./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/combinations/square_8+soft_float_4-2a.c.cil.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 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:07:13,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:07:13,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:07:13,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:07:13,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:07:13,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:07:13,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:07:13,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:07:13,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:07:13,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:07:13,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:07:13,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:07:13,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:07:13,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:07:13,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:07:13,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:07:13,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:07:13,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:07:13,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:07:13,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:07:13,876 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:07:13,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:07:13,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:07:13,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:07:13,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:07:13,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:07:13,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:07:13,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:07:13,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:07:13,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:07:13,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:07:13,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:07:13,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:07:13,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:07:13,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:07:13,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:07:13,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:07:13,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:07:13,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:07:13,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:07:13,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:07:13,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:07:13,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:07:13,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:07:13,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:07:13,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:07:13,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:07:13,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:07:13,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:07:13,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:07:13,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:07:13,916 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:07:13,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:07:13,917 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:07:13,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:07:13,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:07:13,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:07:13,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:07:13,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:07:13,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:07:13,918 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:07:13,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:07:13,918 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:07:13,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:07:13,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:07:13,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:07:13,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:07:13,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:07:13,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:07:13,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:07:13,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:07:13,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:07:13,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:07:13,921 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:07:13,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:07:13,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:07:13,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2022-07-22 21:07:14,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:07:14,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:07:14,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:07:14,167 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:07:14,168 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:07:14,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2022-07-22 21:07:14,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b15fb4f3d/8c32737bcd7a414a8f3db7900686242a/FLAGb2c63a11a [2022-07-22 21:07:14,575 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:07:14,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2022-07-22 21:07:14,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b15fb4f3d/8c32737bcd7a414a8f3db7900686242a/FLAGb2c63a11a [2022-07-22 21:07:14,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b15fb4f3d/8c32737bcd7a414a8f3db7900686242a [2022-07-22 21:07:14,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:07:14,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:07:14,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:07:14,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:07:14,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:07:14,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:07:14" (1/1) ... [2022-07-22 21:07:14,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b2b565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14, skipping insertion in model container [2022-07-22 21:07:14,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:07:14" (1/1) ... [2022-07-22 21:07:14,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:07:15,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:07:15,155 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/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2022-07-22 21:07:15,158 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/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2022-07-22 21:07:15,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:07:15,196 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:07:15,204 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/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2022-07-22 21:07:15,205 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/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2022-07-22 21:07:15,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:07:15,236 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:07:15,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15 WrapperNode [2022-07-22 21:07:15,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:07:15,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:07:15,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:07:15,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:07:15,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,280 INFO L137 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2022-07-22 21:07:15,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:07:15,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:07:15,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:07:15,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:07:15,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:07:15,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:07:15,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:07:15,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:07:15,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (1/1) ... [2022-07-22 21:07:15,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:07:15,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:07:15,367 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) [2022-07-22 21:07:15,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:07:15,407 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 21:07:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 21:07:15,407 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-07-22 21:07:15,408 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-07-22 21:07:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:07:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:07:15,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:07:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 21:07:15,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 21:07:15,379 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 [2022-07-22 21:07:15,490 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:07:15,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:07:15,744 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:07:15,752 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:07:15,752 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:07:15,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:07:15 BoogieIcfgContainer [2022-07-22 21:07:15,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:07:15,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:07:15,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:07:15,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:07:15,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:07:14" (1/3) ... [2022-07-22 21:07:15,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4822dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:07:15, skipping insertion in model container [2022-07-22 21:07:15,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:15" (2/3) ... [2022-07-22 21:07:15,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4822dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:07:15, skipping insertion in model container [2022-07-22 21:07:15,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:07:15" (3/3) ... [2022-07-22 21:07:15,761 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2022-07-22 21:07:15,771 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:07:15,772 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:07:15,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:07:15,837 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@50112169, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6673b9e3 [2022-07-22 21:07:15,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:07:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 83 states have (on average 1.6746987951807228) internal successors, (139), 85 states have internal predecessors, (139), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 21:07:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:07:15,846 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:07:15,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:07:15,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:07:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:07:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash -685161840, now seen corresponding path program 1 times [2022-07-22 21:07:15,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:07:15,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757684879] [2022-07-22 21:07:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:07:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:07:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:07:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:07:15,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:07:15,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757684879] [2022-07-22 21:07:15,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757684879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:07:15,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:07:15,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:07:15,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315335280] [2022-07-22 21:07:15,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:07:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:07:15,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:07:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:07:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:07:15,981 INFO L87 Difference]: Start difference. First operand has 97 states, 83 states have (on average 1.6746987951807228) internal successors, (139), 85 states have internal predecessors, (139), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:07:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:07:16,025 INFO L93 Difference]: Finished difference Result 189 states and 310 transitions. [2022-07-22 21:07:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:07:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:07:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:07:16,032 INFO L225 Difference]: With dead ends: 189 [2022-07-22 21:07:16,033 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 21:07:16,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:07:16,041 INFO L413 NwaCegarLoop]: 134 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, 134 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 [2022-07-22 21:07:16,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 21:07:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 21:07:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-22 21:07:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 79 states have internal predecessors, (111), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:07:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2022-07-22 21:07:16,097 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 7 [2022-07-22 21:07:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:07:16,097 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2022-07-22 21:07:16,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:07:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2022-07-22 21:07:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:07:16,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:07:16,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:07:16,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:07:16,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:07:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:07:16,100 INFO L85 PathProgramCache]: Analyzing trace with hash -685102258, now seen corresponding path program 1 times [2022-07-22 21:07:16,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:07:16,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247807421] [2022-07-22 21:07:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:07:16,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:07:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:07:16,125 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:07:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:07:16,163 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:07:16,164 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:07:16,165 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-22 21:07:16,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:07:16,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:07:16,169 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:07:16,171 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:07:16,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:07:16 BoogieIcfgContainer [2022-07-22 21:07:16,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:07:16,189 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:07:16,189 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:07:16,190 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:07:16,190 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:07:15" (3/4) ... [2022-07-22 21:07:16,192 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 21:07:16,192 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:07:16,192 INFO L158 Benchmark]: Toolchain (without parser) took 1242.86ms. Allocated memory was 109.1MB in the beginning and 146.8MB in the end (delta: 37.7MB). Free memory was 73.0MB in the beginning and 116.4MB in the end (delta: -43.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:07:16,193 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 78.7MB in the end (delta: 25.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:07:16,193 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.44ms. Allocated memory is still 109.1MB. Free memory was 72.8MB in the beginning and 78.8MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 21:07:16,193 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.84ms. Allocated memory is still 109.1MB. Free memory was 78.8MB in the beginning and 77.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:07:16,194 INFO L158 Benchmark]: Boogie Preprocessor took 50.81ms. Allocated memory is still 109.1MB. Free memory was 77.2MB in the beginning and 75.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:07:16,194 INFO L158 Benchmark]: RCFGBuilder took 421.11ms. Allocated memory is still 109.1MB. Free memory was 75.2MB in the beginning and 57.3MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-22 21:07:16,194 INFO L158 Benchmark]: TraceAbstraction took 433.83ms. Allocated memory was 109.1MB in the beginning and 146.8MB in the end (delta: 37.7MB). Free memory was 56.8MB in the beginning and 116.4MB in the end (delta: -59.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:07:16,195 INFO L158 Benchmark]: Witness Printer took 2.95ms. Allocated memory is still 146.8MB. Free memory is still 116.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:07:16,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 78.7MB in the end (delta: 25.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.44ms. Allocated memory is still 109.1MB. Free memory was 72.8MB in the beginning and 78.8MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.84ms. Allocated memory is still 109.1MB. Free memory was 78.8MB in the beginning and 77.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.81ms. Allocated memory is still 109.1MB. Free memory was 77.2MB in the beginning and 75.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 421.11ms. Allocated memory is still 109.1MB. Free memory was 75.2MB in the beginning and 57.3MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 433.83ms. Allocated memory was 109.1MB in the beginning and 146.8MB in the end (delta: 37.7MB). Free memory was 56.8MB in the beginning and 116.4MB in the end (delta: -59.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.95ms. Allocated memory is still 146.8MB. Free memory is still 116.4MB. 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: 48]: 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 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 97 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 134 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 134 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-22 21:07:16,223 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/combinations/square_8+soft_float_4-2a.c.cil.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 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:07:17,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:07:17,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:07:17,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:07:17,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:07:17,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:07:17,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:07:17,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:07:17,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:07:17,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:07:17,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:07:17,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:07:17,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:07:17,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:07:17,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:07:17,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:07:17,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:07:17,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:07:17,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:07:18,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:07:18,001 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:07:18,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:07:18,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:07:18,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:07:18,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:07:18,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:07:18,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:07:18,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:07:18,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:07:18,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:07:18,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:07:18,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:07:18,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:07:18,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:07:18,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:07:18,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:07:18,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:07:18,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:07:18,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:07:18,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:07:18,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:07:18,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:07:18,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 21:07:18,045 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:07:18,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:07:18,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:07:18,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:07:18,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:07:18,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:07:18,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:07:18,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:07:18,047 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:07:18,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:07:18,047 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:07:18,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:07:18,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:07:18,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:07:18,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:07:18,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:07:18,048 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 21:07:18,048 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 21:07:18,048 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 21:07:18,048 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:07:18,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:07:18,048 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:07:18,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:07:18,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:07:18,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:07:18,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:07:18,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:07:18,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:07:18,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:07:18,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:07:18,050 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 21:07:18,050 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 21:07:18,050 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:07:18,050 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:07:18,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:07:18,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 21:07:18,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2022-07-22 21:07:18,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:07:18,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:07:18,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:07:18,342 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:07:18,343 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:07:18,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2022-07-22 21:07:18,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0baf10dd/68e1736ed190424d8a01cf8e549fe12a/FLAG83af14c5a [2022-07-22 21:07:18,805 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:07:18,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2022-07-22 21:07:18,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0baf10dd/68e1736ed190424d8a01cf8e549fe12a/FLAG83af14c5a [2022-07-22 21:07:18,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0baf10dd/68e1736ed190424d8a01cf8e549fe12a [2022-07-22 21:07:18,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:07:18,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:07:18,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:07:18,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:07:18,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:07:18,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:07:18" (1/1) ... [2022-07-22 21:07:18,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eaea4e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:18, skipping insertion in model container [2022-07-22 21:07:18,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:07:18" (1/1) ... [2022-07-22 21:07:18,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:07:18,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:07:18,982 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/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2022-07-22 21:07:18,987 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/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2022-07-22 21:07:19,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:07:19,041 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:07:19,058 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/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2022-07-22 21:07:19,060 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/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2022-07-22 21:07:19,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:07:19,100 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:07:19,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19 WrapperNode [2022-07-22 21:07:19,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:07:19,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:07:19,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:07:19,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:07:19,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,142 INFO L137 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 70 [2022-07-22 21:07:19,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:07:19,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:07:19,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:07:19,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:07:19,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:07:19,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:07:19,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:07:19,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:07:19,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (1/1) ... [2022-07-22 21:07:19,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:07:19,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:07:19,253 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) [2022-07-22 21:07:19,285 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 [2022-07-22 21:07:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:07:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 21:07:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 21:07:19,303 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 21:07:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-07-22 21:07:19,303 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-07-22 21:07:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:07:19,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:07:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 21:07:19,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 21:07:19,379 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:07:19,381 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:07:21,848 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:07:21,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:07:21,853 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:07:21,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:07:21 BoogieIcfgContainer [2022-07-22 21:07:21,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:07:21,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:07:21,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:07:21,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:07:21,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:07:18" (1/3) ... [2022-07-22 21:07:21,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2e8916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:07:21, skipping insertion in model container [2022-07-22 21:07:21,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:19" (2/3) ... [2022-07-22 21:07:21,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2e8916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:07:21, skipping insertion in model container [2022-07-22 21:07:21,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:07:21" (3/3) ... [2022-07-22 21:07:21,865 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2022-07-22 21:07:21,880 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:07:21,880 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:07:21,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:07:21,937 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@67f9c803, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4af01a9a [2022-07-22 21:07:21,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:07:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 21:07:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:07:21,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:07:21,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:07:21,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:07:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:07:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-07-22 21:07:21,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:07:21,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832714554] [2022-07-22 21:07:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:07:21,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:07:21,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:07:21,993 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) [2022-07-22 21:07:22,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 21:07:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:07:22,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 21:07:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:07:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:07:22,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:07:22,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:07:22,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832714554] [2022-07-22 21:07:22,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832714554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:07:22,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:07:22,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:07:22,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444184976] [2022-07-22 21:07:22,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:07:22,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:07:22,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:07:22,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:07:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:07:22,497 INFO L87 Difference]: Start difference. First operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:07:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:07:22,517 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2022-07-22 21:07:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:07:22,519 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:07:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:07:22,525 INFO L225 Difference]: With dead ends: 121 [2022-07-22 21:07:22,525 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 21:07:22,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:07:22,531 INFO L413 NwaCegarLoop]: 81 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, 81 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 [2022-07-22 21:07:22,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 21:07:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 21:07:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-22 21:07:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:07:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2022-07-22 21:07:22,559 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 7 [2022-07-22 21:07:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:07:22,560 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2022-07-22 21:07:22,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:07:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2022-07-22 21:07:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:07:22,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:07:22,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:07:22,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-22 21:07:22,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:07:22,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:07:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:07:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-07-22 21:07:22,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:07:22,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930419200] [2022-07-22 21:07:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:07:22,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:07:22,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:07:22,787 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) [2022-07-22 21:07:22,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 21:09:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:07,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:09:07,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:22,405 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-07-22 21:09:56,029 WARN L833 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0)))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1))))) is different from false [2022-07-22 21:09:58,106 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0)))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1))))) is different from true [2022-07-22 21:09:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:09:58,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:09:58,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:58,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930419200] [2022-07-22 21:09:58,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930419200] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:09:58,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:09:58,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:09:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695138589] [2022-07-22 21:09:58,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:09:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:09:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:09:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-07-22 21:09:58,110 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:10:00,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 21:10:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:00,940 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2022-07-22 21:10:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:10:00,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:10:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:00,942 INFO L225 Difference]: With dead ends: 56 [2022-07-22 21:10:00,942 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 21:10:00,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-07-22 21:10:00,943 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 68 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:00,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 172 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 141 Unchecked, 2.6s Time] [2022-07-22 21:10:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 21:10:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-22 21:10:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.358974358974359) internal successors, (53), 40 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:10:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-07-22 21:10:00,949 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 7 [2022-07-22 21:10:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:00,949 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-07-22 21:10:00,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:10:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-07-22 21:10:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 21:10:00,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:00,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:00,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:01,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:01,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1078958274, now seen corresponding path program 1 times [2022-07-22 21:10:01,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:01,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879143117] [2022-07-22 21:10:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:01,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:01,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:01,167 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) [2022-07-22 21:10:01,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 21:10:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:10:01,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:01,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:01,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:01,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879143117] [2022-07-22 21:10:01,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879143117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:01,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:01,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:10:01,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020035750] [2022-07-22 21:10:01,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:01,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:10:01,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:10:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:01,701 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:02,345 INFO L93 Difference]: Finished difference Result 100 states and 135 transitions. [2022-07-22 21:10:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:10:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-07-22 21:10:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:02,349 INFO L225 Difference]: With dead ends: 100 [2022-07-22 21:10:02,350 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 21:10:02,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:10:02,351 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:02,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 425 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 21:10:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 21:10:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2022-07-22 21:10:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-22 21:10:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-07-22 21:10:02,367 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 32 [2022-07-22 21:10:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:02,368 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-07-22 21:10:02,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-07-22 21:10:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 21:10:02,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:02,371 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:02,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:02,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:02,590 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 452521591, now seen corresponding path program 1 times [2022-07-22 21:10:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:02,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064860213] [2022-07-22 21:10:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:02,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:02,599 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) [2022-07-22 21:10:02,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 21:10:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:02,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:10:02,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:03,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:03,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:03,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064860213] [2022-07-22 21:10:03,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064860213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:03,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:03,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-22 21:10:03,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179467256] [2022-07-22 21:10:03,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:03,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:10:03,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:10:03,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:10:03,723 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:10:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:04,712 INFO L93 Difference]: Finished difference Result 122 states and 160 transitions. [2022-07-22 21:10:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:10:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-22 21:10:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:04,714 INFO L225 Difference]: With dead ends: 122 [2022-07-22 21:10:04,715 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 21:10:04,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:10:04,717 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:04,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 492 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 21:10:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 21:10:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-07-22 21:10:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 56 states have internal predecessors, (69), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-22 21:10:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-07-22 21:10:04,738 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 36 [2022-07-22 21:10:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:04,739 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-07-22 21:10:04,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:10:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-07-22 21:10:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 21:10:04,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:04,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:04,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:04,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1328087799, now seen corresponding path program 1 times [2022-07-22 21:10:04,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:04,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642636001] [2022-07-22 21:10:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:04,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:04,955 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) [2022-07-22 21:10:04,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 21:10:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:05,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:10:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:05,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:05,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:05,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642636001] [2022-07-22 21:10:05,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642636001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:05,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:05,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-22 21:10:05,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075707802] [2022-07-22 21:10:05,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:05,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:10:05,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:10:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:05,886 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:06,485 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2022-07-22 21:10:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:10:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-07-22 21:10:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:06,489 INFO L225 Difference]: With dead ends: 114 [2022-07-22 21:10:06,489 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 21:10:06,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:10:06,490 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:06,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 462 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 21:10:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 21:10:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-22 21:10:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-22 21:10:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-07-22 21:10:06,503 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 40 [2022-07-22 21:10:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:06,504 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-07-22 21:10:06,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-07-22 21:10:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 21:10:06,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:06,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:06,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:06,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:06,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash 78255138, now seen corresponding path program 2 times [2022-07-22 21:10:06,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:06,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158048474] [2022-07-22 21:10:06,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:10:06,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:06,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:06,718 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) [2022-07-22 21:10:06,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 21:10:06,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:10:06,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:10:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:10:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:07,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:07,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:07,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158048474] [2022-07-22 21:10:07,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158048474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:07,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:07,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:10:07,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547217916] [2022-07-22 21:10:07,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:07,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:07,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:07,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:07,218 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:07,567 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-07-22 21:10:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:10:07,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-22 21:10:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:07,570 INFO L225 Difference]: With dead ends: 97 [2022-07-22 21:10:07,570 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 21:10:07,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:07,571 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 9 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:07,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 336 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-07-22 21:10:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 21:10:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-07-22 21:10:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 68 states have internal predecessors, (81), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-22 21:10:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2022-07-22 21:10:07,580 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 40 [2022-07-22 21:10:07,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:07,581 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2022-07-22 21:10:07,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2022-07-22 21:10:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 21:10:07,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:07,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:07,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:07,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:07,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash 135513440, now seen corresponding path program 1 times [2022-07-22 21:10:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:07,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626827001] [2022-07-22 21:10:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:07,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:07,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:07,795 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) [2022-07-22 21:10:07,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 21:10:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:10:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:08,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:08,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626827001] [2022-07-22 21:10:08,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626827001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:08,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:08,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:10:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545100829] [2022-07-22 21:10:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:08,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:08,262 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:08,570 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-07-22 21:10:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:10:08,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-22 21:10:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:08,573 INFO L225 Difference]: With dead ends: 97 [2022-07-22 21:10:08,573 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 21:10:08,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:08,574 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:08,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 309 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-07-22 21:10:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 21:10:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2022-07-22 21:10:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.234375) internal successors, (79), 66 states have internal predecessors, (79), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-22 21:10:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-07-22 21:10:08,584 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 40 [2022-07-22 21:10:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:08,584 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-07-22 21:10:08,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-07-22 21:10:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 21:10:08,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:08,586 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:08,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:08,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:08,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:08,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:08,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1165006364, now seen corresponding path program 1 times [2022-07-22 21:10:08,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:08,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195082779] [2022-07-22 21:10:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:08,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:08,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:08,790 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) [2022-07-22 21:10:08,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 21:10:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:08,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:10:08,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:10:09,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:09,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:09,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195082779] [2022-07-22 21:10:09,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195082779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:09,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:09,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 21:10:09,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917929108] [2022-07-22 21:10:09,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:09,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:10:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:10:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:10:09,753 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 21:10:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:11,629 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2022-07-22 21:10:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:10:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-07-22 21:10:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:11,630 INFO L225 Difference]: With dead ends: 127 [2022-07-22 21:10:11,630 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 21:10:11,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:10:11,631 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 34 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:11,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 572 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 21:10:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 21:10:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2022-07-22 21:10:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 77 states have internal predecessors, (92), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-22 21:10:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2022-07-22 21:10:11,647 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 45 [2022-07-22 21:10:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:11,648 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2022-07-22 21:10:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 21:10:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2022-07-22 21:10:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 21:10:11,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:11,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:11,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:11,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:11,864 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1862719454, now seen corresponding path program 1 times [2022-07-22 21:10:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:11,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664790155] [2022-07-22 21:10:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:11,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:11,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:11,867 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) [2022-07-22 21:10:11,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 21:10:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:10:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:10:12,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:10:14,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:14,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664790155] [2022-07-22 21:10:14,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664790155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:14,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:14,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-07-22 21:10:14,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872952434] [2022-07-22 21:10:14,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:14,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:10:14,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:10:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:10:14,217 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:10:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:16,300 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2022-07-22 21:10:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:10:16,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-07-22 21:10:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:16,302 INFO L225 Difference]: With dead ends: 134 [2022-07-22 21:10:16,302 INFO L226 Difference]: Without dead ends: 126 [2022-07-22 21:10:16,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:10:16,303 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 53 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:16,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 662 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 21:10:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-22 21:10:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2022-07-22 21:10:16,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 85 states have internal predecessors, (102), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-07-22 21:10:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2022-07-22 21:10:16,315 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 47 [2022-07-22 21:10:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:16,315 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2022-07-22 21:10:16,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:10:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2022-07-22 21:10:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 21:10:16,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:16,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:16,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:16,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:16,524 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1805461152, now seen corresponding path program 1 times [2022-07-22 21:10:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:16,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339436588] [2022-07-22 21:10:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:16,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:16,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:16,527 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) [2022-07-22 21:10:16,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 21:10:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:16,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:10:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 21:10:16,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:16,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:16,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339436588] [2022-07-22 21:10:16,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339436588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:16,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:16,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:10:16,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934363081] [2022-07-22 21:10:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:16,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:16,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:16,814 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 21:10:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:17,115 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2022-07-22 21:10:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:10:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-07-22 21:10:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:17,117 INFO L225 Difference]: With dead ends: 120 [2022-07-22 21:10:17,117 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 21:10:17,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:17,118 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:17,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 314 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 21:10:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 21:10:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-22 21:10:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 81 states have internal predecessors, (95), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 16 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-22 21:10:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2022-07-22 21:10:17,129 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 47 [2022-07-22 21:10:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:17,130 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2022-07-22 21:10:17,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 21:10:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2022-07-22 21:10:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 21:10:17,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:17,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:17,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:17,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:17,339 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2144611077, now seen corresponding path program 1 times [2022-07-22 21:10:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053260938] [2022-07-22 21:10:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:17,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:17,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:17,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:17,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 21:10:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:10:17,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:10:18,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:10:21,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:21,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053260938] [2022-07-22 21:10:21,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053260938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:21,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:21,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-22 21:10:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141128705] [2022-07-22 21:10:21,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:10:21,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:10:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:10:21,533 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:10:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:28,096 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2022-07-22 21:10:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:10:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2022-07-22 21:10:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:28,098 INFO L225 Difference]: With dead ends: 152 [2022-07-22 21:10:28,099 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 21:10:28,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 21:10:28,100 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 140 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:28,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1029 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 21:10:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 21:10:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2022-07-22 21:10:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 69 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (24), 12 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-22 21:10:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2022-07-22 21:10:28,109 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 49 [2022-07-22 21:10:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:28,109 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2022-07-22 21:10:28,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:10:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2022-07-22 21:10:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 21:10:28,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:28,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:28,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:28,312 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1400781647, now seen corresponding path program 2 times [2022-07-22 21:10:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:28,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29519385] [2022-07-22 21:10:28,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:10:28,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:28,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:28,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:28,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 21:10:28,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:10:28,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:10:28,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:10:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:10:29,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:10:32,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29519385] [2022-07-22 21:10:32,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29519385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:32,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:32,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-22 21:10:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011668026] [2022-07-22 21:10:32,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:32,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:10:32,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:32,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:10:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:10:32,603 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:10:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:38,842 INFO L93 Difference]: Finished difference Result 127 states and 174 transitions. [2022-07-22 21:10:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:10:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2022-07-22 21:10:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:38,844 INFO L225 Difference]: With dead ends: 127 [2022-07-22 21:10:38,844 INFO L226 Difference]: Without dead ends: 116 [2022-07-22 21:10:38,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 21:10:38,845 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 149 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:38,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 931 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 21:10:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-22 21:10:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2022-07-22 21:10:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 70 states have internal predecessors, (81), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (27), 13 states have call predecessors, (27), 12 states have call successors, (27) [2022-07-22 21:10:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-07-22 21:10:38,862 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 49 [2022-07-22 21:10:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:38,863 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-07-22 21:10:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:10:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-07-22 21:10:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 21:10:38,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:38,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:38,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-22 21:10:39,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:39,074 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1227181886, now seen corresponding path program 1 times [2022-07-22 21:10:39,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:39,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167887128] [2022-07-22 21:10:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:39,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:39,076 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:39,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 21:10:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:10:39,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:40,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:40,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167887128] [2022-07-22 21:10:40,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167887128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:40,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:40,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:10:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976441025] [2022-07-22 21:10:40,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:40,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:10:40,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:40,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:10:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:40,061 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:40,194 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2022-07-22 21:10:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:10:40,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-22 21:10:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:40,195 INFO L225 Difference]: With dead ends: 96 [2022-07-22 21:10:40,195 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 21:10:40,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:10:40,196 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:40,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 289 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-07-22 21:10:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 21:10:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-22 21:10:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 74 states have internal predecessors, (84), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-07-22 21:10:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-07-22 21:10:40,202 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 50 [2022-07-22 21:10:40,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:40,203 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-07-22 21:10:40,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2022-07-22 21:10:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 21:10:40,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:40,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:40,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:40,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:40,408 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 792222103, now seen corresponding path program 1 times [2022-07-22 21:10:40,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300977579] [2022-07-22 21:10:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:40,410 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:40,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 21:10:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:40,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:10:40,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:10:41,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 21:10:43,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300977579] [2022-07-22 21:10:43,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300977579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:43,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:43,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-22 21:10:43,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177839354] [2022-07-22 21:10:43,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:43,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:10:43,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:10:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:10:43,074 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:10:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:45,688 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2022-07-22 21:10:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:10:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2022-07-22 21:10:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:45,690 INFO L225 Difference]: With dead ends: 130 [2022-07-22 21:10:45,690 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 21:10:45,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:10:45,693 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 78 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:45,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 739 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 21:10:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 21:10:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2022-07-22 21:10:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 77 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-22 21:10:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2022-07-22 21:10:45,721 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 51 [2022-07-22 21:10:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:45,721 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2022-07-22 21:10:45,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 21:10:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2022-07-22 21:10:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 21:10:45,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:45,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:45,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-22 21:10:45,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:45,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:45,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1615591569, now seen corresponding path program 1 times [2022-07-22 21:10:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:45,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726796159] [2022-07-22 21:10:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:45,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:45,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:45,936 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:45,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 21:10:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:10:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 21:10:46,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:46,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:46,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726796159] [2022-07-22 21:10:46,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726796159] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:46,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:46,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 21:10:46,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547379021] [2022-07-22 21:10:46,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:46,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:10:46,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:10:46,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:10:46,562 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:10:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:47,395 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2022-07-22 21:10:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:10:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2022-07-22 21:10:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:47,396 INFO L225 Difference]: With dead ends: 160 [2022-07-22 21:10:47,397 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 21:10:47,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:10:47,397 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:47,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 509 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 21:10:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 21:10:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-07-22 21:10:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 71 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-22 21:10:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-07-22 21:10:47,403 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 55 [2022-07-22 21:10:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:47,403 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-07-22 21:10:47,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:10:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-07-22 21:10:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 21:10:47,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:47,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:47,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-22 21:10:47,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:47,604 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 381005423, now seen corresponding path program 1 times [2022-07-22 21:10:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:47,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109726493] [2022-07-22 21:10:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:47,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:47,621 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:47,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-22 21:10:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:10:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:52,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:52,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:52,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109726493] [2022-07-22 21:10:52,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109726493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:52,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:52,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:10:52,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389726046] [2022-07-22 21:10:52,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:52,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:10:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:10:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2022-07-22 21:10:52,629 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:52,770 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-07-22 21:10:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:10:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-07-22 21:10:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:52,775 INFO L225 Difference]: With dead ends: 95 [2022-07-22 21:10:52,775 INFO L226 Difference]: Without dead ends: 91 [2022-07-22 21:10:52,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2022-07-22 21:10:52,775 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 12 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:52,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 367 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-07-22 21:10:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-22 21:10:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-07-22 21:10:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.21875) internal successors, (78), 68 states have internal predecessors, (78), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-22 21:10:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2022-07-22 21:10:52,780 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 51 [2022-07-22 21:10:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:52,780 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2022-07-22 21:10:52,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2022-07-22 21:10:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 21:10:52,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:52,781 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:52,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-22 21:10:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:52,982 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:52,983 INFO L85 PathProgramCache]: Analyzing trace with hash 57968830, now seen corresponding path program 1 times [2022-07-22 21:10:52,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:52,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352372969] [2022-07-22 21:10:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:52,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:52,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:52,984 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:52,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-22 21:10:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:10:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:10:53,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:10:54,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:54,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352372969] [2022-07-22 21:10:54,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352372969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:54,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:54,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 21:10:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812758122] [2022-07-22 21:10:54,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:54,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:10:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:10:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:10:54,451 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 21:10:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:55,454 INFO L93 Difference]: Finished difference Result 112 states and 164 transitions. [2022-07-22 21:10:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:10:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-07-22 21:10:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:55,455 INFO L225 Difference]: With dead ends: 112 [2022-07-22 21:10:55,455 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 21:10:55,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:10:55,456 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 157 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:55,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 349 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 21:10:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 21:10:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-07-22 21:10:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2022-07-22 21:10:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2022-07-22 21:10:55,464 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 55 [2022-07-22 21:10:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:55,465 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2022-07-22 21:10:55,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 21:10:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2022-07-22 21:10:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 21:10:55,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:55,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:55,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:55,677 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash -768011691, now seen corresponding path program 1 times [2022-07-22 21:10:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:55,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082621392] [2022-07-22 21:10:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:55,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:55,679 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:55,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-22 21:10:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:10:55,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:10:56,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:10:57,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:57,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082621392] [2022-07-22 21:10:57,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082621392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:57,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:57,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 21:10:57,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737244283] [2022-07-22 21:10:57,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:57,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:10:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:10:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:10:57,406 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:10:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:58,737 INFO L93 Difference]: Finished difference Result 112 states and 162 transitions. [2022-07-22 21:10:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:10:58,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2022-07-22 21:10:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:58,739 INFO L225 Difference]: With dead ends: 112 [2022-07-22 21:10:58,739 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 21:10:58,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:10:58,739 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 97 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:58,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 505 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 21:10:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 21:10:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-07-22 21:10:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2022-07-22 21:10:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-07-22 21:10:58,744 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 64 [2022-07-22 21:10:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:58,745 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-07-22 21:10:58,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:10:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-07-22 21:10:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 21:10:58,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:58,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:58,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:58,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:58,946 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:58,946 INFO L85 PathProgramCache]: Analyzing trace with hash -773215852, now seen corresponding path program 1 times [2022-07-22 21:10:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:58,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612165461] [2022-07-22 21:10:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:58,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:58,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:58,948 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:58,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-22 21:10:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:10:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:10:59,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:11:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:11:00,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:00,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612165461] [2022-07-22 21:11:00,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612165461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:11:00,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:11:00,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 21:11:00,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979426142] [2022-07-22 21:11:00,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:11:00,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:11:00,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:11:00,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:11:00,606 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:11:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:01,773 INFO L93 Difference]: Finished difference Result 110 states and 154 transitions. [2022-07-22 21:11:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:11:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2022-07-22 21:11:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:01,774 INFO L225 Difference]: With dead ends: 110 [2022-07-22 21:11:01,774 INFO L226 Difference]: Without dead ends: 96 [2022-07-22 21:11:01,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:11:01,775 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 117 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:01,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 527 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 21:11:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-22 21:11:01,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-07-22 21:11:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.203125) internal successors, (77), 68 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-22 21:11:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2022-07-22 21:11:01,780 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 64 [2022-07-22 21:11:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:01,780 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2022-07-22 21:11:01,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:11:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2022-07-22 21:11:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 21:11:01,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:01,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:01,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:01,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:01,999 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash 336770129, now seen corresponding path program 1 times [2022-07-22 21:11:02,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:02,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535772783] [2022-07-22 21:11:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:02,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:02,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:02,002 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:02,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-22 21:11:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:02,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:11:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:11:02,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:11:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:11:03,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:03,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535772783] [2022-07-22 21:11:03,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535772783] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:11:03,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:11:03,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 21:11:03,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783874975] [2022-07-22 21:11:03,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:11:03,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:11:03,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:03,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:11:03,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:11:03,712 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:11:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:04,779 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2022-07-22 21:11:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:11:04,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2022-07-22 21:11:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:04,780 INFO L225 Difference]: With dead ends: 107 [2022-07-22 21:11:04,780 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 21:11:04,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:11:04,781 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 129 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:04,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 439 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 21:11:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 21:11:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2022-07-22 21:11:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 65 states have internal predecessors, (74), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-07-22 21:11:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2022-07-22 21:11:04,786 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 66 [2022-07-22 21:11:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:04,786 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2022-07-22 21:11:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:11:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2022-07-22 21:11:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 21:11:04,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:04,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:04,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:04,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:04,987 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash -644666623, now seen corresponding path program 1 times [2022-07-22 21:11:04,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:04,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393735442] [2022-07-22 21:11:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:04,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:04,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:04,990 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:04,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-22 21:11:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:11:05,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:11:11,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:11:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:11:18,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:18,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393735442] [2022-07-22 21:11:18,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393735442] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:11:18,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:11:18,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-07-22 21:11:18,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198826641] [2022-07-22 21:11:18,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:11:18,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 21:11:18,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 21:11:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-22 21:11:18,994 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-22 21:11:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:27,327 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2022-07-22 21:11:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:11:27,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2022-07-22 21:11:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:27,329 INFO L225 Difference]: With dead ends: 107 [2022-07-22 21:11:27,329 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 21:11:27,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 21:11:27,330 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 61 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:27,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 938 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 98 Unchecked, 1.5s Time] [2022-07-22 21:11:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 21:11:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2022-07-22 21:11:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 70 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 12 states have call predecessors, (29), 11 states have call successors, (29) [2022-07-22 21:11:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-07-22 21:11:27,338 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 73 [2022-07-22 21:11:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:27,338 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-07-22 21:11:27,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-22 21:11:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-07-22 21:11:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 21:11:27,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:27,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:27,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:27,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:27,548 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash -719396020, now seen corresponding path program 1 times [2022-07-22 21:11:27,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:27,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469954383] [2022-07-22 21:11:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:27,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:27,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:27,551 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:27,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-22 21:11:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 21:11:27,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 21:11:29,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:29,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:29,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469954383] [2022-07-22 21:11:29,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469954383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:29,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:11:29,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 21:11:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300957140] [2022-07-22 21:11:29,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:29,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:11:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:11:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:11:29,210 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:11:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:31,377 INFO L93 Difference]: Finished difference Result 109 states and 148 transitions. [2022-07-22 21:11:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:11:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2022-07-22 21:11:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:31,379 INFO L225 Difference]: With dead ends: 109 [2022-07-22 21:11:31,379 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 21:11:31,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:11:31,380 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 47 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:31,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 581 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 21:11:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 21:11:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-07-22 21:11:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 74 states have internal predecessors, (83), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (33), 13 states have call predecessors, (33), 12 states have call successors, (33) [2022-07-22 21:11:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 129 transitions. [2022-07-22 21:11:31,391 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 129 transitions. Word has length 73 [2022-07-22 21:11:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:31,391 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 129 transitions. [2022-07-22 21:11:31,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 21:11:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 129 transitions. [2022-07-22 21:11:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 21:11:31,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:31,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:31,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:31,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:31,600 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash -425811905, now seen corresponding path program 1 times [2022-07-22 21:11:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:31,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373242739] [2022-07-22 21:11:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:31,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:31,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:31,602 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:31,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-22 21:11:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:31,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 21:11:31,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 21:11:33,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:11:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:11:37,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:37,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373242739] [2022-07-22 21:11:37,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373242739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:11:37,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:11:37,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-22 21:11:37,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293164735] [2022-07-22 21:11:37,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:11:37,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:11:37,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:11:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:11:37,701 INFO L87 Difference]: Start difference. First operand 93 states and 129 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 21:11:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:44,955 INFO L93 Difference]: Finished difference Result 114 states and 156 transitions. [2022-07-22 21:11:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:11:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2022-07-22 21:11:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:44,959 INFO L225 Difference]: With dead ends: 114 [2022-07-22 21:11:44,960 INFO L226 Difference]: Without dead ends: 103 [2022-07-22 21:11:44,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 21:11:44,960 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 153 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:44,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 681 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 21:11:44,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-22 21:11:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2022-07-22 21:11:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 73 states have internal predecessors, (82), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-22 21:11:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2022-07-22 21:11:44,980 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 73 [2022-07-22 21:11:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:44,980 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2022-07-22 21:11:44,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 21:11:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2022-07-22 21:11:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 21:11:44,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:44,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:44,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-22 21:11:45,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:45,189 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1804933507, now seen corresponding path program 2 times [2022-07-22 21:11:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:45,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281225379] [2022-07-22 21:11:45,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:11:45,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:45,192 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:45,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-22 21:11:45,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:11:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:11:45,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 21:11:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 21:11:47,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:11:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:11:51,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:51,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281225379] [2022-07-22 21:11:51,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281225379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:11:51,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:11:51,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-22 21:11:51,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245448651] [2022-07-22 21:11:51,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:11:51,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:11:51,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:51,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:11:51,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:11:51,383 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 21:11:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:58,329 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2022-07-22 21:11:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:11:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2022-07-22 21:11:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:58,332 INFO L225 Difference]: With dead ends: 112 [2022-07-22 21:11:58,332 INFO L226 Difference]: Without dead ends: 103 [2022-07-22 21:11:58,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 21:11:58,332 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 174 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:58,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 659 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 21:11:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-22 21:11:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2022-07-22 21:11:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 11 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (19), 11 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-22 21:11:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2022-07-22 21:11:58,338 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 73 [2022-07-22 21:11:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:58,338 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2022-07-22 21:11:58,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 21:11:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2022-07-22 21:11:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 21:11:58,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:58,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:58,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:58,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:58,547 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:58,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1949058828, now seen corresponding path program 1 times [2022-07-22 21:11:58,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:58,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729299633] [2022-07-22 21:11:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:58,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:58,549 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:58,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-22 21:11:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:58,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 21:11:58,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 21:11:59,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:59,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729299633] [2022-07-22 21:11:59,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729299633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:59,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:11:59,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 21:11:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886913920] [2022-07-22 21:11:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:59,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:11:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:11:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:11:59,975 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)