./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/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-a4ecdab [2020-10-24 23:17:09,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:17:09,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:17:09,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:17:09,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:17:09,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:17:09,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:17:09,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:17:09,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:17:09,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:17:09,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:17:09,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:17:09,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:17:09,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:17:09,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:17:09,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:17:09,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:17:09,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:17:09,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:17:09,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:17:09,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:17:09,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:17:09,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:17:09,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:17:09,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:17:09,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:17:09,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:17:09,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:17:09,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:17:09,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:17:09,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:17:09,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:17:09,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:17:09,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:17:09,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:17:09,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:17:09,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:17:09,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:17:09,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:17:09,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:17:09,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:17:09,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 23:17:09,165 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:17:09,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:17:09,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:17:09,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:17:09,168 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:17:09,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:17:09,169 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:17:09,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 23:17:09,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:17:09,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:17:09,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:17:09,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:17:09,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:17:09,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:17:09,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:17:09,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:17:09,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:17:09,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:17:09,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:17:09,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:17:09,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:17:09,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:17:09,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:17:09,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:17:09,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:17:09,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 23:17:09,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 23:17:09,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:17:09,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:17:09,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51c288f40d68a666851060907ab6bc13e9c502d2 [2020-10-24 23:17:09,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:17:09,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:17:09,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:17:09,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:17:09,672 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:17:09,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-24 23:17:09,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d49a8588/ddce6b8f2ce54c6988924eedc295e0db/FLAGaebbcbde4 [2020-10-24 23:17:10,337 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:17:10,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-24 23:17:10,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d49a8588/ddce6b8f2ce54c6988924eedc295e0db/FLAGaebbcbde4 [2020-10-24 23:17:10,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d49a8588/ddce6b8f2ce54c6988924eedc295e0db [2020-10-24 23:17:10,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:17:10,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:17:10,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:17:10,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:17:10,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:17:10,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:10" (1/1) ... [2020-10-24 23:17:10,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c859cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:10, skipping insertion in model container [2020-10-24 23:17:10,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:10" (1/1) ... [2020-10-24 23:17:10,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:17:10,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:17:10,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:17:10,978 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:17:11,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:17:11,024 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:17:11,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11 WrapperNode [2020-10-24 23:17:11,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:17:11,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:17:11,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:17:11,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:17:11,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:17:11,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:17:11,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:17:11,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:17:11,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... [2020-10-24 23:17:11,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:17:11,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:17:11,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:17:11,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:17:11,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:17:11,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 23:17:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:17:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 23:17:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:17:11,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:17:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 23:17:11,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:17:11,748 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:17:11,748 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-24 23:17:11,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:11 BoogieIcfgContainer [2020-10-24 23:17:11,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:17:11,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:17:11,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:17:11,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:17:11,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:17:10" (1/3) ... [2020-10-24 23:17:11,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93b6c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:11, skipping insertion in model container [2020-10-24 23:17:11,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:11" (2/3) ... [2020-10-24 23:17:11,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93b6c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:11, skipping insertion in model container [2020-10-24 23:17:11,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:11" (3/3) ... [2020-10-24 23:17:11,761 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1231b.c [2020-10-24 23:17:11,773 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:17:11,778 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:17:11,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:17:11,821 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:17:11,821 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:17:11,822 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:17:11,822 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:17:11,822 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:17:11,822 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:17:11,823 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:17:11,823 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:17:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-24 23:17:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:17:11,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:11,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:11,848 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-10-24 23:17:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:11,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144143257] [2020-10-24 23:17:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:12,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144143257] [2020-10-24 23:17:12,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:12,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 23:17:12,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123264400] [2020-10-24 23:17:12,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:17:12,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:17:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:17:12,058 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-24 23:17:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:12,078 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-24 23:17:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:17:12,079 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-24 23:17:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:12,091 INFO L225 Difference]: With dead ends: 57 [2020-10-24 23:17:12,091 INFO L226 Difference]: Without dead ends: 26 [2020-10-24 23:17:12,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:17:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-24 23:17:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-24 23:17:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-24 23:17:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-24 23:17:12,135 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-10-24 23:17:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:12,136 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-24 23:17:12,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:17:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-24 23:17:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 23:17:12,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:12,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:12,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 23:17:12,138 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:12,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-10-24 23:17:12,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:12,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654733909] [2020-10-24 23:17:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:12,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654733909] [2020-10-24 23:17:12,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:12,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:17:12,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060172096] [2020-10-24 23:17:12,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:17:12,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:17:12,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:17:12,248 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-10-24 23:17:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:12,319 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-24 23:17:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:17:12,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-24 23:17:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:12,322 INFO L225 Difference]: With dead ends: 40 [2020-10-24 23:17:12,322 INFO L226 Difference]: Without dead ends: 36 [2020-10-24 23:17:12,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:17:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-24 23:17:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-24 23:17:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:17:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-24 23:17:12,330 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-10-24 23:17:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:12,330 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-24 23:17:12,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:17:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-24 23:17:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-24 23:17:12,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:12,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:12,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 23:17:12,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:12,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-10-24 23:17:12,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:12,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335537768] [2020-10-24 23:17:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:12,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335537768] [2020-10-24 23:17:12,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:12,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:17:12,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480968156] [2020-10-24 23:17:12,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:17:12,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:17:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:17:12,411 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-24 23:17:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:12,473 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-24 23:17:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:17:12,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-24 23:17:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:12,475 INFO L225 Difference]: With dead ends: 42 [2020-10-24 23:17:12,475 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 23:17:12,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:17:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 23:17:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-24 23:17:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:17:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-24 23:17:12,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-10-24 23:17:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:12,482 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-24 23:17:12,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:17:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-24 23:17:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:17:12,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:12,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:12,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 23:17:12,484 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-10-24 23:17:12,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:12,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599824513] [2020-10-24 23:17:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:12,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599824513] [2020-10-24 23:17:12,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:12,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:17:12,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917880923] [2020-10-24 23:17:12,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:17:12,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:12,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:17:12,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:17:12,545 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-24 23:17:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:12,600 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-10-24 23:17:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:17:12,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:17:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:12,602 INFO L225 Difference]: With dead ends: 44 [2020-10-24 23:17:12,603 INFO L226 Difference]: Without dead ends: 40 [2020-10-24 23:17:12,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:17:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-24 23:17:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-10-24 23:17:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:17:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-24 23:17:12,609 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-10-24 23:17:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:12,609 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-24 23:17:12,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:17:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-24 23:17:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-24 23:17:12,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:12,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:12,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 23:17:12,611 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:12,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-10-24 23:17:12,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:12,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764183072] [2020-10-24 23:17:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:12,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764183072] [2020-10-24 23:17:12,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:12,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:17:12,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338397149] [2020-10-24 23:17:12,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:17:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:17:12,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:17:12,723 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-24 23:17:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:12,776 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-24 23:17:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:17:12,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-24 23:17:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:12,778 INFO L225 Difference]: With dead ends: 42 [2020-10-24 23:17:12,779 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 23:17:12,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:17:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 23:17:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-24 23:17:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:17:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-24 23:17:12,785 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-10-24 23:17:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:12,786 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-24 23:17:12,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:17:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-24 23:17:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-24 23:17:12,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:12,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:12,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 23:17:12,788 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-10-24 23:17:12,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:12,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504482342] [2020-10-24 23:17:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:17:12,827 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:17:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:17:12,875 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:17:12,916 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 23:17:12,916 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:17:12,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 23:17:12,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:17:12 BoogieIcfgContainer [2020-10-24 23:17:12,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:17:12,975 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:17:12,975 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:17:12,975 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:17:12,976 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:11" (3/4) ... [2020-10-24 23:17:12,979 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 23:17:12,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:17:12,984 INFO L168 Benchmark]: Toolchain (without parser) took 2267.85 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 35.6 MB in the beginning and 36.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:12,987 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 39.8 MB. Free memory was 26.4 MB in the beginning and 26.3 MB in the end (delta: 28.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:12,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.97 ms. Allocated memory is still 58.7 MB. Free memory was 35.1 MB in the beginning and 40.1 MB in the end (delta: -5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:12,995 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.61 ms. Allocated memory is still 58.7 MB. Free memory was 40.0 MB in the beginning and 38.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:12,996 INFO L168 Benchmark]: Boogie Preprocessor took 31.41 ms. Allocated memory is still 58.7 MB. Free memory was 38.3 MB in the beginning and 36.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:12,997 INFO L168 Benchmark]: RCFGBuilder took 646.12 ms. Allocated memory is still 58.7 MB. Free memory was 36.8 MB in the beginning and 32.9 MB in the end (delta: 3.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:12,998 INFO L168 Benchmark]: TraceAbstraction took 1219.29 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 32.6 MB in the beginning and 37.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:12,999 INFO L168 Benchmark]: Witness Printer took 5.20 ms. Allocated memory is still 71.3 MB. Free memory was 37.4 MB in the beginning and 36.9 MB in the end (delta: 509.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:13,003 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 39.8 MB. Free memory was 26.4 MB in the beginning and 26.3 MB in the end (delta: 28.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 304.97 ms. Allocated memory is still 58.7 MB. Free memory was 35.1 MB in the beginning and 40.1 MB in the end (delta: -5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.61 ms. Allocated memory is still 58.7 MB. Free memory was 40.0 MB in the beginning and 38.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.41 ms. Allocated memory is still 58.7 MB. Free memory was 38.3 MB in the beginning and 36.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 646.12 ms. Allocated memory is still 58.7 MB. Free memory was 36.8 MB in the beginning and 32.9 MB in the end (delta: 3.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1219.29 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 32.6 MB in the beginning and 37.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.20 ms. Allocated memory is still 71.3 MB. Free memory was 37.4 MB in the beginning and 36.9 MB in the end (delta: 509.7 kB). 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: 1.1s, 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-a4ecdab [2020-10-24 23:17:15,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:17:15,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:17:15,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:17:15,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:17:15,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:17:15,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:17:15,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:17:15,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:17:15,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:17:15,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:17:15,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:17:15,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:17:15,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:17:15,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:17:15,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:17:15,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:17:15,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:17:15,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:17:15,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:17:15,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:17:15,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:17:15,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:17:15,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:17:15,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:17:15,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:17:15,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:17:15,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:17:15,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:17:15,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:17:15,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:17:15,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:17:15,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:17:15,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:17:15,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:17:15,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:17:15,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:17:15,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:17:15,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:17:15,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:17:15,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:17:15,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 23:17:15,639 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:17:15,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:17:15,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:17:15,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:17:15,641 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:17:15,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:17:15,641 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:17:15,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:17:15,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:17:15,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:17:15,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:17:15,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:17:15,644 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 23:17:15,644 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 23:17:15,644 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:17:15,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:17:15,645 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:17:15,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:17:15,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:17:15,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:17:15,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:17:15,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:17:15,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:17:15,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:17:15,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:17:15,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:17:15,648 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 23:17:15,648 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 23:17:15,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:17:15,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:17:15,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 23:17:15,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51c288f40d68a666851060907ab6bc13e9c502d2 [2020-10-24 23:17:16,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:17:16,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:17:16,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:17:16,079 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:17:16,080 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:17:16,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-24 23:17:16,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317ebdc1b/019275a2b6dd41f5bacaf222ed1e88d5/FLAGeafee5e18 [2020-10-24 23:17:16,700 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:17:16,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1231b.c [2020-10-24 23:17:16,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317ebdc1b/019275a2b6dd41f5bacaf222ed1e88d5/FLAGeafee5e18 [2020-10-24 23:17:17,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317ebdc1b/019275a2b6dd41f5bacaf222ed1e88d5 [2020-10-24 23:17:17,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:17:17,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:17:17,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:17:17,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:17:17,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:17:17,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d155299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17, skipping insertion in model container [2020-10-24 23:17:17,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:17:17,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:17:17,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:17:17,378 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:17:17,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:17:17,441 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:17:17,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17 WrapperNode [2020-10-24 23:17:17,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:17:17,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:17:17,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:17:17,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:17:17,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:17:17,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:17:17,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:17:17,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:17:17,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... [2020-10-24 23:17:17,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:17:17,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:17:17,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:17:17,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:17:17,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:17:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-24 23:17:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 23:17:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:17:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-24 23:17:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:17:17,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:17:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:17:18,416 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:17:18,416 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-24 23:17:18,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:18 BoogieIcfgContainer [2020-10-24 23:17:18,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:17:18,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:17:18,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:17:18,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:17:18,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:17:17" (1/3) ... [2020-10-24 23:17:18,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790ff793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:18, skipping insertion in model container [2020-10-24 23:17:18,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:17" (2/3) ... [2020-10-24 23:17:18,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790ff793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:18, skipping insertion in model container [2020-10-24 23:17:18,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:18" (3/3) ... [2020-10-24 23:17:18,430 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1231b.c [2020-10-24 23:17:18,443 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:17:18,449 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:17:18,464 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:17:18,509 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:17:18,509 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:17:18,509 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:17:18,510 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:17:18,510 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:17:18,510 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:17:18,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:17:18,511 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:17:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-24 23:17:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:17:18,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:18,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:18,537 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-10-24 23:17:18,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:18,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394936517] [2020-10-24 23:17:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-24 23:17:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:18,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 23:17:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:17:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:18,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:17:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:18,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394936517] [2020-10-24 23:17:18,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:18,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 23:17:18,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485840520] [2020-10-24 23:17:18,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:17:18,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:17:18,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:17:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:17:18,771 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-24 23:17:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:18,796 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-24 23:17:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:17:18,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-24 23:17:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:18,808 INFO L225 Difference]: With dead ends: 57 [2020-10-24 23:17:18,809 INFO L226 Difference]: Without dead ends: 26 [2020-10-24 23:17:18,812 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 [2020-10-24 23:17:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-24 23:17:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-24 23:17:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-24 23:17:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-24 23:17:18,851 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-10-24 23:17:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:18,851 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-24 23:17:18,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:17:18,852 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-24 23:17:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 23:17:18,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:18,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:19,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 23:17:19,072 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:19,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-10-24 23:17:19,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:19,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517741725] [2020-10-24 23:17:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-24 23:17:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:19,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:17:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:17:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:19,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:17:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:19,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517741725] [2020-10-24 23:17:19,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:19,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:17:19,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406073646] [2020-10-24 23:17:19,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:17:19,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:17:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:17:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:17:19,396 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-10-24 23:17:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:19,642 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-10-24 23:17:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:17:19,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-24 23:17:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:19,644 INFO L225 Difference]: With dead ends: 50 [2020-10-24 23:17:19,644 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 23:17:19,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:17:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 23:17:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-10-24 23:17:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:17:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-24 23:17:19,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-10-24 23:17:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:19,653 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-24 23:17:19,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:17:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-24 23:17:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-24 23:17:19,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:19,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:19,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 23:17:19,871 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:19,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-10-24 23:17:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:19,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187252130] [2020-10-24 23:17:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-24 23:17:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:17:20,010 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:17:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:17:20,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:17:20,168 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 23:17:20,169 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:17:20,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 23:17:20,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:17:20 BoogieIcfgContainer [2020-10-24 23:17:20,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:17:20,404 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:17:20,405 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:17:20,405 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:17:20,406 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:18" (3/4) ... [2020-10-24 23:17:20,409 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 23:17:20,469 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 23:17:20,470 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:17:20,472 INFO L168 Benchmark]: Toolchain (without parser) took 3392.11 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.7 MB in the beginning and 39.0 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:20,473 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 44.0 MB. Free memory was 21.9 MB in the beginning and 21.9 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:20,474 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.21 ms. Allocated memory is still 56.6 MB. Free memory was 33.1 MB in the beginning and 35.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:20,475 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.81 ms. Allocated memory is still 56.6 MB. Free memory was 35.2 MB in the beginning and 33.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:20,476 INFO L168 Benchmark]: Boogie Preprocessor took 86.81 ms. Allocated memory is still 56.6 MB. Free memory was 33.4 MB in the beginning and 31.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:20,477 INFO L168 Benchmark]: RCFGBuilder took 801.15 ms. Allocated memory is still 56.6 MB. Free memory was 31.9 MB in the beginning and 39.0 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:20,478 INFO L168 Benchmark]: TraceAbstraction took 1982.05 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 38.5 MB in the beginning and 41.4 MB in the end (delta: -3.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:20,479 INFO L168 Benchmark]: Witness Printer took 65.34 ms. Allocated memory is still 69.2 MB. Free memory was 41.4 MB in the beginning and 39.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:20,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 44.0 MB. Free memory was 21.9 MB in the beginning and 21.9 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 357.21 ms. Allocated memory is still 56.6 MB. Free memory was 33.1 MB in the beginning and 35.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 83.81 ms. Allocated memory is still 56.6 MB. Free memory was 35.2 MB in the beginning and 33.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 86.81 ms. Allocated memory is still 56.6 MB. Free memory was 33.4 MB in the beginning and 31.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 801.15 ms. Allocated memory is still 56.6 MB. Free memory was 31.9 MB in the beginning and 39.0 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1982.05 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 38.5 MB in the beginning and 41.4 MB in the end (delta: -3.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Witness Printer took 65.34 ms. Allocated memory is still 69.2 MB. Free memory was 41.4 MB in the beginning and 39.0 MB in the end (delta: 2.4 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 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, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s 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...