./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8e4dbe5a9ab518912f1108432d43f490ec977d7 .................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8e4dbe5a9ab518912f1108432d43f490ec977d7 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-cad4683 [2019-10-22 08:55:51,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:55:51,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:55:51,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:55:51,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:55:51,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:55:51,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:55:51,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:55:51,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:55:51,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:55:51,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:55:51,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:55:51,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:55:51,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:55:51,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:55:51,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:55:51,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:55:51,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:55:51,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:55:51,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:55:51,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:55:51,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:55:51,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:55:51,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:55:51,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:55:51,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:55:51,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:55:51,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:55:51,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:55:51,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:55:51,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:55:51,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:55:51,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:55:51,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:55:51,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:55:51,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:55:51,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:55:51,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:55:51,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:55:51,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:55:51,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:55:51,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:55:51,672 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:55:51,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:55:51,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:55:51,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:55:51,674 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:55:51,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:55:51,674 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:55:51,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:55:51,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:55:51,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:55:51,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:55:51,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:55:51,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:55:51,675 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:55:51,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:55:51,685 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:55:51,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:55:51,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:55:51,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:55:51,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:55:51,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:55:51,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:55:51,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:55:51,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:55:51,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:55:51,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:55:51,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:55:51,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:55:51,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer 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(__VERIFIER_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 -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2019-10-22 08:55:51,716 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:55:51,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:55:51,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:55:51,735 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:55:51,735 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:55:51,736 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-10-22 08:55:51,780 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data/543d5a8e8/3bbf79469abb4cf8955f266343f18601/FLAG50f8310ba [2019-10-22 08:55:52,195 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:55:52,195 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-10-22 08:55:52,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data/543d5a8e8/3bbf79469abb4cf8955f266343f18601/FLAG50f8310ba [2019-10-22 08:55:52,569 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data/543d5a8e8/3bbf79469abb4cf8955f266343f18601 [2019-10-22 08:55:52,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:55:52,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:55:52,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:52,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:55:52,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:55:52,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1044e2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52, skipping insertion in model container [2019-10-22 08:55:52,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,591 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:55:52,606 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:55:52,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:52,798 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:55:52,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:52,840 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:55:52,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52 WrapperNode [2019-10-22 08:55:52,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:52,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:52,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:55:52,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:55:52,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:52,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:55:52,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:55:52,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:55:52,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... [2019-10-22 08:55:52,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:55:52,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:55:52,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:55:52,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:55:52,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:55:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:55:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-10-22 08:55:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:55:52,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:55:52,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:55:52,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:55:53,264 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:55:53,264 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 08:55:53,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:53 BoogieIcfgContainer [2019-10-22 08:55:53,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:55:53,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:55:53,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:55:53,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:55:53,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:55:52" (1/3) ... [2019-10-22 08:55:53,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74459667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:55:53, skipping insertion in model container [2019-10-22 08:55:53,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:52" (2/3) ... [2019-10-22 08:55:53,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74459667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:55:53, skipping insertion in model container [2019-10-22 08:55:53,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:53" (3/3) ... [2019-10-22 08:55:53,273 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2019-10-22 08:55:53,281 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:55:53,287 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:55:53,294 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:55:53,313 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:55:53,313 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:55:53,313 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:55:53,313 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:55:53,315 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:55:53,315 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:55:53,315 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:55:53,315 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:55:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 08:55:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 08:55:53,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:53,332 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:53,334 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-10-22 08:55:53,344 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:53,344 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393898413] [2019-10-22 08:55:53,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:53,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:53,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:53,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393898413] [2019-10-22 08:55:53,436 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:53,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:55:53,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254445011] [2019-10-22 08:55:53,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:55:53,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:53,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:55:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:55:53,452 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-22 08:55:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:53,469 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-10-22 08:55:53,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:55:53,470 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 08:55:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:53,479 INFO L225 Difference]: With dead ends: 62 [2019-10-22 08:55:53,479 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:55:53,481 INFO L600 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 [2019-10-22 08:55:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:55:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 08:55:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:55:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-10-22 08:55:53,508 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-10-22 08:55:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:53,509 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-10-22 08:55:53,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:55:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-10-22 08:55:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:55:53,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:53,509 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:53,510 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:53,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-10-22 08:55:53,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:53,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871767162] [2019-10-22 08:55:53,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:53,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:53,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:53,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871767162] [2019-10-22 08:55:53,568 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:53,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:55:53,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400204501] [2019-10-22 08:55:53,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:55:53,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:53,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:55:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:55:53,570 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-10-22 08:55:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:53,622 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-10-22 08:55:53,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:55:53,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-22 08:55:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:53,623 INFO L225 Difference]: With dead ends: 53 [2019-10-22 08:55:53,623 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 08:55:53,624 INFO L600 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 [2019-10-22 08:55:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 08:55:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-10-22 08:55:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:55:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 08:55:53,629 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-10-22 08:55:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:53,629 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 08:55:53,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:55:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 08:55:53,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:55:53,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:53,630 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:53,631 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-10-22 08:55:53,631 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:53,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701578157] [2019-10-22 08:55:53,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:53,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:53,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:53,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701578157] [2019-10-22 08:55:53,688 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:53,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:55:53,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836434035] [2019-10-22 08:55:53,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:55:53,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:53,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:55:53,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:55:53,689 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-10-22 08:55:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:53,738 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-10-22 08:55:53,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:55:53,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 08:55:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:53,740 INFO L225 Difference]: With dead ends: 55 [2019-10-22 08:55:53,740 INFO L226 Difference]: Without dead ends: 46 [2019-10-22 08:55:53,740 INFO L600 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 [2019-10-22 08:55:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-22 08:55:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-10-22 08:55:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:55:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 08:55:53,745 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-10-22 08:55:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:53,745 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 08:55:53,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:55:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 08:55:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:55:53,746 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:53,746 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:53,746 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-10-22 08:55:53,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:53,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326066467] [2019-10-22 08:55:53,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:53,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:53,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:53,806 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:53,807 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:55:53,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:55:53 BoogieIcfgContainer [2019-10-22 08:55:53,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:55:53,829 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:55:53,829 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:55:53,829 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:55:53,830 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:53" (3/4) ... [2019-10-22 08:55:53,833 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 08:55:53,834 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:55:53,836 INFO L168 Benchmark]: Toolchain (without parser) took 1262.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -106.6 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:53,836 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:53,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:53,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:53,837 INFO L168 Benchmark]: Boogie Preprocessor took 29.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:53,838 INFO L168 Benchmark]: RCFGBuilder took 359.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:53,838 INFO L168 Benchmark]: TraceAbstraction took 562.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:53,839 INFO L168 Benchmark]: Witness Printer took 4.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:53,842 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 267.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 359.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 562.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 11.5 GB. * Witness Printer took 4.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 32 SDslu, 140 SDs, 0 SdLazy, 30 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 3 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 08:55:55,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:55:55,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:55:55,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:55:55,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:55:55,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:55:55,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:55:55,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:55:55,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:55:55,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:55:55,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:55:55,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:55:55,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:55:55,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:55:55,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:55:55,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:55:55,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:55:55,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:55:55,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:55:55,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:55:55,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:55:55,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:55:55,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:55:55,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:55:55,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:55:55,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:55:55,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:55:55,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:55:55,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:55:55,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:55:55,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:55:55,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:55:55,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:55:55,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:55:55,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:55:55,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:55:55,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:55:55,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:55:55,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:55:55,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:55:55,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:55:55,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-10-22 08:55:55,945 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:55:55,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:55:55,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:55:55,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:55:55,948 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:55:55,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:55:55,949 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:55:55,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:55:55,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:55:55,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:55:55,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:55:55,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:55:55,950 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 08:55:55,950 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 08:55:55,950 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:55:55,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:55:55,950 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:55:55,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:55:55,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:55:55,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:55:55,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:55:55,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:55:55,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:55:55,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:55:55,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:55:55,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:55:55,953 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-10-22 08:55:55,953 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 08:55:55,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:55:55,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 08:55:55,954 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer 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(__VERIFIER_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 -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2019-10-22 08:55:55,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:55:56,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:55:56,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:55:56,015 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:55:56,016 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:55:56,017 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-10-22 08:55:56,067 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data/89081e59d/e59fca4ee0864815a7ddd45235452c18/FLAGfb33afe5f [2019-10-22 08:55:56,475 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:55:56,481 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-10-22 08:55:56,487 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data/89081e59d/e59fca4ee0864815a7ddd45235452c18/FLAGfb33afe5f [2019-10-22 08:55:56,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/data/89081e59d/e59fca4ee0864815a7ddd45235452c18 [2019-10-22 08:55:56,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:55:56,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:55:56,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:56,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:55:56,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:55:56,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:56" (1/1) ... [2019-10-22 08:55:56,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@210406dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:56, skipping insertion in model container [2019-10-22 08:55:56,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:56" (1/1) ... [2019-10-22 08:55:56,886 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:55:56,901 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:55:57,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:57,101 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:55:57,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:57,158 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:55:57,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57 WrapperNode [2019-10-22 08:55:57,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:57,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:57,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:55:57,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:55:57,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:57,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:55:57,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:55:57,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:55:57,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... [2019-10-22 08:55:57,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:55:57,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:55:57,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:55:57,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:55:57,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:55:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:55:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 08:55:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:55:57,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:55:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2019-10-22 08:55:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:55:57,645 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:55:57,645 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 08:55:57,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:57 BoogieIcfgContainer [2019-10-22 08:55:57,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:55:57,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:55:57,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:55:57,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:55:57,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:55:56" (1/3) ... [2019-10-22 08:55:57,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2402e0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:55:57, skipping insertion in model container [2019-10-22 08:55:57,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:57" (2/3) ... [2019-10-22 08:55:57,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2402e0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:55:57, skipping insertion in model container [2019-10-22 08:55:57,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:57" (3/3) ... [2019-10-22 08:55:57,654 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2019-10-22 08:55:57,663 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:55:57,669 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:55:57,679 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:55:57,701 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:55:57,701 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:55:57,701 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:55:57,701 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:55:57,701 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:55:57,701 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:55:57,702 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:55:57,702 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:55:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 08:55:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 08:55:57,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:57,722 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:57,724 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-10-22 08:55:57,738 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:55:57,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684454466] [2019-10-22 08:55:57,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:55:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:57,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 08:55:57,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:57,836 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:55:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:57,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684454466] [2019-10-22 08:55:57,841 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:57,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 08:55:57,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991137393] [2019-10-22 08:55:57,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:55:57,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:55:57,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:55:57,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:55:57,866 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-22 08:55:57,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:57,886 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-10-22 08:55:57,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:55:57,888 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 08:55:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:57,910 INFO L225 Difference]: With dead ends: 62 [2019-10-22 08:55:57,910 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:55:57,913 INFO L600 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 [2019-10-22 08:55:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:55:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 08:55:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:55:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-10-22 08:55:57,947 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-10-22 08:55:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:57,947 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-10-22 08:55:57,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:55:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-10-22 08:55:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:55:57,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:57,948 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:58,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-10-22 08:55:58,149 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:58,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-10-22 08:55:58,150 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:55:58,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462509556] [2019-10-22 08:55:58,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:55:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:58,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:55:58,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:58,243 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:55:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:58,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462509556] [2019-10-22 08:55:58,264 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:58,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:55:58,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448646901] [2019-10-22 08:55:58,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:55:58,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:55:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:55:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:55:58,267 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-10-22 08:55:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:58,357 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-10-22 08:55:58,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:55:58,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-22 08:55:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:58,359 INFO L225 Difference]: With dead ends: 68 [2019-10-22 08:55:58,359 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 08:55:58,360 INFO L600 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 [2019-10-22 08:55:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 08:55:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-10-22 08:55:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:55:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 08:55:58,366 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-10-22 08:55:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:58,367 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 08:55:58,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:55:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 08:55:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:55:58,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:58,368 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:58,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-10-22 08:55:58,569 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:58,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-10-22 08:55:58,570 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:55:58,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284434160] [2019-10-22 08:55:58,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:55:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:58,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:55:58,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:58,649 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:55:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:58,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284434160] [2019-10-22 08:55:58,674 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:58,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-10-22 08:55:58,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805315913] [2019-10-22 08:55:58,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:55:58,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:55:58,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:55:58,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:55:58,676 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-10-22 08:55:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:58,745 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-10-22 08:55:58,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:55:58,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 08:55:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:58,746 INFO L225 Difference]: With dead ends: 52 [2019-10-22 08:55:58,746 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 08:55:58,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:55:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 08:55:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 08:55:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:55:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-10-22 08:55:58,750 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-10-22 08:55:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:58,751 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-10-22 08:55:58,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:55:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-10-22 08:55:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:55:58,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:58,753 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:58,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-10-22 08:55:58,954 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:58,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-10-22 08:55:58,955 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:55:58,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886361175] [2019-10-22 08:55:58,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:55:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:59,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:55:59,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:59,024 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:55:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:59,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886361175] [2019-10-22 08:55:59,047 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:59,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:55:59,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077547405] [2019-10-22 08:55:59,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:55:59,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:55:59,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:55:59,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:55:59,048 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-10-22 08:55:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:59,112 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-10-22 08:55:59,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:55:59,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-22 08:55:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:59,114 INFO L225 Difference]: With dead ends: 61 [2019-10-22 08:55:59,114 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 08:55:59,114 INFO L600 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 [2019-10-22 08:55:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 08:55:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-10-22 08:55:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 08:55:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-22 08:55:59,119 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-10-22 08:55:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:59,119 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-22 08:55:59,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:55:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-22 08:55:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 08:55:59,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:59,120 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:59,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-10-22 08:55:59,321 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-10-22 08:55:59,322 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:55:59,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950604854] [2019-10-22 08:55:59,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:55:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:59,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:55:59,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:59,399 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:55:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:59,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950604854] [2019-10-22 08:55:59,416 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:59,416 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 08:55:59,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699411954] [2019-10-22 08:55:59,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:55:59,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:55:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:55:59,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:55:59,418 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-10-22 08:55:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:59,429 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-10-22 08:55:59,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:55:59,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-22 08:55:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:59,430 INFO L225 Difference]: With dead ends: 38 [2019-10-22 08:55:59,430 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 08:55:59,431 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:55:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 08:55:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-22 08:55:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 08:55:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-22 08:55:59,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-10-22 08:55:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:59,435 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-22 08:55:59,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:55:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-22 08:55:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 08:55:59,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:59,436 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:59,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-10-22 08:55:59,638 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-10-22 08:55:59,638 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:55:59,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376860930] [2019-10-22 08:55:59,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:55:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:59,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:55:59,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:59,739 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:55:59,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:55:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:59,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376860930] [2019-10-22 08:55:59,787 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:59,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-10-22 08:55:59,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471814209] [2019-10-22 08:55:59,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:55:59,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:55:59,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:55:59,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:55:59,789 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2019-10-22 08:55:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:59,891 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-10-22 08:55:59,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:55:59,892 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-10-22 08:55:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:59,893 INFO L225 Difference]: With dead ends: 40 [2019-10-22 08:55:59,893 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 08:55:59,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:55:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 08:55:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-10-22 08:55:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 08:55:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-22 08:55:59,898 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2019-10-22 08:55:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:59,898 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-22 08:55:59,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:55:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-22 08:55:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:55:59,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:59,899 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:00,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-10-22 08:56:00,108 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-10-22 08:56:00,108 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:00,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546553349] [2019-10-22 08:56:00,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:56:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:00,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:56:00,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:00,212 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:00,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546553349] [2019-10-22 08:56:00,235 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:00,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-10-22 08:56:00,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235606476] [2019-10-22 08:56:00,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:56:00,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:00,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:56:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:56:00,236 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-10-22 08:56:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:00,294 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-22 08:56:00,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:00,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-22 08:56:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:00,300 INFO L225 Difference]: With dead ends: 43 [2019-10-22 08:56:00,300 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 08:56:00,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 08:56:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 08:56:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 08:56:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2019-10-22 08:56:00,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2019-10-22 08:56:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:00,304 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2019-10-22 08:56:00,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:56:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2019-10-22 08:56:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 08:56:00,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:00,305 INFO L380 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] [2019-10-22 08:56:00,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-10-22 08:56:00,516 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:00,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-10-22 08:56:00,517 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:00,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171330074] [2019-10-22 08:56:00,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/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 [2019-10-22 08:56:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:00,697 INFO L168 tionRefinementEngine]: Strategy WOLF found a feasible trace [2019-10-22 08:56:00,697 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:56:00,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-10-22 08:56:00,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:56:00 BoogieIcfgContainer [2019-10-22 08:56:00,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:56:00,935 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:00,935 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:00,935 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:00,935 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:57" (3/4) ... [2019-10-22 08:56:00,938 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:56:00,992 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f6407187-197c-4a72-bf2c-ccaa99d1b3dd/bin/uautomizer/witness.graphml [2019-10-22 08:56:00,993 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:00,995 INFO L168 Benchmark]: Toolchain (without parser) took 4122.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 947.0 MB in the beginning and 937.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 174.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:00,995 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:00,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.33 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 936.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:00,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 127.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 936.2 MB in the beginning and 1.2 GB in the end (delta: -222.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:00,996 INFO L168 Benchmark]: Boogie Preprocessor took 33.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:00,996 INFO L168 Benchmark]: RCFGBuilder took 325.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:00,997 INFO L168 Benchmark]: TraceAbstraction took 3286.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 944.0 MB in the end (delta: 183.3 MB). Peak memory consumption was 183.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:00,997 INFO L168 Benchmark]: Witness Printer took 58.18 ms. Allocated memory is still 1.2 GB. Free memory was 944.0 MB in the beginning and 937.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:00,999 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 286.33 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 936.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 127.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 936.2 MB in the beginning and 1.2 GB in the end (delta: -222.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 325.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3286.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 944.0 MB in the end (delta: 183.3 MB). Peak memory consumption was 183.3 MB. Max. memory is 11.5 GB. * Witness Printer took 58.18 ms. Allocated memory is still 1.2 GB. Free memory was 944.0 MB in the beginning and 937.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 79]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L44] COND FALSE !(__fpclassify_float(x) == 0) [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L48] COND FALSE !(__fpclassify_float(y) == 0) [L51] EXPR x > y ? x : y [L51] return x > y ? x : y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L55] __uint32_t w; [L58] ieee_float_shape_type gf_u; [L59] gf_u.value = (x) [L60] EXPR gf_u.word [L60] (w) = gf_u.word [L63] return (w & 0x80000000) != 0; [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.2s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 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, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7943 SizeOfPredicates, 27 NumberOfNonLiveVariables, 314 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...