./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.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 c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 14:22:10,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 14:22:10,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 14:22:10,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 14:22:10,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 14:22:10,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 14:22:10,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 14:22:10,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 14:22:10,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 14:22:10,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 14:22:10,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 14:22:10,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 14:22:10,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 14:22:10,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 14:22:10,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 14:22:10,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 14:22:10,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 14:22:10,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 14:22:10,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 14:22:10,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 14:22:10,509 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 14:22:10,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 14:22:10,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 14:22:10,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 14:22:10,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 14:22:10,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 14:22:10,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 14:22:10,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 14:22:10,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 14:22:10,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 14:22:10,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 14:22:10,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 14:22:10,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 14:22:10,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 14:22:10,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 14:22:10,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 14:22:10,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 14:22:10,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 14:22:10,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 14:22:10,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 14:22:10,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 14:22:10,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 14:22:10,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 14:22:10,572 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 14:22:10,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 14:22:10,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 14:22:10,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 14:22:10,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 14:22:10,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 14:22:10,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 14:22:10,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 14:22:10,577 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 14:22:10,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 14:22:10,578 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 14:22:10,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 14:22:10,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 14:22:10,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 14:22:10,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 14:22:10,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 14:22:10,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 14:22:10,580 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 14:22:10,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 14:22:10,581 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 14:22:10,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 14:22:10,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 14:22:10,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 14:22:10,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 14:22:10,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:22:10,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 14:22:10,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 14:22:10,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 14:22:10,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 14:22:10,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 14:22:10,584 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 14:22:10,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 14:22:10,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 14:22:10,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2022-07-19 14:22:10,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 14:22:10,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 14:22:10,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 14:22:10,819 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 14:22:10,823 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 14:22:10,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2022-07-19 14:22:10,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf0c63ac2/9e156274353f4574b6598d63ebffdbb7/FLAG988d31f98 [2022-07-19 14:22:11,322 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 14:22:11,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2022-07-19 14:22:11,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf0c63ac2/9e156274353f4574b6598d63ebffdbb7/FLAG988d31f98 [2022-07-19 14:22:11,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf0c63ac2/9e156274353f4574b6598d63ebffdbb7 [2022-07-19 14:22:11,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 14:22:11,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 14:22:11,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 14:22:11,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 14:22:11,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 14:22:11,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:11,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4561b089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11, skipping insertion in model container [2022-07-19 14:22:11,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:11,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 14:22:11,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 14:22:11,937 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-newlib/float_req_bl_1252b.c[1936,1949] [2022-07-19 14:22:11,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:22:11,948 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 14:22:11,980 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-newlib/float_req_bl_1252b.c[1936,1949] [2022-07-19 14:22:11,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:22:11,997 INFO L208 MainTranslator]: Completed translation [2022-07-19 14:22:11,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11 WrapperNode [2022-07-19 14:22:11,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 14:22:11,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 14:22:11,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 14:22:11,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 14:22:12,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,042 INFO L137 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2022-07-19 14:22:12,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 14:22:12,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 14:22:12,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 14:22:12,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 14:22:12,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 14:22:12,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 14:22:12,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 14:22:12,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 14:22:12,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (1/1) ... [2022-07-19 14:22:12,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:22:12,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:22:12,121 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) [2022-07-19 14:22:12,129 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 [2022-07-19 14:22:12,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 14:22:12,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 14:22:12,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 14:22:12,153 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-07-19 14:22:12,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-07-19 14:22:12,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-07-19 14:22:12,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 14:22:12,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 14:22:12,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 14:22:12,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 14:22:12,216 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 14:22:12,218 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 14:22:12,441 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 14:22:12,446 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 14:22:12,447 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 14:22:12,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:22:12 BoogieIcfgContainer [2022-07-19 14:22:12,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 14:22:12,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 14:22:12,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 14:22:12,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 14:22:12,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:22:11" (1/3) ... [2022-07-19 14:22:12,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da3d4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:22:12, skipping insertion in model container [2022-07-19 14:22:12,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:11" (2/3) ... [2022-07-19 14:22:12,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da3d4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:22:12, skipping insertion in model container [2022-07-19 14:22:12,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:22:12" (3/3) ... [2022-07-19 14:22:12,456 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2022-07-19 14:22:12,468 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 14:22:12,469 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 14:22:12,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 14:22:12,557 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@546cd93e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@22599b89 [2022-07-19 14:22:12,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 14:22:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 14:22:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 14:22:12,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:12,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:12,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:12,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1376173917, now seen corresponding path program 1 times [2022-07-19 14:22:12,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:22:12,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900099436] [2022-07-19 14:22:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:12,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:22:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:12,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 14:22:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:12,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:22:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900099436] [2022-07-19 14:22:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900099436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:12,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:12,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:22:12,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784351311] [2022-07-19 14:22:12,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:12,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:22:12,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:22:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:22:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:22:12,840 INFO L87 Difference]: Start difference. First operand has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:12,898 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2022-07-19 14:22:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:22:12,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-19 14:22:12,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:12,913 INFO L225 Difference]: With dead ends: 59 [2022-07-19 14:22:12,913 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 14:22:12,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:22:12,921 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:12,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 14:22:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-19 14:22:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 14:22:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-07-19 14:22:12,975 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 14 [2022-07-19 14:22:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:12,976 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-07-19 14:22:12,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-07-19 14:22:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 14:22:12,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:12,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:12,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 14:22:12,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1160673575, now seen corresponding path program 1 times [2022-07-19 14:22:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:22:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542857990] [2022-07-19 14:22:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:12,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:22:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:13,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 14:22:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:13,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:22:13,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542857990] [2022-07-19 14:22:13,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542857990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:13,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:13,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 14:22:13,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063082308] [2022-07-19 14:22:13,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:13,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 14:22:13,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:22:13,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 14:22:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:22:13,169 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:13,216 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-07-19 14:22:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 14:22:13,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-19 14:22:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:13,220 INFO L225 Difference]: With dead ends: 41 [2022-07-19 14:22:13,221 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 14:22:13,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:22:13,226 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:13,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 118 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 14:22:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-19 14:22:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 14:22:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-19 14:22:13,244 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 15 [2022-07-19 14:22:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:13,246 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-19 14:22:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-19 14:22:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 14:22:13,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:13,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:13,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 14:22:13,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:13,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1319120806, now seen corresponding path program 1 times [2022-07-19 14:22:13,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:22:13,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236080279] [2022-07-19 14:22:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:22:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 14:22:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:13,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:22:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236080279] [2022-07-19 14:22:13,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236080279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:13,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:13,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 14:22:13,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891474890] [2022-07-19 14:22:13,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:13,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 14:22:13,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:22:13,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 14:22:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:22:13,351 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:13,388 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-19 14:22:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 14:22:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-19 14:22:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:13,390 INFO L225 Difference]: With dead ends: 45 [2022-07-19 14:22:13,390 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 14:22:13,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:22:13,396 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:13,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 14:22:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-19 14:22:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 14:22:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-19 14:22:13,406 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 16 [2022-07-19 14:22:13,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:13,406 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-19 14:22:13,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:13,407 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-19 14:22:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 14:22:13,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:13,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:13,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 14:22:13,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2051515267, now seen corresponding path program 1 times [2022-07-19 14:22:13,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:22:13,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631857439] [2022-07-19 14:22:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:13,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:22:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:13,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 14:22:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:13,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:22:13,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631857439] [2022-07-19 14:22:13,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631857439] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:13,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:13,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 14:22:13,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621739803] [2022-07-19 14:22:13,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:13,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 14:22:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:22:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 14:22:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:22:13,511 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:13,543 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-19 14:22:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 14:22:13,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-19 14:22:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:13,545 INFO L225 Difference]: With dead ends: 45 [2022-07-19 14:22:13,545 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 14:22:13,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:22:13,546 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:13,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 14:22:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-19 14:22:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 14:22:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-19 14:22:13,553 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-19 14:22:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:13,553 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-19 14:22:13,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-19 14:22:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 14:22:13,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:13,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:13,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 14:22:13,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2101901686, now seen corresponding path program 1 times [2022-07-19 14:22:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:22:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357386409] [2022-07-19 14:22:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:13,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:22:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:13,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 14:22:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:13,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:22:13,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357386409] [2022-07-19 14:22:13,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357386409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:13,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:13,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 14:22:13,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598497220] [2022-07-19 14:22:13,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:13,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 14:22:13,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:22:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 14:22:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:22:13,685 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:13,733 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-19 14:22:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 14:22:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-19 14:22:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:13,736 INFO L225 Difference]: With dead ends: 45 [2022-07-19 14:22:13,736 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 14:22:13,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:22:13,738 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:13,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 14:22:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-19 14:22:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 14:22:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-19 14:22:13,754 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 18 [2022-07-19 14:22:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:13,754 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-19 14:22:13,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-19 14:22:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 14:22:13,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:13,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:13,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 14:22:13,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash 385611147, now seen corresponding path program 1 times [2022-07-19 14:22:13,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:22:13,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61276933] [2022-07-19 14:22:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:13,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:22:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 14:22:13,786 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 14:22:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 14:22:13,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 14:22:13,827 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 14:22:13,828 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 14:22:13,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 14:22:13,833 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 14:22:13,836 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 14:22:13,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 02:22:13 BoogieIcfgContainer [2022-07-19 14:22:13,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 14:22:13,865 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 14:22:13,866 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 14:22:13,866 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 14:22:13,866 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:22:12" (3/4) ... [2022-07-19 14:22:13,869 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-19 14:22:13,869 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 14:22:13,870 INFO L158 Benchmark]: Toolchain (without parser) took 2150.54ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 64.6MB in the beginning and 85.8MB in the end (delta: -21.2MB). Peak memory consumption was 994.2kB. Max. memory is 16.1GB. [2022-07-19 14:22:13,870 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 96.5MB. Free memory is still 50.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 14:22:13,870 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.16ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 64.4MB in the beginning and 95.7MB in the end (delta: -31.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 14:22:13,872 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.25ms. Allocated memory is still 121.6MB. Free memory was 95.7MB in the beginning and 94.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 14:22:13,872 INFO L158 Benchmark]: Boogie Preprocessor took 44.09ms. Allocated memory is still 121.6MB. Free memory was 94.0MB in the beginning and 92.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 14:22:13,873 INFO L158 Benchmark]: RCFGBuilder took 360.37ms. Allocated memory is still 121.6MB. Free memory was 92.7MB in the beginning and 81.4MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 14:22:13,873 INFO L158 Benchmark]: TraceAbstraction took 1414.49ms. Allocated memory is still 121.6MB. Free memory was 80.6MB in the beginning and 86.8MB in the end (delta: -6.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 14:22:13,873 INFO L158 Benchmark]: Witness Printer took 3.63ms. Allocated memory is still 121.6MB. Free memory was 86.8MB in the beginning and 85.8MB in the end (delta: 981.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 14:22:13,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 96.5MB. Free memory is still 50.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.16ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 64.4MB in the beginning and 95.7MB in the end (delta: -31.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.25ms. Allocated memory is still 121.6MB. Free memory was 95.7MB in the beginning and 94.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.09ms. Allocated memory is still 121.6MB. Free memory was 94.0MB in the beginning and 92.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 360.37ms. Allocated memory is still 121.6MB. Free memory was 92.7MB in the beginning and 81.4MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1414.49ms. Allocated memory is still 121.6MB. Free memory was 80.6MB in the beginning and 86.8MB in the end (delta: -6.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.63ms. Allocated memory is still 121.6MB. Free memory was 86.8MB in the beginning and 85.8MB in the end (delta: 981.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: 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 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L77] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=0] [L23] __uint32_t w; VAL [\old(x)=0, x=0] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=0, w=4286578689, x=0] [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=0, w=4286578689, x=0] [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=0, w=4286578689, x=0] [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; VAL [\old(x)=0, \result=0, w=4286578689, x=0] [L46] RET, EXPR __fpclassify_float(x) VAL [\old(x)=0, \old(y)=4286578690, __fpclassify_float(x)=0, x=0, y=4286578690] [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; VAL [\old(x)=0, \old(y)=4286578690, \result=4286578690, x=0, y=4286578690] [L77] RET, EXPR fmax_float(x, y) [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=4286578690, res == 0.0f && __signbit_float(res) == 0=0, x=0, y=4286578690] [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() VAL [res=4286578690, x=0, y=4286578690] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 591 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 406 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 95 IncrementalHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 185 mSDtfsCounter, 95 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 203 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-19 14:22:13,919 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-newlib/float_req_bl_1252b.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 c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 14:22:15,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 14:22:15,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 14:22:15,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 14:22:15,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 14:22:15,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 14:22:15,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 14:22:15,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 14:22:15,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 14:22:15,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 14:22:15,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 14:22:15,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 14:22:15,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 14:22:15,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 14:22:15,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 14:22:15,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 14:22:15,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 14:22:15,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 14:22:15,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 14:22:15,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 14:22:15,913 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 14:22:15,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 14:22:15,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 14:22:15,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 14:22:15,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 14:22:15,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 14:22:15,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 14:22:15,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 14:22:15,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 14:22:15,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 14:22:15,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 14:22:15,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 14:22:15,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 14:22:15,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 14:22:15,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 14:22:15,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 14:22:15,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 14:22:15,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 14:22:15,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 14:22:15,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 14:22:15,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 14:22:15,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 14:22:15,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-19 14:22:15,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 14:22:15,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 14:22:15,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 14:22:15,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 14:22:15,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 14:22:15,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 14:22:15,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 14:22:15,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 14:22:15,989 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 14:22:15,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 14:22:15,991 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 14:22:15,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 14:22:15,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 14:22:15,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 14:22:15,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 14:22:15,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 14:22:15,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-19 14:22:15,992 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-19 14:22:15,992 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-19 14:22:15,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 14:22:15,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 14:22:15,993 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 14:22:15,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 14:22:15,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 14:22:15,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 14:22:15,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 14:22:15,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:22:15,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 14:22:15,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 14:22:15,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 14:22:15,995 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-19 14:22:15,995 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-19 14:22:15,995 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 14:22:15,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 14:22:15,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 14:22:15,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-19 14:22:15,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2022-07-19 14:22:16,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 14:22:16,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 14:22:16,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 14:22:16,330 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 14:22:16,331 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 14:22:16,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2022-07-19 14:22:16,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/525b9f288/bab6dabfd061474882e7b0e827a0c0e1/FLAG6844b1a20 [2022-07-19 14:22:16,852 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 14:22:16,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2022-07-19 14:22:16,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/525b9f288/bab6dabfd061474882e7b0e827a0c0e1/FLAG6844b1a20 [2022-07-19 14:22:17,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/525b9f288/bab6dabfd061474882e7b0e827a0c0e1 [2022-07-19 14:22:17,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 14:22:17,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 14:22:17,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 14:22:17,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 14:22:17,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 14:22:17,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d3c9bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17, skipping insertion in model container [2022-07-19 14:22:17,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 14:22:17,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 14:22:17,418 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-newlib/float_req_bl_1252b.c[1936,1949] [2022-07-19 14:22:17,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:22:17,434 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 14:22:17,451 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-newlib/float_req_bl_1252b.c[1936,1949] [2022-07-19 14:22:17,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:22:17,465 INFO L208 MainTranslator]: Completed translation [2022-07-19 14:22:17,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17 WrapperNode [2022-07-19 14:22:17,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 14:22:17,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 14:22:17,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 14:22:17,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 14:22:17,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,502 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-07-19 14:22:17,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 14:22:17,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 14:22:17,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 14:22:17,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 14:22:17,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 14:22:17,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 14:22:17,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 14:22:17,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 14:22:17,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (1/1) ... [2022-07-19 14:22:17,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:22:17,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:22:17,562 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) [2022-07-19 14:22:17,584 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 [2022-07-19 14:22:17,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 14:22:17,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-19 14:22:17,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 14:22:17,598 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-07-19 14:22:17,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-07-19 14:22:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-19 14:22:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 14:22:17,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 14:22:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2022-07-19 14:22:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 14:22:17,670 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 14:22:17,671 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 14:22:17,931 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 14:22:17,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 14:22:17,941 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 14:22:17,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:22:17 BoogieIcfgContainer [2022-07-19 14:22:17,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 14:22:17,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 14:22:17,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 14:22:17,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 14:22:17,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:22:17" (1/3) ... [2022-07-19 14:22:17,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2238f8ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:22:17, skipping insertion in model container [2022-07-19 14:22:17,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:22:17" (2/3) ... [2022-07-19 14:22:17,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2238f8ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:22:17, skipping insertion in model container [2022-07-19 14:22:17,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:22:17" (3/3) ... [2022-07-19 14:22:17,966 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2022-07-19 14:22:17,978 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 14:22:17,990 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 14:22:18,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 14:22:18,078 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@4fd03569, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7bc75be1 [2022-07-19 14:22:18,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 14:22:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 14:22:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 14:22:18,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:18,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:18,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1826258672, now seen corresponding path program 1 times [2022-07-19 14:22:18,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:18,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478748718] [2022-07-19 14:22:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:18,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:18,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:18,115 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) [2022-07-19 14:22:18,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-19 14:22:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 14:22:18,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:18,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:18,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:18,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478748718] [2022-07-19 14:22:18,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478748718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:18,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:18,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 14:22:18,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654953365] [2022-07-19 14:22:18,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:18,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 14:22:18,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 14:22:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:22:18,283 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:18,301 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2022-07-19 14:22:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 14:22:18,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-19 14:22:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:18,309 INFO L225 Difference]: With dead ends: 55 [2022-07-19 14:22:18,309 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 14:22:18,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:22:18,315 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:18,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 14:22:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-19 14:22:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 14:22:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-07-19 14:22:18,348 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2022-07-19 14:22:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:18,349 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-07-19 14:22:18,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-07-19 14:22:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 14:22:18,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:18,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:18,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:18,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:18,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash -503165124, now seen corresponding path program 1 times [2022-07-19 14:22:18,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:18,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634485044] [2022-07-19 14:22:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:18,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:18,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:18,578 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) [2022-07-19 14:22:18,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-19 14:22:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:18,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 14:22:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:18,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:18,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:18,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634485044] [2022-07-19 14:22:18,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634485044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:18,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:18,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 14:22:18,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046870151] [2022-07-19 14:22:18,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 14:22:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 14:22:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 14:22:18,710 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:18,756 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-07-19 14:22:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 14:22:18,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-19 14:22:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:18,759 INFO L225 Difference]: With dead ends: 38 [2022-07-19 14:22:18,760 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 14:22:18,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 14:22:18,761 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:18,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 14:22:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 14:22:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 14:22:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-19 14:22:18,769 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-19 14:22:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:18,769 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-19 14:22:18,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-19 14:22:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 14:22:18,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:18,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:18,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:18,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:18,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:18,980 INFO L85 PathProgramCache]: Analyzing trace with hash 25086925, now seen corresponding path program 1 times [2022-07-19 14:22:18,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:18,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223387173] [2022-07-19 14:22:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:18,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:18,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:18,983 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) [2022-07-19 14:22:18,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-19 14:22:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:19,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 14:22:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:19,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:19,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223387173] [2022-07-19 14:22:19,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223387173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:19,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:19,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 14:22:19,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587984071] [2022-07-19 14:22:19,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:19,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 14:22:19,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 14:22:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:22:19,176 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:19,266 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2022-07-19 14:22:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 14:22:19,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-19 14:22:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:19,268 INFO L225 Difference]: With dead ends: 68 [2022-07-19 14:22:19,268 INFO L226 Difference]: Without dead ends: 43 [2022-07-19 14:22:19,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:22:19,270 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:19,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 106 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-07-19 14:22:19,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-19 14:22:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2022-07-19 14:22:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 14:22:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-19 14:22:19,279 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 15 [2022-07-19 14:22:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:19,280 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-19 14:22:19,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-19 14:22:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 14:22:19,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:19,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:19,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:19,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:19,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:19,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1897305304, now seen corresponding path program 1 times [2022-07-19 14:22:19,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:19,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941620689] [2022-07-19 14:22:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:19,495 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:19,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 14:22:19,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-19 14:22:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 14:22:19,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:22:19,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:19,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941620689] [2022-07-19 14:22:19,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941620689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:19,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:19,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 14:22:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453769423] [2022-07-19 14:22:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:19,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 14:22:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:19,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 14:22:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:22:19,659 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:19,737 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-19 14:22:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 14:22:19,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-19 14:22:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:19,738 INFO L225 Difference]: With dead ends: 57 [2022-07-19 14:22:19,738 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 14:22:19,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:22:19,740 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:19,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 87 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-07-19 14:22:19,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 14:22:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-19 14:22:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 14:22:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-19 14:22:19,745 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 16 [2022-07-19 14:22:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:19,746 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-19 14:22:19,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 14:22:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-19 14:22:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 14:22:19,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:19,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:19,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:19,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:19,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash -538621340, now seen corresponding path program 1 times [2022-07-19 14:22:19,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:19,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462092036] [2022-07-19 14:22:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:19,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:19,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:19,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 14:22:19,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-19 14:22:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 14:22:20,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 14:22:20,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:20,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:20,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462092036] [2022-07-19 14:22:20,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462092036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:20,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:20,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 14:22:20,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873795389] [2022-07-19 14:22:20,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:20,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 14:22:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 14:22:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 14:22:20,035 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:20,063 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-07-19 14:22:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 14:22:20,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-19 14:22:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:20,064 INFO L225 Difference]: With dead ends: 38 [2022-07-19 14:22:20,065 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 14:22:20,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 14:22:20,066 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:20,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 14:22:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 14:22:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 14:22:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-19 14:22:20,070 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 22 [2022-07-19 14:22:20,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:20,071 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-19 14:22:20,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:20,071 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-19 14:22:20,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 14:22:20,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:20,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:20,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-19 14:22:20,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:20,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1336928685, now seen corresponding path program 1 times [2022-07-19 14:22:20,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:20,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606642329] [2022-07-19 14:22:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:20,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:20,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:20,288 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 14:22:20,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-19 14:22:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:20,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 14:22:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:22:20,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:20,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:20,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606642329] [2022-07-19 14:22:20,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606642329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:20,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:20,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 14:22:20,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932444697] [2022-07-19 14:22:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:20,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 14:22:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 14:22:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:22:20,422 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:20,501 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-07-19 14:22:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 14:22:20,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-19 14:22:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:20,505 INFO L225 Difference]: With dead ends: 43 [2022-07-19 14:22:20,505 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 14:22:20,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:22:20,507 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:20,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 92 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-07-19 14:22:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 14:22:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 14:22:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 14:22:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-19 14:22:20,511 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 23 [2022-07-19 14:22:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:20,512 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-19 14:22:20,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:20,512 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-19 14:22:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 14:22:20,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:20,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:20,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:20,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash -636835510, now seen corresponding path program 1 times [2022-07-19 14:22:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:20,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847189472] [2022-07-19 14:22:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:20,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:20,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:20,722 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 14:22:20,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-19 14:22:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:20,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 14:22:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 14:22:20,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:20,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:20,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847189472] [2022-07-19 14:22:20,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847189472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:20,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:20,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:22:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183199996] [2022-07-19 14:22:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:22:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:22:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:22:20,816 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:20,825 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-19 14:22:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:22:20,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-19 14:22:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:20,826 INFO L225 Difference]: With dead ends: 39 [2022-07-19 14:22:20,827 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 14:22:20,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:22:20,828 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:20,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 14:22:20,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 14:22:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 14:22:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-19 14:22:20,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 24 [2022-07-19 14:22:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:20,832 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-19 14:22:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-19 14:22:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 14:22:20,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:20,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:20,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:21,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:21,044 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash -579577208, now seen corresponding path program 1 times [2022-07-19 14:22:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:21,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098638269] [2022-07-19 14:22:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:21,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:21,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 14:22:21,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-19 14:22:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:21,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 14:22:21,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 14:22:21,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:21,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098638269] [2022-07-19 14:22:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098638269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:21,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:21,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 14:22:21,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999031061] [2022-07-19 14:22:21,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:21,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 14:22:21,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:21,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 14:22:21,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:22:21,166 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:21,236 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-07-19 14:22:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 14:22:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-19 14:22:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:21,238 INFO L225 Difference]: With dead ends: 41 [2022-07-19 14:22:21,238 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 14:22:21,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-19 14:22:21,239 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:21,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 109 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:22:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 14:22:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-07-19 14:22:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 14:22:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-19 14:22:21,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 24 [2022-07-19 14:22:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:21,246 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-19 14:22:21,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-19 14:22:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 14:22:21,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:21,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:21,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:21,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:21,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:21,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2025711360, now seen corresponding path program 1 times [2022-07-19 14:22:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:21,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029873545] [2022-07-19 14:22:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:21,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:21,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:21,450 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 14:22:21,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-19 14:22:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:22:21,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 14:22:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:22:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:22:21,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:22:21,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 14:22:21,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029873545] [2022-07-19 14:22:21,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029873545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:22:21,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:22:21,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 14:22:21,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804492919] [2022-07-19 14:22:21,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:22:21,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 14:22:21,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 14:22:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 14:22:21,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:22:21,612 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:22:21,718 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-19 14:22:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 14:22:21,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-19 14:22:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:22:21,720 INFO L225 Difference]: With dead ends: 42 [2022-07-19 14:22:21,720 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 14:22:21,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:22:21,721 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:22:21,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-19 14:22:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 14:22:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 14:22:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 14:22:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-07-19 14:22:21,724 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 24 [2022-07-19 14:22:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:22:21,725 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-07-19 14:22:21,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 14:22:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-07-19 14:22:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 14:22:21,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:22:21,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:21,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:21,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:21,938 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:22:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:22:21,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1580504541, now seen corresponding path program 1 times [2022-07-19 14:22:21,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 14:22:21,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832125004] [2022-07-19 14:22:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:22:21,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 14:22:21,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 14:22:21,941 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 14:22:21,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-19 14:22:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 14:22:22,011 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 14:22:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 14:22:22,080 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-19 14:22:22,081 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 14:22:22,082 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 14:22:22,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-19 14:22:22,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 14:22:22,286 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:22:22,289 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 14:22:22,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 02:22:22 BoogieIcfgContainer [2022-07-19 14:22:22,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 14:22:22,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 14:22:22,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 14:22:22,327 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 14:22:22,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:22:17" (3/4) ... [2022-07-19 14:22:22,329 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 14:22:22,369 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 14:22:22,370 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 14:22:22,370 INFO L158 Benchmark]: Toolchain (without parser) took 5107.54ms. Allocated memory was 50.3MB in the beginning and 81.8MB in the end (delta: 31.5MB). Free memory was 28.1MB in the beginning and 57.2MB in the end (delta: -29.1MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2022-07-19 14:22:22,370 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 50.3MB. Free memory is still 31.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 14:22:22,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.31ms. Allocated memory is still 50.3MB. Free memory was 27.8MB in the beginning and 28.3MB in the end (delta: -443.1kB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-19 14:22:22,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.15ms. Allocated memory is still 50.3MB. Free memory was 28.1MB in the beginning and 26.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 14:22:22,371 INFO L158 Benchmark]: Boogie Preprocessor took 26.62ms. Allocated memory is still 50.3MB. Free memory was 26.5MB in the beginning and 25.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 14:22:22,372 INFO L158 Benchmark]: RCFGBuilder took 429.62ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.0MB in the beginning and 42.9MB in the end (delta: -17.9MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. [2022-07-19 14:22:22,372 INFO L158 Benchmark]: TraceAbstraction took 4364.84ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 42.2MB in the beginning and 59.9MB in the end (delta: -17.6MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2022-07-19 14:22:22,372 INFO L158 Benchmark]: Witness Printer took 42.65ms. Allocated memory is still 81.8MB. Free memory was 59.9MB in the beginning and 57.2MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-19 14:22:22,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 50.3MB. Free memory is still 31.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.31ms. Allocated memory is still 50.3MB. Free memory was 27.8MB in the beginning and 28.3MB in the end (delta: -443.1kB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.15ms. Allocated memory is still 50.3MB. Free memory was 28.1MB in the beginning and 26.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.62ms. Allocated memory is still 50.3MB. Free memory was 26.5MB in the beginning and 25.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 429.62ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.0MB in the beginning and 42.9MB in the end (delta: -17.9MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. * TraceAbstraction took 4364.84ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 42.2MB in the beginning and 59.9MB in the end (delta: -17.6MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. * Witness Printer took 42.65ms. Allocated memory is still 81.8MB. Free memory was 59.9MB in the beginning and 57.2MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 81]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L77] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=0.0] [L23] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; VAL [\old(x)=0.0, \result=2, w=0, x=0.0] [L46] RET, EXPR __fpclassify_float(x) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_float(x)=2, x=0.0, y=0.0] [L46] COND FALSE !(__fpclassify_float(x) == 0) [L50] CALL, EXPR __fpclassify_float(y) VAL [\old(x)=0.0] [L23] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; VAL [\old(x)=0.0, \result=2, w=2147483648, x=0.0] [L50] RET, EXPR __fpclassify_float(y) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_float(y)=2, x=0.0, y=0.0] [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y VAL [\old(x)=0.0, \old(y)=0.0, x=0.0, x > y ? x : y=0.0, y=0.0] [L53] return x > y ? x : y; [L77] RET, EXPR fmax_float(x, y) [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] CALL, EXPR __signbit_float(res) [L57] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; VAL [\old(x)=0.0, \result=1, w=2147483648, x=0.0] [L80] RET, EXPR __signbit_float(res) [L80] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [__signbit_float(res)=1, res=0.0, res == 0.0f && __signbit_float(res) == 0=0, x=0.0, y=0.0] [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() VAL [res=0.0, x=0.0, y=0.0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 150 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 729 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 54 IncrementalHoareTripleChecker+Unchecked, 474 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 159 IncrementalHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 255 mSDtfsCounter, 159 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=3, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 203 NumberOfCodeBlocks, 203 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 166 ConstructedInterpolants, 14 QuantifiedInterpolants, 524 SizeOfPredicates, 35 NumberOfNonLiveVariables, 611 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 30/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-19 14:22:22,403 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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE