./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i --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 -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 aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:17:37,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:17:37,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:17:37,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:17:37,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:17:37,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:17:37,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:17:37,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:17:37,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:17:37,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:17:37,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:17:37,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:17:37,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:17:37,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:17:37,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:17:37,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:17:37,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:17:37,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:17:37,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:17:37,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:17:37,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:17:37,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:17:37,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:17:37,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:17:37,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:17:37,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:17:37,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:17:37,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:17:37,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:17:37,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:17:37,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:17:37,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:17:37,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:17:37,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:17:37,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:17:37,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:17:37,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:17:37,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:17:37,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:17:37,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:17:37,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:17:37,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:17:37,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:17:37,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:17:37,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:17:37,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:17:37,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:17:37,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:17:37,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:17:37,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:17:37,603 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:17:37,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:17:37,604 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:17:37,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:17:37,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:17:37,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:17:37,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:17:37,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:17:37,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:17:37,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:17:37,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:17:37,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:17:37,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:17:37,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:17:37,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:17:37,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:17:37,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:17:37,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:17:37,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:17:37,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:17:37,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:17:37,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:17:37,608 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:17:37,608 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:17:37,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:17:37,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:17:37,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 [2021-12-14 13:17:37,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:17:37,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:17:37,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:17:37,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:17:37,896 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:17:37,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-12-14 13:17:37,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779148afd/462cce7fd9914513ab7cb98deefa7028/FLAG3e0ca7b75 [2021-12-14 13:17:38,400 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:17:38,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-12-14 13:17:38,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779148afd/462cce7fd9914513ab7cb98deefa7028/FLAG3e0ca7b75 [2021-12-14 13:17:38,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779148afd/462cce7fd9914513ab7cb98deefa7028 [2021-12-14 13:17:38,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:17:38,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:17:38,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:17:38,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:17:38,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:17:38,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:38" (1/1) ... [2021-12-14 13:17:38,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ea7492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:38, skipping insertion in model container [2021-12-14 13:17:38,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:38" (1/1) ... [2021-12-14 13:17:38,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:17:38,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:17:38,973 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[808,821] [2021-12-14 13:17:38,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:17:38,989 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:17:38,999 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[808,821] [2021-12-14 13:17:39,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:17:39,011 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:17:39,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39 WrapperNode [2021-12-14 13:17:39,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:17:39,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:17:39,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:17:39,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:17:39,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,038 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-12-14 13:17:39,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:17:39,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:17:39,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:17:39,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:17:39,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:17:39,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:17:39,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:17:39,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:17:39,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (1/1) ... [2021-12-14 13:17:39,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:17:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:17:39,097 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 13:17:39,111 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 13:17:39,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:17:39,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:17:39,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:17:39,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:17:39,182 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:17:39,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:17:39,277 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:17:39,282 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:17:39,282 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:17:39,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:39 BoogieIcfgContainer [2021-12-14 13:17:39,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:17:39,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:17:39,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:17:39,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:17:39,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:17:38" (1/3) ... [2021-12-14 13:17:39,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ded4fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:39, skipping insertion in model container [2021-12-14 13:17:39,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:39" (2/3) ... [2021-12-14 13:17:39,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ded4fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:39, skipping insertion in model container [2021-12-14 13:17:39,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:39" (3/3) ... [2021-12-14 13:17:39,292 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2021-12-14 13:17:39,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:17:39,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:17:39,343 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:17:39,352 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 13:17:39,352 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:17:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 13:17:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:17:39,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:17:39,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:17:39,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:17:39,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:17:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-14 13:17:39,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:17:39,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096370555] [2021-12-14 13:17:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:17:39,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:17:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:17:39,477 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 13:17:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:17:39,513 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 13:17:39,514 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 13:17:39,520 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 13:17:39,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:17:39,526 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-14 13:17:39,528 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 13:17:39,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:17:39 BoogieIcfgContainer [2021-12-14 13:17:39,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 13:17:39,543 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 13:17:39,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 13:17:39,544 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 13:17:39,544 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:39" (3/4) ... [2021-12-14 13:17:39,547 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 13:17:39,547 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 13:17:39,548 INFO L158 Benchmark]: Toolchain (without parser) took 728.70ms. Allocated memory is still 98.6MB. Free memory was 69.8MB in the beginning and 51.0MB in the end (delta: 18.8MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2021-12-14 13:17:39,549 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 98.6MB. Free memory was 55.0MB in the beginning and 54.9MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:17:39,549 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.75ms. Allocated memory is still 98.6MB. Free memory was 69.6MB in the beginning and 74.6MB in the end (delta: -5.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 13:17:39,565 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.59ms. Allocated memory is still 98.6MB. Free memory was 74.6MB in the beginning and 73.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:17:39,566 INFO L158 Benchmark]: Boogie Preprocessor took 24.12ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 72.0MB in the end (delta: 988.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:17:39,566 INFO L158 Benchmark]: RCFGBuilder took 219.65ms. Allocated memory is still 98.6MB. Free memory was 72.0MB in the beginning and 64.1MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 13:17:39,567 INFO L158 Benchmark]: TraceAbstraction took 257.26ms. Allocated memory is still 98.6MB. Free memory was 63.6MB in the beginning and 51.2MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 13:17:39,567 INFO L158 Benchmark]: Witness Printer took 3.78ms. Allocated memory is still 98.6MB. Free memory was 51.2MB in the beginning and 51.0MB in the end (delta: 192.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:17:39,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 98.6MB. Free memory was 55.0MB in the beginning and 54.9MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.75ms. Allocated memory is still 98.6MB. Free memory was 69.6MB in the beginning and 74.6MB in the end (delta: -5.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.59ms. Allocated memory is still 98.6MB. Free memory was 74.6MB in the beginning and 73.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.12ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 72.0MB in the end (delta: 988.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 219.65ms. Allocated memory is still 98.6MB. Free memory was 72.0MB in the beginning and 64.1MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 257.26ms. Allocated memory is still 98.6MB. Free memory was 63.6MB in the beginning and 51.2MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.78ms. Allocated memory is still 98.6MB. Free memory was 51.2MB in the beginning and 51.0MB in the end (delta: 192.6kB). 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: 13]: 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 29, overapproximation of someBinaryArithmeticDOUBLEoperation at line 21. Possible FailurePath: [L20] double x = 1.0; [L21] double x1 = x/1.6; VAL [x=1] [L23] COND FALSE !(x1 != x) VAL [x=1] [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, 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=11occurred 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, 6 NumberOfCodeBlocks, 6 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 13:17:39,609 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 -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 aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:17:41,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:17:41,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:17:41,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:17:41,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:17:41,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:17:41,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:17:41,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:17:41,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:17:41,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:17:41,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:17:41,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:17:41,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:17:41,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:17:41,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:17:41,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:17:41,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:17:41,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:17:41,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:17:41,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:17:41,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:17:41,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:17:41,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:17:41,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:17:41,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:17:41,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:17:41,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:17:41,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:17:41,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:17:41,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:17:41,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:17:41,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:17:41,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:17:41,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:17:41,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:17:41,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:17:41,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:17:41,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:17:41,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:17:41,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:17:41,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:17:41,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-14 13:17:41,673 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:17:41,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:17:41,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:17:41,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:17:41,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:17:41,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:17:41,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:17:41,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:17:41,677 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:17:41,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:17:41,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:17:41,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:17:41,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:17:41,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:17:41,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:17:41,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:17:41,679 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 13:17:41,679 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 13:17:41,680 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 13:17:41,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:17:41,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:17:41,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:17:41,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:17:41,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:17:41,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:17:41,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:17:41,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:17:41,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:17:41,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:17:41,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:17:41,682 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 13:17:41,682 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 13:17:41,683 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:17:41,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:17:41,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:17:41,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:17:41,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 13:17:41,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa004690edfde808b1aefac96308d2a9e2df62056aeddc89c51bd2015ab29125 [2021-12-14 13:17:41,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:17:41,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:17:42,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:17:42,004 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:17:42,004 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:17:42,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-12-14 13:17:42,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5385e6c47/4fa0b0544b3d4fa6846685ef81ec6202/FLAG5b44b7001 [2021-12-14 13:17:42,513 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:17:42,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i [2021-12-14 13:17:42,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5385e6c47/4fa0b0544b3d4fa6846685ef81ec6202/FLAG5b44b7001 [2021-12-14 13:17:42,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5385e6c47/4fa0b0544b3d4fa6846685ef81ec6202 [2021-12-14 13:17:42,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:17:42,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:17:42,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:17:42,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:17:42,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:17:42,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:42" (1/1) ... [2021-12-14 13:17:42,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4386e333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:42, skipping insertion in model container [2021-12-14 13:17:42,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:42" (1/1) ... [2021-12-14 13:17:42,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:17:42,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:17:43,087 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[808,821] [2021-12-14 13:17:43,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:17:43,106 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:17:43,115 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[808,821] [2021-12-14 13:17:43,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:17:43,141 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:17:43,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43 WrapperNode [2021-12-14 13:17:43,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:17:43,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:17:43,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:17:43,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:17:43,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,181 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-14 13:17:43,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:17:43,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:17:43,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:17:43,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:17:43,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:17:43,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:17:43,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:17:43,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:17:43,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (1/1) ... [2021-12-14 13:17:43,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:17:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:17:43,269 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 13:17:43,292 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 13:17:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:17:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 13:17:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:17:43,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:17:43,355 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:17:43,356 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:17:47,612 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:17:47,617 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:17:47,617 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:17:47,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:47 BoogieIcfgContainer [2021-12-14 13:17:47,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:17:47,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:17:47,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:17:47,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:17:47,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:17:42" (1/3) ... [2021-12-14 13:17:47,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162f5a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:47, skipping insertion in model container [2021-12-14 13:17:47,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:43" (2/3) ... [2021-12-14 13:17:47,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162f5a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:47, skipping insertion in model container [2021-12-14 13:17:47,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:47" (3/3) ... [2021-12-14 13:17:47,645 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2021-12-14 13:17:47,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:17:47,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:17:47,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:17:47,706 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 13:17:47,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:17:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 13:17:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:17:47,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:17:47,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:17:47,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:17:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:17:47,735 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-14 13:17:47,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:17:47,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523282653] [2021-12-14 13:17:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:17:47,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:17:47,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:17:47,753 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 13:17:47,760 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 13:17:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:17:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:17:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:17:54,526 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 13:17:54,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:17:54,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:17:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523282653] [2021-12-14 13:17:54,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523282653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:17:54,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:17:54,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:17:54,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209603159] [2021-12-14 13:17:54,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:17:54,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:17:54,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:17:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:17:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:17:54,557 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 13:17:57,668 WARN L860 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 11 53) roundNearestTiesToEven 1.0) |c_ULTIMATE.start_main_~x~0#1|) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div roundNearestTiesToEven |c_ULTIMATE.start_main_~x~0#1| ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-12-14 13:18:00,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-14 13:18:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:18:00,765 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-14 13:18:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:18:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 13:18:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:18:01,372 INFO L225 Difference]: With dead ends: 20 [2021-12-14 13:18:01,373 INFO L226 Difference]: Without dead ends: 8 [2021-12-14 13:18:01,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2021-12-14 13:18:01,378 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-14 13:18:01,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 1 Unchecked, 3.9s Time] [2021-12-14 13:18:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-14 13:18:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-14 13:18:01,403 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 13:18:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-14 13:18:01,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-14 13:18:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:18:01,404 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-14 13:18:01,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 13:18:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-14 13:18:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 13:18:01,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:18:01,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:18:01,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:18:01,607 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 13:18:01,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:18:01,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:18:01,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-14 13:18:01,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:18:01,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650010554] [2021-12-14 13:18:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:18:01,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:18:01,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:18:01,611 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 13:18:01,612 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 13:18:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:18:02,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 13:18:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:18:16,265 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 13:18:16,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:18:23,492 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) is different from false [2021-12-14 13:18:31,079 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 13:18:33,390 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 13:18:33,390 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 13:18:33,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:18:33,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650010554] [2021-12-14 13:18:33,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650010554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:18:33,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 13:18:33,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-14 13:18:33,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049071765] [2021-12-14 13:18:33,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 13:18:33,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:18:33,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:18:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:18:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=19, Unknown=4, NotChecked=18, Total=56 [2021-12-14 13:18:33,394 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 13:18:35,709 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 13:18:37,878 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) |c_ULTIMATE.start_main_~x1~0#1|)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-12-14 13:18:40,281 WARN L534 Checker$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 13:18:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:18:42,017 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-12-14 13:18:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 13:18:42,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 7 [2021-12-14 13:18:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:18:42,018 INFO L225 Difference]: With dead ends: 13 [2021-12-14 13:18:42,018 INFO L226 Difference]: Without dead ends: 9 [2021-12-14 13:18:42,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=19, Invalid=21, Unknown=6, NotChecked=44, Total=90 [2021-12-14 13:18:42,020 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:18:42,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 1 Unknown, 9 Unchecked, 4.2s Time] [2021-12-14 13:18:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-14 13:18:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-14 13:18:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 13:18:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-12-14 13:18:42,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-12-14 13:18:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:18:42,024 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-12-14 13:18:42,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 13:18:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-12-14 13:18:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 13:18:42,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:18:42,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-14 13:18:42,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:18:42,227 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 13:18:42,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:18:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:18:42,229 INFO L85 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-12-14 13:18:42,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:18:42,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729614968] [2021-12-14 13:18:42,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:18:42,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:18:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:18:42,231 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 13:18:42,232 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 13:18:44,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:18:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:18:44,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 13:18:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:18:55,690 WARN L227 SmtUtils]: Spent 5.12s 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 13:18:57,925 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_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