./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.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 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:17:32,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:17:32,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:17:32,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:17:32,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:17:32,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:17:32,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:17:32,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:17:32,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:17:32,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:17:32,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:17:32,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:17:32,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:17:32,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:17:32,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:17:32,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:17:32,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:17:32,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:17:32,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:17:32,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:17:32,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:17:32,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:17:32,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:17:32,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:17:32,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:17:32,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:17:32,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:17:32,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:17:32,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:17:32,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:17:32,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:17:32,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:17:32,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:17:32,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:17:32,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:17:32,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:17:32,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:17:32,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:17:32,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:17:32,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:17:32,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:17:32,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:17:32,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:17:32,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:17:32,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:17:32,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:17:32,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:17:32,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:17:32,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:17:32,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:17:32,749 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:17:32,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:17:32,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:17:32,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:17:32,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:17:32,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:17:32,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:17:32,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:17:32,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:17:32,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:17:32,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:17:32,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:17:32,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:17:32,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:17:32,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:17:32,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:17:32,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:17:32,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:17:32,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:17:32,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:17:32,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:17:32,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:17:32,753 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:17:32,753 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:17:32,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:17:32,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:17:32,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-12-14 13:17:32,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:17:32,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:17:32,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:17:32,950 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:17:32,963 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:17:32,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-12-14 13:17:33,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b82199d9/2bdcc74daa5e47ebaaf96bd671ebbbb8/FLAG938c27076 [2021-12-14 13:17:33,369 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:17:33,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-12-14 13:17:33,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b82199d9/2bdcc74daa5e47ebaaf96bd671ebbbb8/FLAG938c27076 [2021-12-14 13:17:33,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b82199d9/2bdcc74daa5e47ebaaf96bd671ebbbb8 [2021-12-14 13:17:33,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:17:33,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:17:33,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:17:33,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:17:33,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:17:33,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:33,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b1afb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33, skipping insertion in model container [2021-12-14 13:17:33,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:33,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:17:33,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:17:33,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-12-14 13:17:33,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:17:33,958 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:17:33,970 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-12-14 13:17:33,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:17:33,982 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:17:33,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33 WrapperNode [2021-12-14 13:17:33,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:17:33,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:17:33,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:17:33,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:17:33,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:33,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,005 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 28 [2021-12-14 13:17:34,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:17:34,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:17:34,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:17:34,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:17:34,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:17:34,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:17:34,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:17:34,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:17:34,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (1/1) ... [2021-12-14 13:17:34,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:17:34,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:17:34,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 13:17:34,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 13:17:34,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:17:34,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:17:34,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:17:34,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:17:34,109 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:17:34,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:17:34,180 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:17:34,184 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:17:34,184 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 13:17:34,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:34 BoogieIcfgContainer [2021-12-14 13:17:34,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:17:34,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:17:34,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:17:34,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:17:34,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:17:33" (1/3) ... [2021-12-14 13:17:34,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a144387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:34, skipping insertion in model container [2021-12-14 13:17:34,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:33" (2/3) ... [2021-12-14 13:17:34,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a144387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:34, skipping insertion in model container [2021-12-14 13:17:34,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:34" (3/3) ... [2021-12-14 13:17:34,191 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-12-14 13:17:34,195 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:17:34,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:17:34,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:17:34,229 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:17:34,230 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:17:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:17:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-14 13:17:34,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:17:34,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-14 13:17:34,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:17:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:17:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-12-14 13:17:34,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:17:34,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203981182] [2021-12-14 13:17:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:17:34,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:17:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:17:34,327 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 13:17:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:17:34,363 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 13:17:34,364 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 13:17:34,365 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 13:17:34,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:17:34,370 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-14 13:17:34,373 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 13:17:34,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:17:34 BoogieIcfgContainer [2021-12-14 13:17:34,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 13:17:34,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 13:17:34,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 13:17:34,393 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 13:17:34,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:34" (3/4) ... [2021-12-14 13:17:34,395 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 13:17:34,396 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 13:17:34,397 INFO L158 Benchmark]: Toolchain (without parser) took 599.27ms. Allocated memory is still 127.9MB. Free memory was 97.8MB in the beginning and 78.4MB in the end (delta: 19.4MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2021-12-14 13:17:34,398 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 79.7MB. Free memory was 37.6MB in the beginning and 37.5MB in the end (delta: 29.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:17:34,398 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.23ms. Allocated memory is still 127.9MB. Free memory was 97.8MB in the beginning and 103.5MB in the end (delta: -5.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 13:17:34,399 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.80ms. Allocated memory is still 127.9MB. Free memory was 103.5MB in the beginning and 102.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:17:34,400 INFO L158 Benchmark]: Boogie Preprocessor took 10.41ms. Allocated memory is still 127.9MB. Free memory was 102.1MB in the beginning and 101.4MB in the end (delta: 647.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:17:34,403 INFO L158 Benchmark]: RCFGBuilder took 168.79ms. Allocated memory is still 127.9MB. Free memory was 100.8MB in the beginning and 91.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 13:17:34,403 INFO L158 Benchmark]: TraceAbstraction took 204.01ms. Allocated memory is still 127.9MB. Free memory was 91.6MB in the beginning and 79.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 13:17:34,404 INFO L158 Benchmark]: Witness Printer took 3.12ms. Allocated memory is still 127.9MB. Free memory was 79.0MB in the beginning and 78.4MB in the end (delta: 616.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:17:34,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 79.7MB. Free memory was 37.6MB in the beginning and 37.5MB in the end (delta: 29.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.23ms. Allocated memory is still 127.9MB. Free memory was 97.8MB in the beginning and 103.5MB in the end (delta: -5.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.80ms. Allocated memory is still 127.9MB. Free memory was 103.5MB in the beginning and 102.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.41ms. Allocated memory is still 127.9MB. Free memory was 102.1MB in the beginning and 101.4MB in the end (delta: 647.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 168.79ms. Allocated memory is still 127.9MB. Free memory was 100.8MB in the beginning and 91.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 204.01ms. Allocated memory is still 127.9MB. Free memory was 91.6MB in the beginning and 79.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.12ms. Allocated memory is still 127.9MB. Free memory was 79.0MB in the beginning and 78.4MB in the end (delta: 616.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L9] double main__x = 1.0; [L10] double main__x1 = main__x / 1.6; VAL [__return_main=0, main__x=1] [L12] COND FALSE !(main__x1 != main__x) [L21] int __tmp_1; [L22] __tmp_1 = main__x == 0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L27] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2021-12-14 13:17:34,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.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 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:17:35,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:17:35,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:17:35,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:17:35,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:17:35,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:17:35,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:17:35,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:17:35,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:17:35,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:17:35,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:17:35,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:17:35,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:17:36,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:17:36,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:17:36,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:17:36,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:17:36,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:17:36,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:17:36,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:17:36,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:17:36,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:17:36,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:17:36,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:17:36,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:17:36,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:17:36,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:17:36,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:17:36,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:17:36,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:17:36,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:17:36,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:17:36,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:17:36,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:17:36,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:17:36,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:17:36,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:17:36,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:17:36,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:17:36,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:17:36,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:17:36,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-14 13:17:36,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:17:36,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:17:36,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:17:36,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:17:36,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:17:36,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:17:36,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:17:36,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:17:36,080 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:17:36,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:17:36,080 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:17:36,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:17:36,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:17:36,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:17:36,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:17:36,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:17:36,081 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 13:17:36,082 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 13:17:36,082 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 13:17:36,082 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:17:36,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:17:36,082 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:17:36,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:17:36,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:17:36,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:17:36,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:17:36,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:17:36,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:17:36,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:17:36,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:17:36,084 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 13:17:36,084 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 13:17:36,084 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:17:36,084 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:17:36,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:17:36,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:17:36,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 13:17:36,085 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-12-14 13:17:36,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:17:36,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:17:36,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:17:36,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:17:36,358 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:17:36,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-12-14 13:17:36,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c358b33/447a4b64bbe144fba81020061dfe7b5d/FLAG8894ddefc [2021-12-14 13:17:36,765 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:17:36,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-12-14 13:17:36,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c358b33/447a4b64bbe144fba81020061dfe7b5d/FLAG8894ddefc [2021-12-14 13:17:36,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3c358b33/447a4b64bbe144fba81020061dfe7b5d [2021-12-14 13:17:36,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:17:36,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:17:36,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:17:36,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:17:36,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:17:36,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:36,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f422df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36, skipping insertion in model container [2021-12-14 13:17:36,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:36,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:17:36,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:17:36,928 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-12-14 13:17:36,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:17:36,944 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:17:36,957 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c[674,687] [2021-12-14 13:17:36,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:17:36,978 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:17:36,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36 WrapperNode [2021-12-14 13:17:36,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:17:36,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:17:36,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:17:36,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:17:36,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,013 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2021-12-14 13:17:37,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:17:37,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:17:37,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:17:37,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:17:37,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:17:37,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:17:37,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:17:37,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:17:37,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (1/1) ... [2021-12-14 13:17:37,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:17:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:17:37,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 13:17:37,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 13:17:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:17:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:17:37,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:17:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 13:17:37,147 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:17:37,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:17:40,846 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:17:40,850 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:17:40,850 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 13:17:40,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:40 BoogieIcfgContainer [2021-12-14 13:17:40,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:17:40,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:17:40,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:17:40,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:17:40,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:17:36" (1/3) ... [2021-12-14 13:17:40,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb00101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:40, skipping insertion in model container [2021-12-14 13:17:40,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:36" (2/3) ... [2021-12-14 13:17:40,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb00101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:40, skipping insertion in model container [2021-12-14 13:17:40,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:40" (3/3) ... [2021-12-14 13:17:40,871 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-12-14 13:17:40,875 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:17:40,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:17:40,914 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:17:40,922 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:17:40,922 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:17:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:17:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-14 13:17:40,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:17:40,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-14 13:17:40,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:17:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:17:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-12-14 13:17:40,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:17:40,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110369657] [2021-12-14 13:17:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:17:40,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:17:40,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:17:40,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:17:41,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 13:17:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:17:41,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:17:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:17:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:17:48,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:17:48,121 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:17:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110369657] [2021-12-14 13:17:48,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110369657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:17:48,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:17:48,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:17:48,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005299594] [2021-12-14 13:17:48,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:17:48,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:17:48,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:17:48,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:17:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:17:48,157 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:17:55,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-14 13:17:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:17:55,785 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-14 13:17:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:17:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-14 13:17:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:17:56,391 INFO L225 Difference]: With dead ends: 16 [2021-12-14 13:17:56,391 INFO L226 Difference]: Without dead ends: 7 [2021-12-14 13:17:56,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:17:56,405 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-14 13:17:56,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-12-14 13:17:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-12-14 13:17:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-12-14 13:17:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:17:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-12-14 13:17:56,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-12-14 13:17:56,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:17:56,434 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-12-14 13:17:56,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:17:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-12-14 13:17:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:17:56,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:17:56,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:17:56,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-14 13:17:56,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:17:56,653 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:17:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:17:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash 889537510, now seen corresponding path program 1 times [2021-12-14 13:17:56,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:17:56,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777759936] [2021-12-14 13:17:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:17:56,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:17:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:17:56,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:17:56,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 13:17:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:17:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 13:17:58,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:18:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:18:10,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:18:16,751 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) is different from false [2021-12-14 13:18:24,428 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-12-14 13:18:26,729 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-12-14 13:18:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-14 13:18:26,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:18:26,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777759936] [2021-12-14 13:18:26,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777759936] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:18:26,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 13:18:26,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-14 13:18:26,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275946759] [2021-12-14 13:18:26,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 13:18:26,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:18:26,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:18:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:18:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=20, Unknown=3, NotChecked=18, Total=56 [2021-12-14 13:18:26,733 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:18:29,063 WARN L860 $PredicateComparison]: unable to prove that (and (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-12-14 13:18:31,223 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse0) |c_ULTIMATE.start_main_~main__x1~0#1|)) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-12-14 13:18:33,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-14 13:18:34,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:18:34,882 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-12-14 13:18:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 13:18:34,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 13:18:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:18:34,884 INFO L225 Difference]: With dead ends: 11 [2021-12-14 13:18:34,884 INFO L226 Difference]: Without dead ends: 8 [2021-12-14 13:18:34,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=5, NotChecked=44, Total=90 [2021-12-14 13:18:34,885 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-14 13:18:34,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 7 Unchecked, 3.7s Time] [2021-12-14 13:18:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-14 13:18:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-14 13:18:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:18:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-14 13:18:34,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-14 13:18:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:18:34,888 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-14 13:18:34,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:18:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-14 13:18:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 13:18:34,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:18:34,889 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-12-14 13:18:34,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-14 13:18:35,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:18:35,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:18:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:18:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 2 times [2021-12-14 13:18:35,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:18:35,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946512436] [2021-12-14 13:18:35,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:18:35,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:18:35,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:18:35,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 13:18:35,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 13:18:37,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:18:37,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:18:37,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 13:18:37,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:18:48,370 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-14 13:18:50,784 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~main__x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true