./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51c288f40d68a666851060907ab6bc13e9c502d2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51c288f40d68a666851060907ab6bc13e9c502d2 ......................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 21:53:43,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:53:43,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:53:43,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:53:43,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:53:43,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:53:43,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:53:43,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:53:43,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:53:43,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:53:43,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:53:43,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:53:43,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:53:43,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:53:43,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:53:43,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:53:43,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:53:43,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:53:43,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:53:43,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:53:43,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:53:43,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:53:43,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:53:43,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:53:43,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:53:43,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:53:43,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:53:43,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:53:43,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:53:43,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:53:43,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:53:43,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:53:43,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:53:43,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:53:43,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:53:43,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:53:43,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:53:43,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:53:43,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:53:43,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:53:43,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:53:43,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 21:53:44,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:53:44,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:53:44,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:53:44,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:53:44,055 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:53:44,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:53:44,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:53:44,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 21:53:44,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:53:44,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:53:44,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:53:44,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:53:44,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:53:44,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:53:44,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:53:44,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:53:44,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:53:44,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:53:44,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:53:44,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:53:44,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:53:44,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:53:44,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:53:44,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:53:44,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:53:44,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 21:53:44,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 21:53:44,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:53:44,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:53:44,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51c288f40d68a666851060907ab6bc13e9c502d2 [2020-10-25 21:53:44,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:53:44,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:53:44,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:53:44,533 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:53:44,534 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:53:44,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-25 21:53:44,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f219ba8/4d8800c3ba864a1692aedd680905d5c6/FLAGa1012b2b3 [2020-10-25 21:53:45,206 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:53:45,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-25 21:53:45,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f219ba8/4d8800c3ba864a1692aedd680905d5c6/FLAGa1012b2b3 [2020-10-25 21:53:45,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f219ba8/4d8800c3ba864a1692aedd680905d5c6 [2020-10-25 21:53:45,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:53:45,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:53:45,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:53:45,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:53:45,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:53:45,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:53:45" (1/1) ... [2020-10-25 21:53:45,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a3dee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:45, skipping insertion in model container [2020-10-25 21:53:45,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:53:45" (1/1) ... [2020-10-25 21:53:45,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:53:45,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:53:45,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:53:45,954 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:53:45,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:53:45,999 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:53:46,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46 WrapperNode [2020-10-25 21:53:46,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:53:46,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:53:46,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:53:46,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:53:46,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:53:46,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:53:46,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:53:46,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:53:46,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... [2020-10-25 21:53:46,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:53:46,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:53:46,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:53:46,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:53:46,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:53:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 21:53:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:53:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-25 21:53:46,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:53:46,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:53:46,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 21:53:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 21:53:46,745 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:53:46,745 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-25 21:53:46,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:53:46 BoogieIcfgContainer [2020-10-25 21:53:46,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:53:46,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:53:46,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:53:46,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:53:46,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:53:45" (1/3) ... [2020-10-25 21:53:46,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5708a1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:53:46, skipping insertion in model container [2020-10-25 21:53:46,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:46" (2/3) ... [2020-10-25 21:53:46,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5708a1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:53:46, skipping insertion in model container [2020-10-25 21:53:46,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:53:46" (3/3) ... [2020-10-25 21:53:46,770 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1231b.c [2020-10-25 21:53:46,805 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:53:46,812 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:53:46,826 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:53:46,858 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:53:46,858 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:53:46,858 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:53:46,859 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:53:46,859 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:53:46,859 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:53:46,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:53:46,860 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:53:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-25 21:53:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 21:53:46,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:46,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:46,887 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:46,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-10-25 21:53:46,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:53:46,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113693149] [2020-10-25 21:53:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:53:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:53:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:47,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113693149] [2020-10-25 21:53:47,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:53:47,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 21:53:47,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603058560] [2020-10-25 21:53:47,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:53:47,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:53:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:53:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:53:47,118 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-25 21:53:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:53:47,142 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-25 21:53:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:53:47,144 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-25 21:53:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:53:47,156 INFO L225 Difference]: With dead ends: 57 [2020-10-25 21:53:47,156 INFO L226 Difference]: Without dead ends: 26 [2020-10-25 21:53:47,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:53:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-25 21:53:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-25 21:53:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 21:53:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-25 21:53:47,203 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-10-25 21:53:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:53:47,204 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-25 21:53:47,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:53:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-25 21:53:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 21:53:47,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:47,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:47,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 21:53:47,206 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:47,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-10-25 21:53:47,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:53:47,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023540931] [2020-10-25 21:53:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:53:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:53:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:47,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023540931] [2020-10-25 21:53:47,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:53:47,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 21:53:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909181777] [2020-10-25 21:53:47,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 21:53:47,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:53:47,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 21:53:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 21:53:47,435 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-10-25 21:53:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:53:47,520 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-25 21:53:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 21:53:47,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-25 21:53:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:53:47,522 INFO L225 Difference]: With dead ends: 40 [2020-10-25 21:53:47,523 INFO L226 Difference]: Without dead ends: 36 [2020-10-25 21:53:47,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 21:53:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-25 21:53:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-25 21:53:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 21:53:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-25 21:53:47,532 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-10-25 21:53:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:53:47,533 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-25 21:53:47,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 21:53:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-25 21:53:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 21:53:47,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:47,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:47,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 21:53:47,535 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:47,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:47,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-10-25 21:53:47,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:53:47,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230375119] [2020-10-25 21:53:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:53:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:53:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:47,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230375119] [2020-10-25 21:53:47,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:53:47,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 21:53:47,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390202667] [2020-10-25 21:53:47,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 21:53:47,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:53:47,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 21:53:47,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 21:53:47,598 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-25 21:53:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:53:47,676 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-25 21:53:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 21:53:47,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-25 21:53:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:53:47,679 INFO L225 Difference]: With dead ends: 42 [2020-10-25 21:53:47,679 INFO L226 Difference]: Without dead ends: 38 [2020-10-25 21:53:47,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 21:53:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-25 21:53:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-25 21:53:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 21:53:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-25 21:53:47,687 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-10-25 21:53:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:53:47,688 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-25 21:53:47,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 21:53:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-25 21:53:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 21:53:47,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:47,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:47,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 21:53:47,690 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:47,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-10-25 21:53:47,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:53:47,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198739801] [2020-10-25 21:53:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:53:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:53:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:47,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198739801] [2020-10-25 21:53:47,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:53:47,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 21:53:47,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974716346] [2020-10-25 21:53:47,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 21:53:47,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:53:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 21:53:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 21:53:47,750 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-25 21:53:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:53:47,816 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-10-25 21:53:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 21:53:47,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-25 21:53:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:53:47,820 INFO L225 Difference]: With dead ends: 44 [2020-10-25 21:53:47,820 INFO L226 Difference]: Without dead ends: 40 [2020-10-25 21:53:47,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 21:53:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-25 21:53:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-10-25 21:53:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 21:53:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-25 21:53:47,830 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-10-25 21:53:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:53:47,830 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-25 21:53:47,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 21:53:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-25 21:53:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 21:53:47,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:47,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:47,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 21:53:47,832 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-10-25 21:53:47,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:53:47,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462647966] [2020-10-25 21:53:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:53:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:53:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:47,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462647966] [2020-10-25 21:53:47,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:53:47,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 21:53:47,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941663457] [2020-10-25 21:53:47,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 21:53:47,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:53:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 21:53:47,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 21:53:47,889 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-25 21:53:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:53:47,947 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-25 21:53:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 21:53:47,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-25 21:53:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:53:47,949 INFO L225 Difference]: With dead ends: 42 [2020-10-25 21:53:47,949 INFO L226 Difference]: Without dead ends: 38 [2020-10-25 21:53:47,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 21:53:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-25 21:53:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-25 21:53:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 21:53:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-25 21:53:47,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-10-25 21:53:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:53:47,957 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-25 21:53:47,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 21:53:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-25 21:53:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 21:53:47,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:47,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:47,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 21:53:47,959 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:47,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-10-25 21:53:47,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:53:47,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145524411] [2020-10-25 21:53:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:53:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:53:47,996 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:53:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:53:48,021 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:53:48,053 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 21:53:48,053 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:53:48,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-25 21:53:48,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:53:48 BoogieIcfgContainer [2020-10-25 21:53:48,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:53:48,092 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:53:48,092 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:53:48,092 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:53:48,093 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:53:46" (3/4) ... [2020-10-25 21:53:48,097 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 21:53:48,098 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:53:48,100 INFO L168 Benchmark]: Toolchain (without parser) took 2521.44 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 21.2 MB in the beginning and 37.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:48,101 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 44.0 MB. Free memory is still 23.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:53:48,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.36 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.6 MB in the beginning and 30.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:48,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.09 ms. Allocated memory is still 54.5 MB. Free memory was 30.0 MB in the beginning and 28.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:48,104 INFO L168 Benchmark]: Boogie Preprocessor took 36.54 ms. Allocated memory is still 54.5 MB. Free memory was 28.1 MB in the beginning and 26.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:48,105 INFO L168 Benchmark]: RCFGBuilder took 658.79 ms. Allocated memory is still 54.5 MB. Free memory was 26.7 MB in the beginning and 22.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:48,106 INFO L168 Benchmark]: TraceAbstraction took 1336.67 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 22.1 MB in the beginning and 38.4 MB in the end (delta: -16.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:53:48,107 INFO L168 Benchmark]: Witness Printer took 5.84 ms. Allocated memory is still 67.1 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:53:48,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 44.0 MB. Free memory is still 23.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 407.36 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.6 MB in the beginning and 30.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.09 ms. Allocated memory is still 54.5 MB. Free memory was 30.0 MB in the beginning and 28.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.54 ms. Allocated memory is still 54.5 MB. Free memory was 28.1 MB in the beginning and 26.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 658.79 ms. Allocated memory is still 54.5 MB. Free memory was 26.7 MB in the beginning and 22.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1336.67 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 22.1 MB in the beginning and 38.4 MB in the end (delta: -16.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.84 ms. Allocated memory is still 67.1 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 69, overapproximation of someBinaryArithmeticDOUBLEoperation at line 63. Possible FailurePath: [L62] double x = __VERIFIER_nondet_double(); [L63] double y = 0.0 / 0.0; [L18] return x != x; [L64] COND TRUE !isnan_double(x) [L20] __uint32_t msw, lsw; [L23] ieee_double_shape_type ew_u; [L24] ew_u.value = (x) [L25] EXPR ew_u.parts.msw [L25] (msw) = ew_u.parts.msw [L26] EXPR ew_u.parts.lsw [L26] (lsw) = ew_u.parts.lsw [L29-L30] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L32-L33] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L35-L36] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L39-L40] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L43] return 0; [L47] COND TRUE __fpclassify_double(x) == 0 [L48] return y; [L66] double res = fmin_double(x, y); [L69] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1231b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 40 SDslu, 242 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-5485861 [2020-10-25 21:53:50,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:53:50,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:53:50,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:53:50,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:53:50,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:53:50,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:53:50,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:53:50,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:53:50,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:53:50,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:53:50,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:53:50,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:53:50,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:53:50,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:53:50,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:53:50,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:53:50,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:53:50,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:53:50,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:53:50,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:53:50,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:53:50,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:53:50,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:53:50,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:53:50,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:53:50,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:53:50,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:53:50,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:53:50,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:53:50,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:53:50,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:53:50,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:53:50,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:53:50,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:53:50,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:53:50,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:53:50,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:53:50,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:53:50,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:53:50,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:53:50,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 21:53:51,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:53:51,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:53:51,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:53:51,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:53:51,011 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:53:51,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:53:51,011 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:53:51,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:53:51,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:53:51,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:53:51,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:53:51,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:53:51,014 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 21:53:51,014 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 21:53:51,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:53:51,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:53:51,015 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:53:51,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:53:51,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:53:51,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:53:51,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:53:51,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:53:51,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:53:51,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:53:51,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:53:51,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:53:51,017 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 21:53:51,018 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 21:53:51,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:53:51,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:53:51,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 21:53:51,019 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51c288f40d68a666851060907ab6bc13e9c502d2 [2020-10-25 21:53:51,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:53:51,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:53:51,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:53:51,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:53:51,557 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:53:51,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-25 21:53:51,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0f98fa2/c455cf2e4c6e431ebdb72acd9981707e/FLAG99e5a55a2 [2020-10-25 21:53:52,436 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:53:52,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-25 21:53:52,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0f98fa2/c455cf2e4c6e431ebdb72acd9981707e/FLAG99e5a55a2 [2020-10-25 21:53:52,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0f98fa2/c455cf2e4c6e431ebdb72acd9981707e [2020-10-25 21:53:52,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:53:52,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:53:52,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:53:52,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:53:52,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:53:52,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:53:52" (1/1) ... [2020-10-25 21:53:52,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543a992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:52, skipping insertion in model container [2020-10-25 21:53:52,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:53:52" (1/1) ... [2020-10-25 21:53:52,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:53:52,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:53:53,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:53:53,109 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:53:53,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:53:53,169 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:53:53,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53 WrapperNode [2020-10-25 21:53:53,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:53:53,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:53:53,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:53:53,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:53:53,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:53:53,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:53:53,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:53:53,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:53:53,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... [2020-10-25 21:53:53,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:53:53,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:53:53,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:53:53,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:53:53,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:53:53,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-25 21:53:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 21:53:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:53:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-25 21:53:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:53:53,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:53:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 21:53:53,857 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:53:53,857 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-25 21:53:53,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:53:53 BoogieIcfgContainer [2020-10-25 21:53:53,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:53:53,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:53:53,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:53:53,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:53:53,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:53:52" (1/3) ... [2020-10-25 21:53:53,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20667159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:53:53, skipping insertion in model container [2020-10-25 21:53:53,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:53:53" (2/3) ... [2020-10-25 21:53:53,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20667159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:53:53, skipping insertion in model container [2020-10-25 21:53:53,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:53:53" (3/3) ... [2020-10-25 21:53:53,870 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1231b.c [2020-10-25 21:53:53,883 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:53:53,889 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:53:53,906 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:53:53,939 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:53:53,940 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:53:53,940 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:53:53,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:53:53,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:53:53,941 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:53:53,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:53:53,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:53:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-25 21:53:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 21:53:53,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:53,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:53,968 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:53,975 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-10-25 21:53:53,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:53:53,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91660871] [2020-10-25 21:53:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-25 21:53:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:53:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 21:53:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 21:53:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:54,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 21:53:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91660871] [2020-10-25 21:53:54,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:53:54,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 21:53:54,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96598275] [2020-10-25 21:53:54,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:53:54,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 21:53:54,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:53:54,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:53:54,188 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-25 21:53:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:53:54,220 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-25 21:53:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:53:54,221 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-25 21:53:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:53:54,232 INFO L225 Difference]: With dead ends: 57 [2020-10-25 21:53:54,232 INFO L226 Difference]: Without dead ends: 26 [2020-10-25 21:53:54,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:53:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-25 21:53:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-25 21:53:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 21:53:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-25 21:53:54,278 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-10-25 21:53:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:53:54,279 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-25 21:53:54,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:53:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-25 21:53:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 21:53:54,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:54,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:54,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 21:53:54,495 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:54,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:54,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-10-25 21:53:54,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:53:54,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827197329] [2020-10-25 21:53:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-25 21:53:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:53:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 21:53:54,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 21:53:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:54,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 21:53:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:53:54,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827197329] [2020-10-25 21:53:54,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:53:54,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-25 21:53:54,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179727710] [2020-10-25 21:53:54,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 21:53:54,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 21:53:54,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 21:53:54,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 21:53:54,746 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-10-25 21:53:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:53:55,018 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-10-25 21:53:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 21:53:55,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-25 21:53:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:53:55,020 INFO L225 Difference]: With dead ends: 50 [2020-10-25 21:53:55,020 INFO L226 Difference]: Without dead ends: 46 [2020-10-25 21:53:55,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-25 21:53:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-25 21:53:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-10-25 21:53:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 21:53:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-25 21:53:55,030 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-10-25 21:53:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:53:55,030 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-25 21:53:55,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 21:53:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-25 21:53:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 21:53:55,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:53:55,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:53:55,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 21:53:55,246 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:53:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:53:55,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-10-25 21:53:55,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:53:55,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015043459] [2020-10-25 21:53:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-25 21:53:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:53:55,392 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:53:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:53:55,501 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:53:55,549 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 21:53:55,549 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:53:55,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-25 21:53:55,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:53:55 BoogieIcfgContainer [2020-10-25 21:53:55,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:53:55,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:53:55,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:53:55,804 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:53:55,805 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:53:53" (3/4) ... [2020-10-25 21:53:55,807 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 21:53:55,860 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 21:53:55,861 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:53:55,864 INFO L168 Benchmark]: Toolchain (without parser) took 3100.57 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.6 MB in the beginning and 22.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:55,865 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 50.3 MB. Free memory is still 35.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:53:55,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.87 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 29.6 MB in the end (delta: -2.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:55,866 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.12 ms. Allocated memory is still 50.3 MB. Free memory was 29.4 MB in the beginning and 27.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:55,867 INFO L168 Benchmark]: Boogie Preprocessor took 63.29 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:53:55,868 INFO L168 Benchmark]: RCFGBuilder took 544.35 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.9 MB in the beginning and 43.5 MB in the end (delta: -17.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:55,869 INFO L168 Benchmark]: TraceAbstraction took 1941.60 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 25.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:55,870 INFO L168 Benchmark]: Witness Printer took 57.22 ms. Allocated memory is still 60.8 MB. Free memory was 25.4 MB in the beginning and 22.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:53:55,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 50.3 MB. Free memory is still 35.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 400.87 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 29.6 MB in the end (delta: -2.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 78.12 ms. Allocated memory is still 50.3 MB. Free memory was 29.4 MB in the beginning and 27.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.29 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 544.35 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.9 MB in the beginning and 43.5 MB in the end (delta: -17.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1941.60 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 25.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. * Witness Printer took 57.22 ms. Allocated memory is still 60.8 MB. Free memory was 25.4 MB in the beginning and 22.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L62] double x = __VERIFIER_nondet_double(); [L63] double y = 0.0 / 0.0; [L18] return x != x; [L64] COND TRUE !isnan_double(x) [L20] __uint32_t msw, lsw; [L23] ieee_double_shape_type ew_u; [L24] ew_u.value = (x) [L25] EXPR ew_u.parts.msw [L25] (msw) = ew_u.parts.msw [L26] EXPR ew_u.parts.lsw [L26] (lsw) = ew_u.parts.lsw [L29-L30] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L32-L33] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L35-L36] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L39-L40] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L43] return 0; [L47] COND TRUE __fpclassify_double(x) == 0 [L48] return y; [L66] double res = fmin_double(x, y); [L69] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1231b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 98 SDs, 0 SdLazy, 27 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...