./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-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 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 01:13:53,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:13:53,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:13:53,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:13:53,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:13:53,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:13:53,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:13:53,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:13:53,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:13:53,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:13:53,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:13:53,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:13:53,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:13:53,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:13:53,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:13:53,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:13:53,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:13:53,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:13:53,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:13:53,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:13:53,478 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:13:53,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:13:53,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:13:53,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:13:53,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:13:53,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:13:53,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:13:53,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:13:53,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:13:53,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:13:53,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:13:53,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:13:53,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:13:53,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:13:53,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:13:53,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:13:53,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:13:53,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:13:53,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:13:53,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:13:53,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:13:53,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:13:53,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 01:13:53,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:13:53,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:13:53,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:13:53,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:13:53,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:13:53,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:13:53,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:13:53,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:13:53,534 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:13:53,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:13:53,535 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:13:53,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 01:13:53,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:13:53,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:13:53,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:13:53,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:13:53,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:13:53,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:13:53,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:13:53,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:13:53,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:13:53,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:13:53,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:13:53,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:13:53,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:13:53,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:13:53,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:13:53,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:13:53,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 01:13:53,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 01:13:53,545 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:13:53,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:13:53,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:13:53,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 [2022-07-21 01:13:53,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:13:53,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:13:53,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:13:53,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:13:53,863 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:13:53,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2022-07-21 01:13:53,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1fb0ad7/672b5a3de1d24d4fa22723b3a6c8e887/FLAG4770e286e [2022-07-21 01:13:54,393 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:13:54,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2022-07-21 01:13:54,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1fb0ad7/672b5a3de1d24d4fa22723b3a6c8e887/FLAG4770e286e [2022-07-21 01:13:54,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1fb0ad7/672b5a3de1d24d4fa22723b3a6c8e887 [2022-07-21 01:13:54,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:13:54,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:13:54,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:13:54,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:13:54,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:13:54,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:13:54" (1/1) ... [2022-07-21 01:13:54,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63fb13e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:54, skipping insertion in model container [2022-07-21 01:13:54,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:13:54" (1/1) ... [2022-07-21 01:13:54,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:13:54,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:13:54,999 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/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2022-07-21 01:13:55,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:13:55,022 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:13:55,063 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/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2022-07-21 01:13:55,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:13:55,094 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:13:55,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55 WrapperNode [2022-07-21 01:13:55,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:13:55,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:13:55,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:13:55,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:13:55,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,144 INFO L137 Inliner]: procedures = 18, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 147 [2022-07-21 01:13:55,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:13:55,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:13:55,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:13:55,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:13:55,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:13:55,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:13:55,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:13:55,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:13:55,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (1/1) ... [2022-07-21 01:13:55,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:13:55,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:13:55,233 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) [2022-07-21 01:13:55,258 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 [2022-07-21 01:13:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:13:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 01:13:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 01:13:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-07-21 01:13:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:13:55,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:13:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2022-07-21 01:13:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 01:13:55,367 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:13:55,368 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:13:55,552 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:13:55,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:13:55,557 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 01:13:55,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:13:55 BoogieIcfgContainer [2022-07-21 01:13:55,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:13:55,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:13:55,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:13:55,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:13:55,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:13:54" (1/3) ... [2022-07-21 01:13:55,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263b15a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:13:55, skipping insertion in model container [2022-07-21 01:13:55,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:55" (2/3) ... [2022-07-21 01:13:55,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263b15a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:13:55, skipping insertion in model container [2022-07-21 01:13:55,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:13:55" (3/3) ... [2022-07-21 01:13:55,566 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c.v+nlh-reducer.c [2022-07-21 01:13:55,577 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:13:55,591 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 01:13:55,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:13:55,642 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@633f4e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@18842e16 [2022-07-21 01:13:55,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 01:13:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 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) [2022-07-21 01:13:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 01:13:55,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:13:55,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:13:55,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:13:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:13:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 775758574, now seen corresponding path program 1 times [2022-07-21 01:13:55,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:13:55,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264838335] [2022-07-21 01:13:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:13:55,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:13:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:13:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:13:55,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:13:55,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264838335] [2022-07-21 01:13:55,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264838335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:13:55,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:13:55,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:13:55,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344160405] [2022-07-21 01:13:55,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:13:55,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:13:55,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:13:55,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:13:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:13:55,971 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 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 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-07-21 01:13:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:13:56,044 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-07-21 01:13:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 01:13:56,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) Word has length 13 [2022-07-21 01:13:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:13:56,055 INFO L225 Difference]: With dead ends: 41 [2022-07-21 01:13:56,056 INFO L226 Difference]: Without dead ends: 22 [2022-07-21 01:13:56,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 01:13:56,061 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:13:56,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 110 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:13:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-21 01:13:56,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-21 01:13:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-07-21 01:13:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-07-21 01:13:56,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2022-07-21 01:13:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:13:56,089 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-07-21 01:13:56,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-07-21 01:13:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-07-21 01:13:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 01:13:56,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:13:56,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:13:56,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 01:13:56,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:13:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:13:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 792769235, now seen corresponding path program 1 times [2022-07-21 01:13:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:13:56,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635670845] [2022-07-21 01:13:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:13:56,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:13:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:13:56,110 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 01:13:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:13:56,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 01:13:56,146 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 01:13:56,150 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 01:13:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 01:13:56,154 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 01:13:56,157 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 01:13:56,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:13:56 BoogieIcfgContainer [2022-07-21 01:13:56,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 01:13:56,181 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 01:13:56,181 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 01:13:56,181 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 01:13:56,182 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:13:55" (3/4) ... [2022-07-21 01:13:56,184 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 01:13:56,184 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 01:13:56,185 INFO L158 Benchmark]: Toolchain (without parser) took 1387.22ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 26.9MB in the beginning and 26.8MB in the end (delta: 90.1kB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2022-07-21 01:13:56,186 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 50.3MB. Free memory is still 31.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:13:56,186 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.48ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 26.6MB in the beginning and 42.5MB in the end (delta: -15.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-21 01:13:56,187 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.56ms. Allocated memory is still 60.8MB. Free memory was 42.5MB in the beginning and 40.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:13:56,187 INFO L158 Benchmark]: Boogie Preprocessor took 49.14ms. Allocated memory is still 60.8MB. Free memory was 40.7MB in the beginning and 39.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:13:56,188 INFO L158 Benchmark]: RCFGBuilder took 363.98ms. Allocated memory is still 60.8MB. Free memory was 39.3MB in the beginning and 40.6MB in the end (delta: -1.4MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2022-07-21 01:13:56,188 INFO L158 Benchmark]: TraceAbstraction took 620.01ms. Allocated memory is still 60.8MB. Free memory was 40.0MB in the beginning and 27.0MB in the end (delta: 12.9MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2022-07-21 01:13:56,189 INFO L158 Benchmark]: Witness Printer took 3.47ms. Allocated memory is still 60.8MB. Free memory was 27.0MB in the beginning and 26.8MB in the end (delta: 257.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:13:56,191 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 50.3MB. Free memory is still 31.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 294.48ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 26.6MB in the beginning and 42.5MB in the end (delta: -15.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.56ms. Allocated memory is still 60.8MB. Free memory was 42.5MB in the beginning and 40.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.14ms. Allocated memory is still 60.8MB. Free memory was 40.7MB in the beginning and 39.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 363.98ms. Allocated memory is still 60.8MB. Free memory was 39.3MB in the beginning and 40.6MB in the end (delta: -1.4MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * TraceAbstraction took 620.01ms. Allocated memory is still 60.8MB. Free memory was 40.0MB in the beginning and 27.0MB in the end (delta: 12.9MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. * Witness Printer took 3.47ms. Allocated memory is still 60.8MB. Free memory was 27.0MB in the beginning and 26.8MB in the end (delta: 257.5kB). 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: 51]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 32, overapproximation of someBinaryDOUBLEComparisonOperation at line 38, overapproximation of to_real at line 18, overapproximation of someBinaryArithmeticFLOAToperation at line 36. Possible FailurePath: [L1] int __return_main; [L12] int __return_132; VAL [__return_132=0, __return_main=0] [L15] int main__i; [L16] float main__z; [L17] float main__t; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L20] main__t = __VERIFIER_nondet_float() [L21] int main____CPAchecker_TMP_0; [L22] EXPR main__min[0] VAL [__return_132=0, __return_main=0, main__max={5:0}, main__min={4:0}, main__min[0]=49] [L22] COND TRUE main__t >= (main__min[0]) [L24] EXPR main__max[4UL] VAL [__return_132=0, __return_main=0, main__max={5:0}, main__max[4UL]=51, main__min={4:0}] [L24] COND TRUE main__t <= (main__max[4UL]) [L26] main____CPAchecker_TMP_0 = 1 VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__max={5:0}, main__min={4:0}] [L27] COND TRUE main____CPAchecker_TMP_0 != 0 [L29] main__i = 0 VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L30] COND TRUE main__i < 5UL [L32] EXPR main__max[main__i] VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__max[main__i]=50, main__min={4:0}] [L32] COND TRUE main__t <= (main__max[main__i]) [L36] EXPR main__min[main__i] [L36] EXPR main__max[main__i] [L36] EXPR main__min[main__i] [L36] main__z = (main__t - (main__min[main__i])) / ((main__max[main__i]) - (main__min[main__i])) [L37] int main____CPAchecker_TMP_1; VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L38] COND FALSE !(main__z >= 0.0) VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__i=0, main__max={5:0}, main__min={4:0}] [L64] main____CPAchecker_TMP_1 = 0 VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L45] int __tmp_1; [L46] __tmp_1 = main____CPAchecker_TMP_1 [L47] int __VERIFIER_assert__cond; [L48] __VERIFIER_assert__cond = __tmp_1 VAL [__return_132=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L49] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_132=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] [L51] reach_error() VAL [__return_132=0, __return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__i=0, main__max={5:0}, main__min={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 41 mSDsluCounter, 110 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 73 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 37 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 20 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2022-07-21 01:13:56,232 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/float-benchs/interpolation.c.v+nlh-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 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 01:13:57,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:13:58,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:13:58,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:13:58,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:13:58,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:13:58,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:13:58,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:13:58,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:13:58,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:13:58,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:13:58,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:13:58,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:13:58,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:13:58,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:13:58,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:13:58,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:13:58,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:13:58,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:13:58,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:13:58,053 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:13:58,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:13:58,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:13:58,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:13:58,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:13:58,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:13:58,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:13:58,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:13:58,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:13:58,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:13:58,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:13:58,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:13:58,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:13:58,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:13:58,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:13:58,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:13:58,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:13:58,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:13:58,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:13:58,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:13:58,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:13:58,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:13:58,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 01:13:58,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:13:58,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:13:58,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:13:58,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:13:58,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:13:58,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:13:58,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:13:58,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:13:58,118 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:13:58,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:13:58,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:13:58,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:13:58,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:13:58,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:13:58,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:13:58,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:13:58,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 01:13:58,121 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 01:13:58,121 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 01:13:58,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:13:58,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:13:58,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:13:58,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:13:58,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:13:58,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:13:58,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:13:58,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:13:58,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:13:58,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:13:58,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:13:58,123 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 01:13:58,123 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 01:13:58,124 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:13:58,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:13:58,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:13:58,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 01:13:58,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 [2022-07-21 01:13:58,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:13:58,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:13:58,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:13:58,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:13:58,451 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:13:58,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2022-07-21 01:13:58,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60187e91/9d3a4b1e890b47dc8dbc03ca8cdc9bb3/FLAG75499217e [2022-07-21 01:13:58,947 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:13:58,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2022-07-21 01:13:58,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60187e91/9d3a4b1e890b47dc8dbc03ca8cdc9bb3/FLAG75499217e [2022-07-21 01:13:59,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60187e91/9d3a4b1e890b47dc8dbc03ca8cdc9bb3 [2022-07-21 01:13:59,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:13:59,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:13:59,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:13:59,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:13:59,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:13:59,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77eb9cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59, skipping insertion in model container [2022-07-21 01:13:59,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:13:59,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:13:59,512 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/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2022-07-21 01:13:59,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:13:59,546 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:13:59,577 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/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2022-07-21 01:13:59,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:13:59,607 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:13:59,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59 WrapperNode [2022-07-21 01:13:59,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:13:59,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:13:59,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:13:59,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:13:59,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,672 INFO L137 Inliner]: procedures = 19, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 148 [2022-07-21 01:13:59,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:13:59,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:13:59,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:13:59,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:13:59,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:13:59,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:13:59,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:13:59,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:13:59,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (1/1) ... [2022-07-21 01:13:59,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:13:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:13:59,756 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) [2022-07-21 01:13:59,782 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 [2022-07-21 01:13:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:13:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2022-07-21 01:13:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 01:13:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 01:13:59,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2022-07-21 01:13:59,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:13:59,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:13:59,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 01:13:59,886 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:13:59,888 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:14:00,558 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:14:00,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:14:00,564 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 01:14:00,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:00 BoogieIcfgContainer [2022-07-21 01:14:00,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:14:00,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:14:00,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:14:00,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:14:00,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:13:59" (1/3) ... [2022-07-21 01:14:00,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f3e50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:00, skipping insertion in model container [2022-07-21 01:14:00,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:59" (2/3) ... [2022-07-21 01:14:00,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f3e50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:00, skipping insertion in model container [2022-07-21 01:14:00,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:00" (3/3) ... [2022-07-21 01:14:00,572 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c.v+nlh-reducer.c [2022-07-21 01:14:00,585 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:14:00,585 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 01:14:00,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:14:00,643 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f8525d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5b2cf6b [2022-07-21 01:14:00,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 01:14:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 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) [2022-07-21 01:14:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 01:14:00,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:14:00,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:14:00,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:14:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:14:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash 775758574, now seen corresponding path program 1 times [2022-07-21 01:14:00,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:14:00,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40508314] [2022-07-21 01:14:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:14:00,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:14:00,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:14:00,683 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) [2022-07-21 01:14:00,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 01:14:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:14:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 01:14:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:14:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:14:01,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:14:01,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:14:01,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40508314] [2022-07-21 01:14:01,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40508314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:14:01,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:14:01,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:14:01,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987839990] [2022-07-21 01:14:01,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:14:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:14:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:14:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:14:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:14:01,113 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 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 3.25) internal successors, (13), 4 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) [2022-07-21 01:14:03,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 01:14:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:14:03,158 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-07-21 01:14:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:14:03,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) Word has length 13 [2022-07-21 01:14:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:14:03,168 INFO L225 Difference]: With dead ends: 35 [2022-07-21 01:14:03,168 INFO L226 Difference]: Without dead ends: 22 [2022-07-21 01:14:03,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:14:03,173 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:14:03,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 102 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-21 01:14:03,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-21 01:14:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-21 01:14:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-07-21 01:14:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-07-21 01:14:03,197 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2022-07-21 01:14:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:14:03,197 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-07-21 01:14:03,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-07-21 01:14:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-07-21 01:14:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 01:14:03,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:14:03,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:14:03,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 01:14:03,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:14:03,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:14:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:14:03,408 INFO L85 PathProgramCache]: Analyzing trace with hash 792769235, now seen corresponding path program 1 times [2022-07-21 01:14:03,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:14:03,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994975471] [2022-07-21 01:14:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:14:03,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:14:03,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:14:03,411 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) [2022-07-21 01:14:03,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 01:14:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:14:03,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 01:14:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:14:05,682 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 01:14:05,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 86 [2022-07-21 01:14:40,022 WARN L233 SmtUtils]: Spent 13.87s on a formula simplification. DAG size of input: 39 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 01:15:02,226 WARN L833 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub roundNearestTiesToEven .cse1 .cse0))) (_ +zero 11 53))) (= .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1)))) is different from false [2022-07-21 01:15:04,255 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub roundNearestTiesToEven .cse1 .cse0))) (_ +zero 11 53))) (= .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1)))) is different from true [2022-07-21 01:15:43,491 WARN L833 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub roundNearestTiesToEven .cse1 .cse0))) (_ +zero 11 53))) (= .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1)))) is different from false [2022-07-21 01:15:45,520 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (not (fp.geq ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.sub roundNearestTiesToEven .cse1 .cse0))) (_ +zero 11 53))) (= .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse0) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1)))) is different from true [2022-07-21 01:16:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:16:02,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:16:02,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:16:02,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994975471] [2022-07-21 01:16:02,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994975471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:16:02,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:16:02,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 01:16:02,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7326528] [2022-07-21 01:16:02,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:16:02,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 01:16:02,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:16:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 01:16:02,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=58, Unknown=7, NotChecked=34, Total=132 [2022-07-21 01:16:02,422 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2022-07-21 01:16:04,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 01:16:06,345 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#main__max~0#1.base|)) (.cse3 (let ((.cse7 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#main__min~0#1.base|) |c_ULTIMATE.start_main_~#main__min~0#1.offset|))) (fp ((_ extract 31 31) .cse7) ((_ extract 30 23) .cse7) ((_ extract 22 0) .cse7))))) (and (= |c_ULTIMATE.start_main_~#main__min~0#1.offset| (_ bv0 32)) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv300 32)) (let ((.cse0 (select .cse1 (bvadd |c_ULTIMATE.start_main_~#main__max~0#1.offset| (_ bv16 32))))) (fp ((_ extract 31 31) .cse0) ((_ extract 30 23) .cse0) ((_ extract 22 0) .cse0)))) (= |c_ULTIMATE.start_main_~#main__max~0#1.offset| (_ bv0 32)) (fp.leq |c_ULTIMATE.start_main_~main__t~0#1| (let ((.cse2 (select .cse1 (bvadd |c_ULTIMATE.start_main_~#main__max~0#1.offset| (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~main__i~0#1|))))) (fp ((_ extract 31 31) .cse2) ((_ extract 30 23) .cse2) ((_ extract 22 0) .cse2)))) (fp.geq |c_ULTIMATE.start_main_~main__t~0#1| .cse3) (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse4 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3))) (.cse5 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1)))) (and (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32)) .cse4) (= .cse5 ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32))) (= (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |ULTIMATE.start_main_~main__t~0#1| .cse5) (fp.sub c_currentRoundingMode .cse4 .cse5)) |c_ULTIMATE.start_main_~main__z~0#1|) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse4) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse5)))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32)) (let ((.cse6 (select .cse1 |c_ULTIMATE.start_main_~#main__max~0#1.offset|))) (fp ((_ extract 31 31) .cse6) ((_ extract 30 23) .cse6) ((_ extract 22 0) .cse6)))) (= |c_ULTIMATE.start_main_~main__i~0#1| (_ bv0 32)) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32)) .cse3) (= c_currentRoundingMode roundNearestTiesToEven))) is different from false [2022-07-21 01:16:08,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 01:16:10,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 01:16:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:16:11,379 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-07-21 01:16:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 01:16:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) Word has length 13 [2022-07-21 01:16:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:16:11,381 INFO L225 Difference]: With dead ends: 31 [2022-07-21 01:16:11,381 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 01:16:11,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=35, Invalid=59, Unknown=8, NotChecked=54, Total=156 [2022-07-21 01:16:11,382 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-21 01:16:11,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 2 Unknown, 76 Unchecked, 6.8s Time] [2022-07-21 01:16:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 01:16:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-07-21 01:16:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2022-07-21 01:16:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-21 01:16:11,386 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 13 [2022-07-21 01:16:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:16:11,387 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-21 01:16:11,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2022-07-21 01:16:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-21 01:16:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 01:16:11,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:16:11,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:16:11,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 01:16:11,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:16:11,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:16:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:16:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1710804433, now seen corresponding path program 1 times [2022-07-21 01:16:11,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:16:11,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018213957] [2022-07-21 01:16:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:16:11,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:16:11,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:16:11,594 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) [2022-07-21 01:16:11,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 01:16:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:16:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 01:16:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:16:14,309 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 01:16:14,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 86 [2022-07-21 01:16:50,477 WARN L233 SmtUtils]: Spent 15.27s on a formula simplification. DAG size of input: 39 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 01:17:05,454 WARN L833 $PredicateComparison]: unable to prove that (and (fp.geq ((_ to_fp 11 53) c_currentRoundingMode |c_ULTIMATE.start_main_~main__z~0#1|) (_ +zero 11 53)) (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse1 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (and (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv10 32)) .cse0) (= |c_ULTIMATE.start_main_~main__z~0#1| (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |ULTIMATE.start_main_~main__t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse0 .cse1))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ bv5 32)) .cse1) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse0) (fp.geq |ULTIMATE.start_main_~main__t~0#1| .cse1)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-07-21 01:17:31,559 WARN L833 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse1 .cse2))))) (and (fp.geq .cse0 (_ +zero 11 53)) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1) (not (fp.leq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32)) .cse2) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1))))) is different from false [2022-07-21 01:17:33,592 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~main__t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_6 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_6) ((_ extract 30 23) v_arrayElimCell_6) ((_ extract 22 0) v_arrayElimCell_6))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~main__t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse1 .cse2))))) (and (fp.geq .cse0 (_ +zero 11 53)) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse1) (not (fp.leq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32)) .cse2) (fp.leq |ULTIMATE.start_main_~main__t~0#1| .cse1))))) is different from true [2022-07-21 01:18:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:18:40,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:18:40,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:18:40,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018213957] [2022-07-21 01:18:40,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018213957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:18:40,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:18:40,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 01:18:40,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491578959] [2022-07-21 01:18:40,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:18:40,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 01:18:40,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:18:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 01:18:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=62, Unknown=3, NotChecked=34, Total=132 [2022-07-21 01:18:40,674 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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)