./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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_1232b.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 c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_1.3.100.v20150511-1540.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_1232b.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 c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:33:20,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:33:20,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:33:20,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:33:20,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:33:20,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:33:20,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:33:20,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:33:20,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:33:20,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:33:20,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:33:20,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:33:20,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:33:20,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:33:20,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:33:20,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:33:20,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:33:20,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:33:20,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:33:20,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:33:20,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:33:20,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:33:20,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:33:20,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:33:20,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:33:20,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:33:20,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:33:20,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:33:20,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:33:20,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:33:20,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:33:20,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:33:20,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:33:20,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:33:20,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:33:20,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:33:20,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:33:20,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:33:20,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:33:20,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:33:20,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:33:20,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:33:20,834 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:33:20,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:33:20,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:33:20,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:33:20,837 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:33:20,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:33:20,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:33:20,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:33:20,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:33:20,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:33:20,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:33:20,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:33:20,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:33:20,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:33:20,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:33:20,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:33:20,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:33:20,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:33:20,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:33:20,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:33:20,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:33:20,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:20,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:33:20,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:33:20,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:33:20,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:33:20,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:33:20,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:33:20,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:33:20,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /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 -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2020-10-20 00:33:21,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:33:21,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:33:21,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:33:21,163 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:33:21,164 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:33:21,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2020-10-20 00:33:21,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e20df50/98c1569e893f48008a0febefb3e3af9b/FLAG84ab1abec [2020-10-20 00:33:21,858 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:33:21,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2020-10-20 00:33:21,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e20df50/98c1569e893f48008a0febefb3e3af9b/FLAG84ab1abec [2020-10-20 00:33:22,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e20df50/98c1569e893f48008a0febefb3e3af9b [2020-10-20 00:33:22,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:33:22,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:33:22,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:22,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:33:22,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:33:22,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4630e5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22, skipping insertion in model container [2020-10-20 00:33:22,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:33:22,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:33:22,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:22,508 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:33:22,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:22,557 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:33:22,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22 WrapperNode [2020-10-20 00:33:22,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:22,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:22,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:33:22,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:33:22,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:22,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:33:22,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:33:22,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:33:22,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (1/1) ... [2020-10-20 00:33:22,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:33:22,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:33:22,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:33:22,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:33:22,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (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 [2020-10-20 00:33:22,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:33:22,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:33:22,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:33:22,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:33:22,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:33:22,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:33:22,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:33:23,234 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:33:23,234 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:33:23,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:23 BoogieIcfgContainer [2020-10-20 00:33:23,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:33:23,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:33:23,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:33:23,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:33:23,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:33:22" (1/3) ... [2020-10-20 00:33:23,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@986b96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:23, skipping insertion in model container [2020-10-20 00:33:23,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:22" (2/3) ... [2020-10-20 00:33:23,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@986b96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:23, skipping insertion in model container [2020-10-20 00:33:23,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:23" (3/3) ... [2020-10-20 00:33:23,245 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2020-10-20 00:33:23,257 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:33:23,264 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:33:23,275 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:33:23,298 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:33:23,298 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:33:23,298 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:33:23,299 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:33:23,299 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:33:23,299 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:33:23,299 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:33:23,299 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:33:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:33:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:33:23,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:23,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:23,321 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:23,327 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:33:23,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:23,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689106716] [2020-10-20 00:33:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:23,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689106716] [2020-10-20 00:33:23,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:23,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:33:23,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112574504] [2020-10-20 00:33:23,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:33:23,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:33:23,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:23,538 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:33:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:23,570 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:33:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:33:23,571 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:33:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:23,596 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:33:23,596 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:33:23,601 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 [2020-10-20 00:33:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:33:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:33:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:33:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:33:23,658 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:33:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:23,658 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:33:23,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:33:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:33:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:33:23,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:23,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:23,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:33:23,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:23,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:23,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:33:23,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:23,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687185767] [2020-10-20 00:33:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:23,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687185767] [2020-10-20 00:33:23,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:23,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:23,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768417387] [2020-10-20 00:33:23,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:23,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:23,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:23,771 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-20 00:33:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:23,861 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-20 00:33:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:23,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:33:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:23,863 INFO L225 Difference]: With dead ends: 53 [2020-10-20 00:33:23,863 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 00:33:23,864 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 [2020-10-20 00:33:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 00:33:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-20 00:33:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:23,871 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:33:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:23,872 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:23,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:33:23,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:23,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:23,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:33:23,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:23,874 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-20 00:33:23,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:23,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140023871] [2020-10-20 00:33:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:23,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140023871] [2020-10-20 00:33:23,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:23,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:23,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033703121] [2020-10-20 00:33:23,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:23,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:23,934 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:33:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:23,991 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:33:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:23,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 00:33:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:23,992 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:33:23,993 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:33:23,993 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 [2020-10-20 00:33:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:33:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:33:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:23,999 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-20 00:33:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:23,999 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:24,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:33:24,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:24,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:24,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:33:24,004 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:24,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-20 00:33:24,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:24,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887621081] [2020-10-20 00:33:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:24,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887621081] [2020-10-20 00:33:24,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:24,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819397686] [2020-10-20 00:33:24,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:24,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:24,115 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:33:24,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:24,174 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-20 00:33:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:24,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 00:33:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:24,176 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:33:24,176 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 00:33:24,177 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 [2020-10-20 00:33:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 00:33:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-20 00:33:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:24,183 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-20 00:33:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:24,184 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:24,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:33:24,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:24,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:24,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:33:24,186 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:24,187 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-20 00:33:24,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:24,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472967581] [2020-10-20 00:33:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:24,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472967581] [2020-10-20 00:33:24,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:24,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:24,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870764146] [2020-10-20 00:33:24,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:24,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:24,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:24,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:24,242 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:33:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:24,303 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:33:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:24,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:33:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:24,308 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:33:24,308 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:33:24,308 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 [2020-10-20 00:33:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:33:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:33:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:24,313 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-20 00:33:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:24,314 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:24,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:33:24,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:24,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:24,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:33:24,315 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:33:24,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:24,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095138519] [2020-10-20 00:33:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:24,341 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:24,361 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:24,387 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:33:24,388 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:33:24,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:33:24,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:33:24 BoogieIcfgContainer [2020-10-20 00:33:24,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:33:24,432 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:33:24,432 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:33:24,432 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:33:24,433 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:23" (3/4) ... [2020-10-20 00:33:24,437 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:33:24,437 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:33:24,441 INFO L168 Benchmark]: Toolchain (without parser) took 2213.60 ms. Allocated memory was 40.9 MB in the beginning and 46.7 MB in the end (delta: 5.8 MB). Free memory was 18.8 MB in the beginning and 19.8 MB in the end (delta: -970.7 kB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:24,443 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.6 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:24,445 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.99 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 18.0 MB in the beginning and 17.5 MB in the end (delta: 466.8 kB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:24,451 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.22 ms. Allocated memory is still 41.9 MB. Free memory was 17.5 MB in the beginning and 15.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:24,452 INFO L168 Benchmark]: Boogie Preprocessor took 37.36 ms. Allocated memory is still 41.9 MB. Free memory was 15.3 MB in the beginning and 13.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:24,453 INFO L168 Benchmark]: RCFGBuilder took 584.15 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 13.6 MB in the beginning and 23.6 MB in the end (delta: -9.9 MB). Peak memory consumption was 4.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:24,454 INFO L168 Benchmark]: TraceAbstraction took 1193.49 ms. Allocated memory was 43.5 MB in the beginning and 46.7 MB in the end (delta: 3.1 MB). Free memory was 23.1 MB in the beginning and 20.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 5.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:24,459 INFO L168 Benchmark]: Witness Printer took 5.74 ms. Allocated memory is still 46.7 MB. Free memory was 20.5 MB in the beginning and 19.8 MB in the end (delta: 709.6 kB). Peak memory consumption was 709.6 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:24,473 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.6 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 326.99 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 18.0 MB in the beginning and 17.5 MB in the end (delta: 466.8 kB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 55.22 ms. Allocated memory is still 41.9 MB. Free memory was 17.5 MB in the beginning and 15.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 37.36 ms. Allocated memory is still 41.9 MB. Free memory was 15.3 MB in the beginning and 13.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 584.15 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 13.6 MB in the beginning and 23.6 MB in the end (delta: -9.9 MB). Peak memory consumption was 4.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1193.49 ms. Allocated memory was 43.5 MB in the beginning and 46.7 MB in the end (delta: 3.1 MB). Free memory was 23.1 MB in the beginning and 20.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 5.7 MB. Max. memory is 14.3 GB. * Witness Printer took 5.74 ms. Allocated memory is still 46.7 MB. Free memory was 20.5 MB in the beginning and 19.8 MB in the end (delta: 709.6 kB). Peak memory consumption was 709.6 kB. Max. memory is 14.3 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 81, overapproximation of someUnaryDOUBLEoperation at line 76. Possible FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L33-L34] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L36-L37] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L40-L41] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L44] return 0; [L48] COND TRUE __fpclassify_double(x) == 0 [L49] return y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L3] __assert_fail("0", "double_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:33:26,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:33:26,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:33:26,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:33:26,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:33:26,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:33:26,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:33:26,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:33:26,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:33:26,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:33:26,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:33:26,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:33:26,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:33:26,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:33:26,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:33:26,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:33:26,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:33:26,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:33:26,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:33:26,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:33:26,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:33:26,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:33:26,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:33:26,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:33:26,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:33:26,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:33:26,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:33:26,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:33:26,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:33:26,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:33:26,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:33:26,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:33:26,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:33:26,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:33:26,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:33:26,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:33:26,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:33:26,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:33:26,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:33:26,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:33:26,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:33:26,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:33:26,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:33:26,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:33:26,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:33:26,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:33:26,796 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:33:26,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:33:26,796 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:33:26,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:33:26,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:33:26,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:33:26,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:33:26,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:33:26,798 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:33:26,799 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:33:26,799 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:33:26,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:33:26,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:33:26,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:33:26,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:33:26,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:33:26,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:33:26,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:33:26,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:26,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:33:26,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:33:26,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:33:26,802 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:33:26,803 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:33:26,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:33:26,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:33:26,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:33:26,804 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /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 -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2020-10-20 00:33:27,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:33:27,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:33:27,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:33:27,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:33:27,048 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:33:27,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2020-10-20 00:33:27,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa32ac6c1/359604f932724604814ba59ccccf7190/FLAG3b5331dca [2020-10-20 00:33:27,609 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:33:27,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2020-10-20 00:33:27,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa32ac6c1/359604f932724604814ba59ccccf7190/FLAG3b5331dca [2020-10-20 00:33:28,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa32ac6c1/359604f932724604814ba59ccccf7190 [2020-10-20 00:33:28,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:33:28,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:33:28,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:28,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:33:28,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:33:28,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577379b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28, skipping insertion in model container [2020-10-20 00:33:28,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:33:28,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:33:28,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:28,448 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:33:28,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:28,553 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:33:28,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28 WrapperNode [2020-10-20 00:33:28,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:28,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:28,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:33:28,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:33:28,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:28,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:33:28,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:33:28,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:33:28,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:33:28,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:33:28,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:33:28,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:33:28,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (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 [2020-10-20 00:33:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-20 00:33:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:33:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:33:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:33:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:33:28,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:33:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:33:29,283 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:33:29,283 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:33:29,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:29 BoogieIcfgContainer [2020-10-20 00:33:29,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:33:29,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:33:29,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:33:29,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:33:29,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:33:28" (1/3) ... [2020-10-20 00:33:29,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5664b9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:29, skipping insertion in model container [2020-10-20 00:33:29,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (2/3) ... [2020-10-20 00:33:29,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5664b9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:29, skipping insertion in model container [2020-10-20 00:33:29,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:29" (3/3) ... [2020-10-20 00:33:29,298 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2020-10-20 00:33:29,314 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:33:29,325 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:33:29,342 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:33:29,370 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:33:29,370 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:33:29,371 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:33:29,371 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:33:29,371 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:33:29,372 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:33:29,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:33:29,372 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:33:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:33:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:33:29,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:29,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:29,398 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:33:29,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:29,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727074884] [2020-10-20 00:33:29,432 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 [2020-10-20 00:33:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:29,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:33:29,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:29,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:29,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727074884] [2020-10-20 00:33:29,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:29,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:33:29,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18985038] [2020-10-20 00:33:29,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:33:29,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:33:29,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:29,578 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:33:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:29,601 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:33:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:33:29,602 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:33:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:29,613 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:33:29,614 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:33:29,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:33:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:33:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:33:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:33:29,668 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:33:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:29,668 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:33:29,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:33:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:33:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:33:29,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:29,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:29,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:33:29,883 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:29,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:29,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:33:29,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:29,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715661624] [2020-10-20 00:33:29,886 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 [2020-10-20 00:33:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:29,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:33:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:30,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:30,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715661624] [2020-10-20 00:33:30,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:30,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:33:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176109909] [2020-10-20 00:33:30,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:33:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:33:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:33:30,089 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-20 00:33:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:30,201 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-20 00:33:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:33:30,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 00:33:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:30,203 INFO L225 Difference]: With dead ends: 68 [2020-10-20 00:33:30,203 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 00:33:30,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:33:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 00:33:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-20 00:33:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:30,213 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:33:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:30,213 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:30,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:33:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:33:30,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:30,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:30,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:33:30,437 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:33:30,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:30,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542041761] [2020-10-20 00:33:30,440 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 [2020-10-20 00:33:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:30,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:33:30,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:30,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:30,627 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 00:33:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:30,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542041761] [2020-10-20 00:33:30,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:30,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:33:30,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828071705] [2020-10-20 00:33:30,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:33:30,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:30,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:33:30,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:33:30,695 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2020-10-20 00:33:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:30,839 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-20 00:33:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:30,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-20 00:33:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:30,840 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:33:30,841 INFO L226 Difference]: Without dead ends: 28 [2020-10-20 00:33:30,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:33:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-20 00:33:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-20 00:33:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-20 00:33:30,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2020-10-20 00:33:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:30,848 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-20 00:33:30,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:33:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-20 00:33:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:33:30,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:30,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:31,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:33:31,067 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:31,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-20 00:33:31,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:31,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962599230] [2020-10-20 00:33:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:31,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:33:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:31,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962599230] [2020-10-20 00:33:31,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:31,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:33:31,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052428247] [2020-10-20 00:33:31,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:33:31,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:31,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:33:31,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:33:31,263 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2020-10-20 00:33:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:31,407 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-20 00:33:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:33:31,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 00:33:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:31,410 INFO L225 Difference]: With dead ends: 65 [2020-10-20 00:33:31,410 INFO L226 Difference]: Without dead ends: 56 [2020-10-20 00:33:31,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:33:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-20 00:33:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2020-10-20 00:33:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:33:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-20 00:33:31,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2020-10-20 00:33:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:31,424 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-20 00:33:31,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:33:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-20 00:33:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:33:31,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:31,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:31,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 00:33:31,641 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:31,642 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-20 00:33:31,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:31,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218294655] [2020-10-20 00:33:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:31,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:33:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:31,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:31,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218294655] [2020-10-20 00:33:31,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:31,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:33:31,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321553594] [2020-10-20 00:33:31,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:31,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:31,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:31,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:31,822 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-10-20 00:33:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:31,865 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-20 00:33:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:33:31,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 00:33:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:31,868 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:33:31,868 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 00:33:31,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 00:33:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 00:33:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:33:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-20 00:33:31,885 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2020-10-20 00:33:31,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:31,885 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-20 00:33:31,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-20 00:33:31,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:33:31,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:31,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:32,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-20 00:33:32,102 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-20 00:33:32,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:32,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381890130] [2020-10-20 00:33:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:33:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:32,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:32,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381890130] [2020-10-20 00:33:32,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:32,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-20 00:33:32,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919205087] [2020-10-20 00:33:32,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:33:32,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:33:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:33:32,327 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 9 states. [2020-10-20 00:33:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:32,464 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-20 00:33:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:33:32,465 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-20 00:33:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:32,466 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:33:32,467 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 00:33:32,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:33:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 00:33:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-20 00:33:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:33:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-20 00:33:32,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2020-10-20 00:33:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:32,474 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-20 00:33:32,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:33:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-20 00:33:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:33:32,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:32,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:32,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-20 00:33:32,684 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:32,685 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-20 00:33:32,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:32,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645150888] [2020-10-20 00:33:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:33:32,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:32,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:32,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645150888] [2020-10-20 00:33:32,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:32,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2020-10-20 00:33:32,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929611671] [2020-10-20 00:33:32,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:33:32,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:33:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:33:32,947 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2020-10-20 00:33:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:33,101 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-20 00:33:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:33:33,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-20 00:33:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:33,106 INFO L225 Difference]: With dead ends: 45 [2020-10-20 00:33:33,107 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 00:33:33,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:33:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 00:33:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 00:33:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:33:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-20 00:33:33,115 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2020-10-20 00:33:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:33,115 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-20 00:33:33,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:33:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-20 00:33:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 00:33:33,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:33,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:33,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-20 00:33:33,320 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:33,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-20 00:33:33,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:33,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488015241] [2020-10-20 00:33:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:33,544 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:33,849 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:33,916 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:33:33,917 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:33:34,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-20 00:33:34,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:33:34 BoogieIcfgContainer [2020-10-20 00:33:34,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:33:34,184 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:33:34,185 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:33:34,185 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:33:34,186 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:29" (3/4) ... [2020-10-20 00:33:34,188 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:33:34,264 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:33:34,265 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:33:34,267 INFO L168 Benchmark]: Toolchain (without parser) took 6217.89 ms. Allocated memory was 39.8 MB in the beginning and 50.3 MB in the end (delta: 10.5 MB). Free memory was 17.5 MB in the beginning and 18.3 MB in the end (delta: -813.9 kB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:34,268 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 30.9 MB. Free memory was 17.1 MB in the beginning and 17.0 MB in the end (delta: 32.1 kB). Peak memory consumption was 32.1 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:34,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 499.12 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 16.5 MB in the beginning and 14.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:34,270 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.41 ms. Allocated memory is still 40.9 MB. Free memory was 14.7 MB in the beginning and 12.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:34,270 INFO L168 Benchmark]: Boogie Preprocessor took 45.62 ms. Allocated memory is still 40.9 MB. Free memory was 12.4 MB in the beginning and 10.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:34,271 INFO L168 Benchmark]: RCFGBuilder took 597.89 ms. Allocated memory is still 42.5 MB. Free memory was 25.9 MB in the beginning and 16.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 15.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:34,272 INFO L168 Benchmark]: TraceAbstraction took 4896.00 ms. Allocated memory was 42.5 MB in the beginning and 50.3 MB in the end (delta: 7.9 MB). Free memory was 15.7 MB in the beginning and 21.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:34,272 INFO L168 Benchmark]: Witness Printer took 80.43 ms. Allocated memory is still 50.3 MB. Free memory was 21.6 MB in the beginning and 18.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:34,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 30.9 MB. Free memory was 17.1 MB in the beginning and 17.0 MB in the end (delta: 32.1 kB). Peak memory consumption was 32.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 499.12 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 16.5 MB in the beginning and 14.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 75.41 ms. Allocated memory is still 40.9 MB. Free memory was 14.7 MB in the beginning and 12.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 45.62 ms. Allocated memory is still 40.9 MB. Free memory was 12.4 MB in the beginning and 10.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 597.89 ms. Allocated memory is still 42.5 MB. Free memory was 25.9 MB in the beginning and 16.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 15.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4896.00 ms. Allocated memory was 42.5 MB in the beginning and 50.3 MB in the end (delta: 7.9 MB). Free memory was 15.7 MB in the beginning and 21.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Witness Printer took 80.43 ms. Allocated memory is still 50.3 MB. Free memory was 21.6 MB in the beginning and 18.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 14.3 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: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L48] COND FALSE !(__fpclassify_double(x) == 0) [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L50] COND FALSE !(__fpclassify_double(y) == 0) [L53] EXPR x < y ? x : y [L53] return x < y ? x : y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L57] __uint32_t msw; [L60] ieee_double_shape_type gh_u; [L61] gh_u.value = (x) [L62] EXPR gh_u.parts.msw [L62] (msw) = gh_u.parts.msw [L65] return (msw & 0x80000000) != 0; [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L3] __assert_fail("0", "double_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 257 SDslu, 359 SDs, 0 SdLazy, 130 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 10714 SizeOfPredicates, 27 NumberOfNonLiveVariables, 463 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...