16:20:55,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 16:20:55,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 16:20:55,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:20:55,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 16:20:55,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 16:20:55,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 16:20:55,025 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 16:20:55,025 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 16:20:55,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 16:20:55,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 16:20:55,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 16:20:55,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2020-12-02 16:20:55,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 16:20:55,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 16:20:55,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 16:20:55,458 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 16:20:55,458 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 16:20:55,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-12-02 16:20:55,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34622e40/871b524e6d16476285d9460f3531f6d3/FLAG989427869 [2020-12-02 16:20:56,262 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 16:20:56,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-12-02 16:20:56,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34622e40/871b524e6d16476285d9460f3531f6d3/FLAG989427869 [2020-12-02 16:20:56,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34622e40/871b524e6d16476285d9460f3531f6d3 [2020-12-02 16:20:56,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 16:20:56,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 16:20:56,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 16:20:56,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 16:20:56,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 16:20:56,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:56,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c090c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56, skipping insertion in model container [2020-12-02 16:20:56,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:56,621 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 16:20:56,642 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 16:20:56,879 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c[1936,1949] [2020-12-02 16:20:56,883 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:20:56,902 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 16:20:56,931 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c[1936,1949] [2020-12-02 16:20:56,932 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:20:56,956 INFO L217 MainTranslator]: Completed translation [2020-12-02 16:20:56,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56 WrapperNode [2020-12-02 16:20:56,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 16:20:56,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 16:20:56,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 16:20:56,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 16:20:56,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:56,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:57,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 16:20:57,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 16:20:57,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 16:20:57,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 16:20:57,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:57,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:57,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:57,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:57,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:57,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:57,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (1/1) ... [2020-12-02 16:20:57,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 16:20:57,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 16:20:57,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 16:20:57,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 16:20:57,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (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 [2020-12-02 16:20:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 16:20:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 16:20:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-02 16:20:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 16:20:57,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 16:20:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-12-02 16:20:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-12-02 16:20:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 16:20:57,682 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 16:20:57,682 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-02 16:20:57,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:57 BoogieIcfgContainer [2020-12-02 16:20:57,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 16:20:57,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 16:20:57,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 16:20:57,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 16:20:57,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:20:56" (1/3) ... [2020-12-02 16:20:57,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d06ce81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:20:57, skipping insertion in model container [2020-12-02 16:20:57,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:20:56" (2/3) ... [2020-12-02 16:20:57,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d06ce81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:20:57, skipping insertion in model container [2020-12-02 16:20:57,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:57" (3/3) ... [2020-12-02 16:20:57,716 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-12-02 16:20:57,747 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 16:20:57,753 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 16:20:57,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 16:20:57,839 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 16:20:57,839 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 16:20:57,839 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 16:20:57,840 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 16:20:57,840 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 16:20:57,840 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 16:20:57,841 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 16:20:57,841 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 16:20:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-02 16:20:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 16:20:57,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:57,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:57,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-02 16:20:57,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:20:57,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058032774] [2020-12-02 16:20:57,910 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 [2020-12-02 16:20:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:58,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 16:20:58,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:20:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:58,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:20:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:58,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058032774] [2020-12-02 16:20:58,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:58,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 16:20:58,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521031782] [2020-12-02 16:20:58,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 16:20:58,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:20:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 16:20:58,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:20:58,158 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-02 16:20:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:58,186 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-02 16:20:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 16:20:58,188 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-02 16:20:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:58,201 INFO L225 Difference]: With dead ends: 62 [2020-12-02 16:20:58,201 INFO L226 Difference]: Without dead ends: 29 [2020-12-02 16:20:58,205 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 [2020-12-02 16:20:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-02 16:20:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-02 16:20:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-02 16:20:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-02 16:20:58,259 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-02 16:20:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:58,259 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-02 16:20:58,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 16:20:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-02 16:20:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 16:20:58,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:58,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:58,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 16:20:58,475 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-02 16:20:58,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:20:58,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273485253] [2020-12-02 16:20:58,478 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 [2020-12-02 16:20:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:58,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-02 16:20:58,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:20:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:58,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:20:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:58,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273485253] [2020-12-02 16:20:58,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:58,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-12-02 16:20:58,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656716018] [2020-12-02 16:20:58,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 16:20:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:20:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 16:20:58,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-02 16:20:58,701 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-12-02 16:20:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:58,804 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-12-02 16:20:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 16:20:58,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-02 16:20:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:58,807 INFO L225 Difference]: With dead ends: 68 [2020-12-02 16:20:58,807 INFO L226 Difference]: Without dead ends: 59 [2020-12-02 16:20:58,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-02 16:20:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-02 16:20:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-12-02 16:20:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 16:20:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 16:20:58,819 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-02 16:20:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:58,822 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 16:20:58,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 16:20:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 16:20:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 16:20:58,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:58,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:59,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 16:20:59,047 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:59,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:59,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-12-02 16:20:59,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:20:59,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764343776] [2020-12-02 16:20:59,050 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 [2020-12-02 16:20:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-02 16:20:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:20:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:59,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:20:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:59,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764343776] [2020-12-02 16:20:59,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:59,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-12-02 16:20:59,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434908257] [2020-12-02 16:20:59,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 16:20:59,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:20:59,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 16:20:59,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 16:20:59,230 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-02 16:20:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:59,284 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-12-02 16:20:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 16:20:59,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-02 16:20:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:59,286 INFO L225 Difference]: With dead ends: 52 [2020-12-02 16:20:59,286 INFO L226 Difference]: Without dead ends: 26 [2020-12-02 16:20:59,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 16:20:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-02 16:20:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-02 16:20:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-02 16:20:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-02 16:20:59,293 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-12-02 16:20:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:59,293 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-02 16:20:59,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 16:20:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-02 16:20:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-02 16:20:59,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:59,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:59,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-02 16:20:59,508 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-12-02 16:20:59,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:20:59,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533010541] [2020-12-02 16:20:59,511 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 [2020-12-02 16:20:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:20:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-02 16:20:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:20:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:59,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:20:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:20:59,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533010541] [2020-12-02 16:20:59,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:20:59,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-12-02 16:20:59,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962089430] [2020-12-02 16:20:59,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 16:20:59,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:20:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 16:20:59,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-02 16:20:59,647 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-12-02 16:20:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:20:59,704 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-12-02 16:20:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 16:20:59,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-02 16:20:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:20:59,706 INFO L225 Difference]: With dead ends: 61 [2020-12-02 16:20:59,706 INFO L226 Difference]: Without dead ends: 52 [2020-12-02 16:20:59,707 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 [2020-12-02 16:20:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-02 16:20:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-12-02 16:20:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-02 16:20:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-02 16:20:59,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-12-02 16:20:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:20:59,714 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-02 16:20:59,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 16:20:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-02 16:20:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 16:20:59,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:20:59,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:20:59,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-02 16:20:59,934 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:20:59,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:20:59,935 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-12-02 16:20:59,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:20:59,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224735916] [2020-12-02 16:20:59,936 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 [2020-12-02 16:21:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:21:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-02 16:21:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:21:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:21:00,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:21:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:21:00,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224735916] [2020-12-02 16:21:00,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:21:00,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-02 16:21:00,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129294844] [2020-12-02 16:21:00,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 16:21:00,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:21:00,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 16:21:00,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 16:21:00,181 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-12-02 16:21:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:21:00,196 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-12-02 16:21:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-02 16:21:00,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-02 16:21:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:21:00,197 INFO L225 Difference]: With dead ends: 38 [2020-12-02 16:21:00,197 INFO L226 Difference]: Without dead ends: 28 [2020-12-02 16:21:00,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 16:21:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-02 16:21:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-02 16:21:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-02 16:21:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-02 16:21:00,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-12-02 16:21:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:21:00,206 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-02 16:21:00,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 16:21:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-02 16:21:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 16:21:00,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:21:00,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:21:00,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-02 16:21:00,422 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:21:00,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:21:00,423 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-12-02 16:21:00,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:21:00,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58172301] [2020-12-02 16:21:00,425 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 [2020-12-02 16:21:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:21:00,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-02 16:21:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:21:00,679 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 16:21:00,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 16:21:00,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-02 16:21:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:21:00,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:21:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:21:00,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58172301] [2020-12-02 16:21:00,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:21:00,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-12-02 16:21:00,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402658248] [2020-12-02 16:21:00,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 16:21:00,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:21:00,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 16:21:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-02 16:21:00,884 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-02 16:21:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:21:01,170 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-02 16:21:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 16:21:01,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-02 16:21:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:21:01,171 INFO L225 Difference]: With dead ends: 40 [2020-12-02 16:21:01,171 INFO L226 Difference]: Without dead ends: 37 [2020-12-02 16:21:01,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-02 16:21:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-02 16:21:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-12-02 16:21:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-02 16:21:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-02 16:21:01,178 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-12-02 16:21:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:21:01,179 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-02 16:21:01,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 16:21:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-02 16:21:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-02 16:21:01,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:21:01,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:21:01,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-02 16:21:01,392 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:21:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:21:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-12-02 16:21:01,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:21:01,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165122060] [2020-12-02 16:21:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-02 16:21:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:21:01,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-02 16:21:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:21:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:21:01,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:21:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:21:01,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165122060] [2020-12-02 16:21:01,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:21:01,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2020-12-02 16:21:01,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650708955] [2020-12-02 16:21:01,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-02 16:21:01,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:21:01,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-02 16:21:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-02 16:21:01,856 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2020-12-02 16:21:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:21:02,016 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-02 16:21:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 16:21:02,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-02 16:21:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:21:02,025 INFO L225 Difference]: With dead ends: 43 [2020-12-02 16:21:02,025 INFO L226 Difference]: Without dead ends: 23 [2020-12-02 16:21:02,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-02 16:21:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-02 16:21:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-02 16:21:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-02 16:21:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-12-02 16:21:02,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-12-02 16:21:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:21:02,032 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-12-02 16:21:02,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-02 16:21:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-12-02 16:21:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-02 16:21:02,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:21:02,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:21:02,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-02 16:21:02,257 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:21:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:21:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-12-02 16:21:02,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:21:02,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734222661] [2020-12-02 16:21:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-02 16:21:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:21:02,386 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:21:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:21:02,513 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:21:02,577 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-02 16:21:02,578 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 16:21:02,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-02 16:21:02,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:21:02 BoogieIcfgContainer [2020-12-02 16:21:02,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 16:21:02,841 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 16:21:02,841 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 16:21:02,841 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 16:21:02,842 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:20:57" (3/4) ... [2020-12-02 16:21:02,844 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-02 16:21:02,914 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 16:21:02,915 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 16:21:02,918 INFO L168 Benchmark]: Toolchain (without parser) took 6317.44 ms. Allocated memory was 46.1 MB in the beginning and 69.2 MB in the end (delta: 23.1 MB). Free memory was 23.8 MB in the beginning and 31.6 MB in the end (delta: -7.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2020-12-02 16:21:02,919 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 37.7 MB. Free memory was 20.1 MB in the beginning and 20.1 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:21:02,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.48 ms. Allocated memory is still 46.1 MB. Free memory was 23.6 MB in the beginning and 23.7 MB in the end (delta: -94.2 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-02 16:21:02,925 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.53 ms. Allocated memory is still 46.1 MB. Free memory was 23.7 MB in the beginning and 21.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:21:02,929 INFO L168 Benchmark]: Boogie Preprocessor took 43.59 ms. Allocated memory is still 46.1 MB. Free memory was 21.8 MB in the beginning and 20.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:21:02,930 INFO L168 Benchmark]: RCFGBuilder took 628.53 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.2 MB in the beginning and 31.1 MB in the end (delta: -10.9 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2020-12-02 16:21:02,931 INFO L168 Benchmark]: TraceAbstraction took 5147.70 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 30.6 MB in the beginning and 34.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-12-02 16:21:02,931 INFO L168 Benchmark]: Witness Printer took 74.42 ms. Allocated memory is still 69.2 MB. Free memory was 34.3 MB in the beginning and 31.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:21:02,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 37.7 MB. Free memory was 20.1 MB in the beginning and 20.1 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 356.48 ms. Allocated memory is still 46.1 MB. Free memory was 23.6 MB in the beginning and 23.7 MB in the end (delta: -94.2 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.53 ms. Allocated memory is still 46.1 MB. Free memory was 23.7 MB in the beginning and 21.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.59 ms. Allocated memory is still 46.1 MB. Free memory was 21.8 MB in the beginning and 20.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 628.53 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.2 MB in the beginning and 31.1 MB in the end (delta: -10.9 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5147.70 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 30.6 MB in the beginning and 34.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Witness Printer took 74.42 ms. Allocated memory is still 69.2 MB. Free memory was 34.3 MB in the beginning and 31.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 81]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L75] EXPR 0.0f [L75] float x = 0.0f; [L76] EXPR 0.0f [L76] EXPR -0.0f [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L46] COND FALSE !(__fpclassify_float(x) == 0) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y [L53] return x > y ? x : y; [L77] float res = fmax_float(x, y); [L80] EXPR 0.0f [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L57] __uint32_t w; [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 191 SDslu, 324 SDs, 0 SdLazy, 100 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 45 QuantifiedInterpolants, 32777 SizeOfPredicates, 26 NumberOfNonLiveVariables, 417 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...