./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_6+soft_float_5a.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 5c4c867e245be659b2db84171c62e45b03155ac4269b1a7d8c363c8f991a60db --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:31:08,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:31:08,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:31:08,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:31:08,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:31:08,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:31:08,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:31:08,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:31:08,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:31:08,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:31:08,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:31:08,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:31:08,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:31:08,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:31:08,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:31:08,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:31:08,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:31:08,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:31:08,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:31:08,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:31:08,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:31:08,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:31:08,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:31:08,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:31:08,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:31:08,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:31:08,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:31:08,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:31:08,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:31:08,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:31:08,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:31:08,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:31:08,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:31:08,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:31:08,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:31:08,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:31:08,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:31:08,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:31:08,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:31:08,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:31:08,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:31:08,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:31:08,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:31:08,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:31:08,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:31:08,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:31:08,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:31:08,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:31:08,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:31:08,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:31:08,512 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:31:08,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:31:08,513 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:31:08,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:31:08,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:31:08,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:31:08,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:31:08,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:31:08,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:31:08,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:31:08,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:31:08,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:31:08,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:31:08,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:31:08,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:31:08,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:31:08,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:31:08,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:31:08,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:31:08,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:31:08,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:31:08,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:31:08,516 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:31:08,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:31:08,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:31:08,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:31:08,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c4c867e245be659b2db84171c62e45b03155ac4269b1a7d8c363c8f991a60db [2021-12-17 21:31:08,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:31:08,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:31:08,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:31:08,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:31:08,735 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:31:08,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c [2021-12-17 21:31:08,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bec16406/ace67384f92a420e8fb9eeb3e3968cf8/FLAGba9334499 [2021-12-17 21:31:09,174 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:31:09,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c [2021-12-17 21:31:09,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bec16406/ace67384f92a420e8fb9eeb3e3968cf8/FLAGba9334499 [2021-12-17 21:31:09,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bec16406/ace67384f92a420e8fb9eeb3e3968cf8 [2021-12-17 21:31:09,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:31:09,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:31:09,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:31:09,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:31:09,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:31:09,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ee64fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09, skipping insertion in model container [2021-12-17 21:31:09,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:31:09,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:31:09,795 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_6+soft_float_5a.c.cil.c[1997,2010] [2021-12-17 21:31:09,800 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_6+soft_float_5a.c.cil.c[2366,2379] [2021-12-17 21:31:09,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:31:09,833 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:31:09,843 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_6+soft_float_5a.c.cil.c[1997,2010] [2021-12-17 21:31:09,844 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_6+soft_float_5a.c.cil.c[2366,2379] [2021-12-17 21:31:09,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:31:09,875 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:31:09,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09 WrapperNode [2021-12-17 21:31:09,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:31:09,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:31:09,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:31:09,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:31:09,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,919 INFO L137 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2021-12-17 21:31:09,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:31:09,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:31:09,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:31:09,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:31:09,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:31:09,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:31:09,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:31:09,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:31:09,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (1/1) ... [2021-12-17 21:31:09,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:31:09,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:31:10,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:31:10,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:31:10,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:31:10,061 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-17 21:31:10,062 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-17 21:31:10,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:31:10,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:31:10,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:31:10,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 21:31:10,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 21:31:10,122 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:31:10,123 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:31:10,328 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:31:10,336 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:31:10,336 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 21:31:10,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:31:10 BoogieIcfgContainer [2021-12-17 21:31:10,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:31:10,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:31:10,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:31:10,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:31:10,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:31:09" (1/3) ... [2021-12-17 21:31:10,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b92c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:31:10, skipping insertion in model container [2021-12-17 21:31:10,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:09" (2/3) ... [2021-12-17 21:31:10,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b92c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:31:10, skipping insertion in model container [2021-12-17 21:31:10,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:31:10" (3/3) ... [2021-12-17 21:31:10,345 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_5a.c.cil.c [2021-12-17 21:31:10,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:31:10,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:31:10,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:31:10,392 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:31:10,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:31:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 21:31:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:31:10,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:31:10,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:31:10,411 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:31:10,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:31:10,415 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-17 21:31:10,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:31:10,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342026484] [2021-12-17 21:31:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:31:10,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:31:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:31:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:31:10,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:31:10,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342026484] [2021-12-17 21:31:10,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342026484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:31:10,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:31:10,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:31:10,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604633919] [2021-12-17 21:31:10,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:31:10,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 21:31:10,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:31:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 21:31:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:31:10,584 INFO L87 Difference]: Start difference. First operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2021-12-17 21:31:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:31:10,615 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2021-12-17 21:31:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 21:31:10,618 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 [2021-12-17 21:31:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:31:10,626 INFO L225 Difference]: With dead ends: 117 [2021-12-17 21:31:10,626 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 21:31:10,630 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:31:10,634 INFO L933 BasicCegarLoop]: 82 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, 82 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 [2021-12-17 21:31:10,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:31:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 21:31:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-17 21:31:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 21:31:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2021-12-17 21:31:10,681 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 7 [2021-12-17 21:31:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:31:10,682 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2021-12-17 21:31:10,682 INFO L471 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) [2021-12-17 21:31:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2021-12-17 21:31:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:31:10,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:31:10,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:31:10,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:31:10,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:31:10,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:31:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-17 21:31:10,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:31:10,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749811616] [2021-12-17 21:31:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:31:10,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:31:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 21:31:10,719 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 21:31:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 21:31:10,803 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 21:31:10,805 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 21:31:10,806 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-17 21:31:10,808 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 21:31:10,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:31:10,811 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-17 21:31:10,813 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 21:31:10,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:31:10 BoogieIcfgContainer [2021-12-17 21:31:10,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 21:31:10,829 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 21:31:10,829 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 21:31:10,829 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 21:31:10,830 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:31:10" (3/4) ... [2021-12-17 21:31:10,832 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 21:31:10,832 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 21:31:10,833 INFO L158 Benchmark]: Toolchain (without parser) took 1224.13ms. Allocated memory was 109.1MB in the beginning and 148.9MB in the end (delta: 39.8MB). Free memory was 83.9MB in the beginning and 123.0MB in the end (delta: -39.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:31:10,833 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:31:10,834 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.23ms. Allocated memory was 109.1MB in the beginning and 148.9MB in the end (delta: 39.8MB). Free memory was 83.7MB in the beginning and 122.2MB in the end (delta: -38.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 21:31:10,834 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.79ms. Allocated memory is still 148.9MB. Free memory was 122.2MB in the beginning and 120.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 21:31:10,835 INFO L158 Benchmark]: Boogie Preprocessor took 34.46ms. Allocated memory is still 148.9MB. Free memory was 120.2MB in the beginning and 118.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 21:31:10,835 INFO L158 Benchmark]: RCFGBuilder took 382.26ms. Allocated memory is still 148.9MB. Free memory was 118.6MB in the beginning and 105.0MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 21:31:10,836 INFO L158 Benchmark]: TraceAbstraction took 489.64ms. Allocated memory is still 148.9MB. Free memory was 104.8MB in the beginning and 123.0MB in the end (delta: -18.2MB). Peak memory consumption was 26.2MB. Max. memory is 16.1GB. [2021-12-17 21:31:10,836 INFO L158 Benchmark]: Witness Printer took 3.24ms. Allocated memory is still 148.9MB. Free memory is still 123.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:31:10,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.23ms. Allocated memory was 109.1MB in the beginning and 148.9MB in the end (delta: 39.8MB). Free memory was 83.7MB in the beginning and 122.2MB in the end (delta: -38.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.79ms. Allocated memory is still 148.9MB. Free memory was 122.2MB in the beginning and 120.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.46ms. Allocated memory is still 148.9MB. Free memory was 120.2MB in the beginning and 118.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 382.26ms. Allocated memory is still 148.9MB. Free memory was 118.6MB in the beginning and 105.0MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 489.64ms. Allocated memory is still 148.9MB. Free memory was 104.8MB in the beginning and 123.0MB in the end (delta: -18.2MB). Peak memory consumption was 26.2MB. Max. memory is 16.1GB. * Witness Printer took 3.24ms. Allocated memory is still 148.9MB. Free memory is still 123.0MB. 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: [L322] COND TRUE __VERIFIER_nondet_int() [L323] 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 < 1.399f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: 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 3 procedures, 61 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, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 82 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, 82 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=61occurred 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, 0.1s 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 [2021-12-17 21:31:10,878 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_6+soft_float_5a.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 5c4c867e245be659b2db84171c62e45b03155ac4269b1a7d8c363c8f991a60db --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:31:12,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:31:12,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:31:12,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:31:12,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:31:12,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:31:12,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:31:12,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:31:12,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:31:12,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:31:12,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:31:12,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:31:12,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:31:12,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:31:12,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:31:12,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:31:12,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:31:12,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:31:12,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:31:12,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:31:12,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:31:12,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:31:12,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:31:12,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:31:12,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:31:12,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:31:12,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:31:12,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:31:12,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:31:12,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:31:12,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:31:12,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:31:12,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:31:12,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:31:12,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:31:12,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:31:12,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:31:12,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:31:12,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:31:12,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:31:12,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:31:12,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 21:31:12,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:31:12,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:31:12,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:31:12,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:31:12,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:31:12,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:31:12,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:31:12,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:31:12,818 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:31:12,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:31:12,819 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:31:12,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:31:12,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:31:12,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:31:12,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:31:12,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:31:12,821 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 21:31:12,821 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 21:31:12,821 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 21:31:12,821 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:31:12,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:31:12,822 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:31:12,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:31:12,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:31:12,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:31:12,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:31:12,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:31:12,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:31:12,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:31:12,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:31:12,833 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 21:31:12,833 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 21:31:12,833 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:31:12,834 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:31:12,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:31:12,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:31:12,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 21:31:12,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c4c867e245be659b2db84171c62e45b03155ac4269b1a7d8c363c8f991a60db [2021-12-17 21:31:13,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:31:13,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:31:13,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:31:13,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:31:13,154 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:31:13,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c [2021-12-17 21:31:13,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c98ddf27/e94b2a952df44788a875072fb94d6408/FLAGa94039a77 [2021-12-17 21:31:13,624 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:31:13,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c [2021-12-17 21:31:13,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c98ddf27/e94b2a952df44788a875072fb94d6408/FLAGa94039a77 [2021-12-17 21:31:14,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c98ddf27/e94b2a952df44788a875072fb94d6408 [2021-12-17 21:31:14,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:31:14,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:31:14,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:31:14,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:31:14,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:31:14,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8465e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14, skipping insertion in model container [2021-12-17 21:31:14,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:31:14,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:31:14,193 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_6+soft_float_5a.c.cil.c[1997,2010] [2021-12-17 21:31:14,197 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_6+soft_float_5a.c.cil.c[2366,2379] [2021-12-17 21:31:14,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:31:14,268 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:31:14,280 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_6+soft_float_5a.c.cil.c[1997,2010] [2021-12-17 21:31:14,281 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_6+soft_float_5a.c.cil.c[2366,2379] [2021-12-17 21:31:14,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:31:14,313 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:31:14,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14 WrapperNode [2021-12-17 21:31:14,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:31:14,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:31:14,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:31:14,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:31:14,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,349 INFO L137 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2021-12-17 21:31:14,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:31:14,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:31:14,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:31:14,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:31:14,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:31:14,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:31:14,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:31:14,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:31:14,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (1/1) ... [2021-12-17 21:31:14,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:31:14,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:31:14,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:31:14,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:31:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:31:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 21:31:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-17 21:31:14,440 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-17 21:31:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:31:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:31:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 21:31:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 21:31:14,525 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:31:14,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:31:16,955 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:31:16,960 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:31:16,961 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 21:31:16,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:31:16 BoogieIcfgContainer [2021-12-17 21:31:16,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:31:16,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:31:16,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:31:16,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:31:16,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:31:14" (1/3) ... [2021-12-17 21:31:16,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cae260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:31:16, skipping insertion in model container [2021-12-17 21:31:16,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:31:14" (2/3) ... [2021-12-17 21:31:16,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cae260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:31:16, skipping insertion in model container [2021-12-17 21:31:16,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:31:16" (3/3) ... [2021-12-17 21:31:16,968 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_5a.c.cil.c [2021-12-17 21:31:16,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:31:16,972 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:31:17,007 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:31:17,012 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:31:17,012 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:31:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 21:31:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:31:17,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:31:17,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:31:17,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:31:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:31:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-17 21:31:17,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:31:17,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778765153] [2021-12-17 21:31:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:31:17,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:31:17,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:31:17,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:31:17,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 21:31:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:31:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 21:31:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:31:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:31:17,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:31:17,426 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:31:17,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778765153] [2021-12-17 21:31:17,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778765153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:31:17,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:31:17,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:31:17,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699282132] [2021-12-17 21:31:17,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:31:17,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 21:31:17,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:31:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 21:31:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:31:17,480 INFO L87 Difference]: Start difference. First operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2021-12-17 21:31:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:31:17,515 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2021-12-17 21:31:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 21:31:17,517 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 [2021-12-17 21:31:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:31:17,524 INFO L225 Difference]: With dead ends: 117 [2021-12-17 21:31:17,524 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 21:31:17,526 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:31:17,529 INFO L933 BasicCegarLoop]: 82 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, 82 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 [2021-12-17 21:31:17,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:31:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 21:31:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-17 21:31:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 21:31:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2021-12-17 21:31:17,557 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 7 [2021-12-17 21:31:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:31:17,558 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2021-12-17 21:31:17,558 INFO L471 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) [2021-12-17 21:31:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2021-12-17 21:31:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:31:17,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:31:17,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:31:17,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-17 21:31:17,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:31:17,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:31:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:31:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-17 21:31:17,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:31:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486273142] [2021-12-17 21:31:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:31:17,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:31:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:31:17,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:31:17,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 21:39:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:39:51,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:39:51,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:40:06,491 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (= |c_ULTIMATE.start_main1_~result~0#1| (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|))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)))))) is different from false [2021-12-17 21:40:56,540 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (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|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) is different from false [2021-12-17 21:40:58,596 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (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|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) is different from true [2021-12-17 21:40:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:40:58,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:40:58,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:40:58,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486273142] [2021-12-17 21:40:58,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486273142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:40:58,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:40:58,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:40:58,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987997280] [2021-12-17 21:40:58,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:40:58,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:40:58,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:40:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:40:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-12-17 21:40:58,599 INFO L87 Difference]: Start difference. First operand 52 states and 71 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) [2021-12-17 21:41:01,027 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 21:41:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:01,223 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-12-17 21:41:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:41:01,224 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 [2021-12-17 21:41:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:01,225 INFO L225 Difference]: With dead ends: 52 [2021-12-17 21:41:01,225 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 21:41:01,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-12-17 21:41:01,227 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 67 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:01,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 178 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 137 Unchecked, 2.4s Time] [2021-12-17 21:41:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 21:41:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-17 21:41:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 21:41:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2021-12-17 21:41:01,234 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 7 [2021-12-17 21:41:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:01,234 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2021-12-17 21:41:01,234 INFO L471 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) [2021-12-17 21:41:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2021-12-17 21:41:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 21:41:01,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:01,236 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-12-17 21:41:01,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-17 21:41:01,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:01,440 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:01,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1370969986, now seen corresponding path program 1 times [2021-12-17 21:41:01,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:01,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673903722] [2021-12-17 21:41:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:01,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:01,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:01,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:41:01,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 21:41:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:01,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:41:01,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:01,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:41:01,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673903722] [2021-12-17 21:41:01,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673903722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:41:01,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:41:01,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:41:01,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680079528] [2021-12-17 21:41:01,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:41:01,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:41:01,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:01,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:41:01,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:41:01,790 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:41:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:02,107 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2021-12-17 21:41:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:41:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2021-12-17 21:41:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:02,110 INFO L225 Difference]: With dead ends: 104 [2021-12-17 21:41:02,110 INFO L226 Difference]: Without dead ends: 61 [2021-12-17 21:41:02,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:41:02,112 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:02,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:41:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-17 21:41:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2021-12-17 21:41:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 21:41:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2021-12-17 21:41:02,121 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 43 [2021-12-17 21:41:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:02,122 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2021-12-17 21:41:02,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:41:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2021-12-17 21:41:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 21:41:02,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:02,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-17 21:41:02,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:02,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:02,334 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:02,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:02,334 INFO L85 PathProgramCache]: Analyzing trace with hash -14997806, now seen corresponding path program 1 times [2021-12-17 21:41:02,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:02,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229659082] [2021-12-17 21:41:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:02,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:02,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:02,337 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) [2021-12-17 21:41:02,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 21:41:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:02,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:41:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:02,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:41:02,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:02,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229659082] [2021-12-17 21:41:02,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229659082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:41:02,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:41:02,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:41:02,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324480922] [2021-12-17 21:41:02,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:41:02,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:41:02,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:41:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:41:02,732 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:41:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:03,019 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2021-12-17 21:41:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:41:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-12-17 21:41:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:03,021 INFO L225 Difference]: With dead ends: 108 [2021-12-17 21:41:03,021 INFO L226 Difference]: Without dead ends: 64 [2021-12-17 21:41:03,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:41:03,022 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:03,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:41:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-17 21:41:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-12-17 21:41:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:41:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-12-17 21:41:03,036 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2021-12-17 21:41:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:03,036 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-12-17 21:41:03,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:41:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-12-17 21:41:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 21:41:03,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:03,038 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-17 21:41:03,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:03,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:03,247 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1638472845, now seen corresponding path program 1 times [2021-12-17 21:41:03,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:03,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539467672] [2021-12-17 21:41:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:03,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:03,250 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) [2021-12-17 21:41:03,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 21:41:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:03,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:41:03,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:03,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:41:03,604 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:03,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539467672] [2021-12-17 21:41:03,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539467672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:41:03,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:41:03,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:41:03,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469784971] [2021-12-17 21:41:03,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:41:03,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:41:03,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:41:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:41:03,606 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:41:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:03,933 INFO L93 Difference]: Finished difference Result 117 states and 165 transitions. [2021-12-17 21:41:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:41:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-12-17 21:41:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:03,935 INFO L225 Difference]: With dead ends: 117 [2021-12-17 21:41:03,935 INFO L226 Difference]: Without dead ends: 68 [2021-12-17 21:41:03,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:41:03,938 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:03,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 153 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:41:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-17 21:41:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-12-17 21:41:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:41:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2021-12-17 21:41:03,946 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 47 [2021-12-17 21:41:03,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:03,946 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2021-12-17 21:41:03,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:41:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2021-12-17 21:41:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 21:41:03,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:03,948 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-17 21:41:03,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:04,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:04,151 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:04,152 INFO L85 PathProgramCache]: Analyzing trace with hash 388661875, now seen corresponding path program 1 times [2021-12-17 21:41:04,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:04,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754319849] [2021-12-17 21:41:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:04,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:04,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:04,154 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) [2021-12-17 21:41:04,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 21:41:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 21:41:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:04,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:41:04,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:04,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754319849] [2021-12-17 21:41:04,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754319849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:41:04,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:41:04,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:41:04,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127152740] [2021-12-17 21:41:04,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:41:04,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:41:04,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:41:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:41:04,565 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:41:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:05,051 INFO L93 Difference]: Finished difference Result 125 states and 176 transitions. [2021-12-17 21:41:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:41:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-12-17 21:41:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:05,054 INFO L225 Difference]: With dead ends: 125 [2021-12-17 21:41:05,054 INFO L226 Difference]: Without dead ends: 75 [2021-12-17 21:41:05,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:41:05,056 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:05,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 202 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:41:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-17 21:41:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-12-17 21:41:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.38) internal successors, (69), 51 states have internal predecessors, (69), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:41:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2021-12-17 21:41:05,063 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 48 [2021-12-17 21:41:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:05,064 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-12-17 21:41:05,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:41:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2021-12-17 21:41:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 21:41:05,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:05,066 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-12-17 21:41:05,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-17 21:41:05,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:05,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash 933318672, now seen corresponding path program 1 times [2021-12-17 21:41:05,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:05,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733815674] [2021-12-17 21:41:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:05,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:05,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:05,277 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) [2021-12-17 21:41:05,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 21:41:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 21:41:05,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:05,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:41:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:41:06,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:06,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733815674] [2021-12-17 21:41:06,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733815674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:41:06,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:41:06,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 21:41:06,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762974500] [2021-12-17 21:41:06,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:41:06,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:41:06,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:06,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:41:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:41:06,319 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:07,246 INFO L93 Difference]: Finished difference Result 146 states and 208 transitions. [2021-12-17 21:41:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 21:41:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2021-12-17 21:41:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:07,248 INFO L225 Difference]: With dead ends: 146 [2021-12-17 21:41:07,249 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 21:41:07,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:41:07,250 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 42 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:07,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 330 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:41:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 21:41:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2021-12-17 21:41:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 59 states have internal predecessors, (82), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:41:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 95 transitions. [2021-12-17 21:41:07,259 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 95 transitions. Word has length 49 [2021-12-17 21:41:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:07,260 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 95 transitions. [2021-12-17 21:41:07,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 95 transitions. [2021-12-17 21:41:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 21:41:07,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:07,262 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-17 21:41:07,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:07,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:07,467 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:07,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:07,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1187730481, now seen corresponding path program 1 times [2021-12-17 21:41:07,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:07,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342393885] [2021-12-17 21:41:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:07,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:07,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:07,471 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) [2021-12-17 21:41:07,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 21:41:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:41:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:07,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:41:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:41:08,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:08,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342393885] [2021-12-17 21:41:08,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342393885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:41:08,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:41:08,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 21:41:08,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254460287] [2021-12-17 21:41:08,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:41:08,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:41:08,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:08,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:41:08,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:41:08,594 INFO L87 Difference]: Start difference. First operand 67 states and 95 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:09,855 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2021-12-17 21:41:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:41:09,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 51 [2021-12-17 21:41:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:09,856 INFO L225 Difference]: With dead ends: 164 [2021-12-17 21:41:09,856 INFO L226 Difference]: Without dead ends: 105 [2021-12-17 21:41:09,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:41:09,858 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 134 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:09,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 334 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:41:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-17 21:41:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 71. [2021-12-17 21:41:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.435483870967742) internal successors, (89), 63 states have internal predecessors, (89), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:41:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 102 transitions. [2021-12-17 21:41:09,868 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 102 transitions. Word has length 51 [2021-12-17 21:41:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:09,869 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 102 transitions. [2021-12-17 21:41:09,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 102 transitions. [2021-12-17 21:41:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 21:41:09,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:09,870 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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] [2021-12-17 21:41:09,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:10,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:10,080 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash -763243182, now seen corresponding path program 2 times [2021-12-17 21:41:10,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:10,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124654155] [2021-12-17 21:41:10,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 21:41:10,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:10,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:10,082 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) [2021-12-17 21:41:10,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 21:41:10,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 21:41:10,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 21:41:10,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:41:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-17 21:41:10,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:41:10,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124654155] [2021-12-17 21:41:10,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124654155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:41:10,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:41:10,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:41:10,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233613089] [2021-12-17 21:41:10,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:41:10,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:41:10,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:10,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:41:10,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:41:10,471 INFO L87 Difference]: Start difference. First operand 71 states and 102 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:41:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:10,834 INFO L93 Difference]: Finished difference Result 119 states and 169 transitions. [2021-12-17 21:41:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:41:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2021-12-17 21:41:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:10,837 INFO L225 Difference]: With dead ends: 119 [2021-12-17 21:41:10,837 INFO L226 Difference]: Without dead ends: 98 [2021-12-17 21:41:10,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:41:10,838 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 34 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:10,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 340 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:41:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-17 21:41:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-12-17 21:41:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.3835616438356164) internal successors, (101), 75 states have internal predecessors, (101), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:41:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2021-12-17 21:41:10,846 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 58 [2021-12-17 21:41:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:10,847 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2021-12-17 21:41:10,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:41:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2021-12-17 21:41:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 21:41:10,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:10,848 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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] [2021-12-17 21:41:10,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-17 21:41:11,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:11,058 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1156270192, now seen corresponding path program 1 times [2021-12-17 21:41:11,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:11,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951766314] [2021-12-17 21:41:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:11,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:11,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:11,061 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) [2021-12-17 21:41:11,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 21:41:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:41:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:11,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:41:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:41:12,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951766314] [2021-12-17 21:41:12,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951766314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:41:12,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:41:12,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 21:41:12,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688486122] [2021-12-17 21:41:12,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:41:12,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 21:41:12,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 21:41:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:41:12,963 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:15,826 INFO L93 Difference]: Finished difference Result 231 states and 330 transitions. [2021-12-17 21:41:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 21:41:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-12-17 21:41:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:15,829 INFO L225 Difference]: With dead ends: 231 [2021-12-17 21:41:15,829 INFO L226 Difference]: Without dead ends: 155 [2021-12-17 21:41:15,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-12-17 21:41:15,830 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 204 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:15,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 592 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 21:41:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-17 21:41:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2021-12-17 21:41:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 89 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:41:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2021-12-17 21:41:15,843 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 58 [2021-12-17 21:41:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:15,843 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2021-12-17 21:41:15,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:15,843 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2021-12-17 21:41:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 21:41:15,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:15,844 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 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] [2021-12-17 21:41:15,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:16,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:16,054 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1365284847, now seen corresponding path program 1 times [2021-12-17 21:41:16,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:16,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137956363] [2021-12-17 21:41:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:16,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:16,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:16,057 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) [2021-12-17 21:41:16,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 21:41:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:16,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:41:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:16,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:41:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:41:18,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:18,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137956363] [2021-12-17 21:41:18,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137956363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:41:18,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:41:18,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-17 21:41:18,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512612742] [2021-12-17 21:41:18,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:41:18,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 21:41:18,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:18,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 21:41:18,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:41:18,395 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:22,016 INFO L93 Difference]: Finished difference Result 254 states and 368 transitions. [2021-12-17 21:41:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 21:41:22,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2021-12-17 21:41:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:22,018 INFO L225 Difference]: With dead ends: 254 [2021-12-17 21:41:22,018 INFO L226 Difference]: Without dead ends: 164 [2021-12-17 21:41:22,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=354, Invalid=638, Unknown=0, NotChecked=0, Total=992 [2021-12-17 21:41:22,019 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 321 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:22,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 664 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:41:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-17 21:41:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 108. [2021-12-17 21:41:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 97 states have (on average 1.4536082474226804) internal successors, (141), 99 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:41:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 159 transitions. [2021-12-17 21:41:22,031 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 159 transitions. Word has length 63 [2021-12-17 21:41:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:22,031 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 159 transitions. [2021-12-17 21:41:22,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 159 transitions. [2021-12-17 21:41:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 21:41:22,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:22,033 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 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] [2021-12-17 21:41:22,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-17 21:41:22,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:22,243 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:22,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1400933040, now seen corresponding path program 2 times [2021-12-17 21:41:22,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554658943] [2021-12-17 21:41:22,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 21:41:22,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:22,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:22,245 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) [2021-12-17 21:41:22,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 21:41:22,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 21:41:22,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 21:41:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:41:22,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-17 21:41:22,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:41:22,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:22,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554658943] [2021-12-17 21:41:22,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554658943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:41:22,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:41:22,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 21:41:22,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040888737] [2021-12-17 21:41:22,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:41:22,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:41:22,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:41:22,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:41:22,438 INFO L87 Difference]: Start difference. First operand 108 states and 159 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:41:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:22,457 INFO L93 Difference]: Finished difference Result 131 states and 190 transitions. [2021-12-17 21:41:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:41:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2021-12-17 21:41:22,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:22,459 INFO L225 Difference]: With dead ends: 131 [2021-12-17 21:41:22,459 INFO L226 Difference]: Without dead ends: 108 [2021-12-17 21:41:22,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 21:41:22,460 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:22,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:41:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-17 21:41:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-17 21:41:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 97 states have (on average 1.4329896907216495) internal successors, (139), 99 states have internal predecessors, (139), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:41:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 157 transitions. [2021-12-17 21:41:22,473 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 157 transitions. Word has length 76 [2021-12-17 21:41:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:22,474 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 157 transitions. [2021-12-17 21:41:22,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:41:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 157 transitions. [2021-12-17 21:41:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 21:41:22,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:22,475 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 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] [2021-12-17 21:41:22,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-17 21:41:22,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:22,683 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:22,684 INFO L85 PathProgramCache]: Analyzing trace with hash 270007180, now seen corresponding path program 1 times [2021-12-17 21:41:22,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:22,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603149005] [2021-12-17 21:41:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:22,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:22,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:22,685 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) [2021-12-17 21:41:22,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 21:41:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:22,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 21:41:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:24,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:41:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:41:27,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:27,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603149005] [2021-12-17 21:41:27,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603149005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:41:27,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:41:27,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-17 21:41:27,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683972457] [2021-12-17 21:41:27,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:41:27,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 21:41:27,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:27,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 21:41:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-17 21:41:27,354 INFO L87 Difference]: Start difference. First operand 108 states and 157 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:37,493 INFO L93 Difference]: Finished difference Result 357 states and 514 transitions. [2021-12-17 21:41:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 21:41:37,494 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 78 [2021-12-17 21:41:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:37,496 INFO L225 Difference]: With dead ends: 357 [2021-12-17 21:41:37,496 INFO L226 Difference]: Without dead ends: 257 [2021-12-17 21:41:37,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=729, Invalid=1433, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 21:41:37,498 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 641 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:37,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 1552 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-17 21:41:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-17 21:41:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 134. [2021-12-17 21:41:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 123 states have (on average 1.4796747967479675) internal successors, (182), 125 states have internal predecessors, (182), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:41:37,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 200 transitions. [2021-12-17 21:41:37,515 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 200 transitions. Word has length 78 [2021-12-17 21:41:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:37,515 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 200 transitions. [2021-12-17 21:41:37,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 200 transitions. [2021-12-17 21:41:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 21:41:37,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:37,517 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 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] [2021-12-17 21:41:37,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:37,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:37,727 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1407699605, now seen corresponding path program 1 times [2021-12-17 21:41:37,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209152498] [2021-12-17 21:41:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:37,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:37,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:37,730 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) [2021-12-17 21:41:37,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 21:41:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:37,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 21:41:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:39,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:41:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:41:43,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:43,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209152498] [2021-12-17 21:41:43,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209152498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:41:43,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:41:43,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-12-17 21:41:43,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857865408] [2021-12-17 21:41:43,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:41:43,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 21:41:43,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 21:41:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 21:41:43,522 INFO L87 Difference]: Start difference. First operand 134 states and 200 transitions. Second operand has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:53,086 INFO L93 Difference]: Finished difference Result 358 states and 520 transitions. [2021-12-17 21:41:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 21:41:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2021-12-17 21:41:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:53,089 INFO L225 Difference]: With dead ends: 358 [2021-12-17 21:41:53,089 INFO L226 Difference]: Without dead ends: 232 [2021-12-17 21:41:53,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=991, Invalid=2315, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 21:41:53,091 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 702 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:53,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 1761 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-17 21:41:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-17 21:41:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 138. [2021-12-17 21:41:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 127 states have (on average 1.4881889763779528) internal successors, (189), 129 states have internal predecessors, (189), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:41:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 207 transitions. [2021-12-17 21:41:53,104 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 207 transitions. Word has length 89 [2021-12-17 21:41:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:53,104 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 207 transitions. [2021-12-17 21:41:53,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:41:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 207 transitions. [2021-12-17 21:41:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 21:41:53,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:53,108 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 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] [2021-12-17 21:41:53,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:53,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:53,318 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1851209972, now seen corresponding path program 2 times [2021-12-17 21:41:53,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:53,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51092570] [2021-12-17 21:41:53,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 21:41:53,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:53,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:53,321 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) [2021-12-17 21:41:53,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-17 21:41:53,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 21:41:53,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 21:41:53,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:41:53,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-12-17 21:41:53,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:41:53,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:41:53,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51092570] [2021-12-17 21:41:53,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51092570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:41:53,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:41:53,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:41:53,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736082986] [2021-12-17 21:41:53,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:41:53,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:41:53,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:41:53,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:41:53,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:41:53,673 INFO L87 Difference]: Start difference. First operand 138 states and 207 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:41:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:53,939 INFO L93 Difference]: Finished difference Result 164 states and 242 transitions. [2021-12-17 21:41:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:41:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 114 [2021-12-17 21:41:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:53,941 INFO L225 Difference]: With dead ends: 164 [2021-12-17 21:41:53,941 INFO L226 Difference]: Without dead ends: 159 [2021-12-17 21:41:53,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:41:53,942 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 60 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:53,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 184 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:41:53,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-17 21:41:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2021-12-17 21:41:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 134 states have internal predecessors, (195), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:41:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 213 transitions. [2021-12-17 21:41:53,959 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 213 transitions. Word has length 114 [2021-12-17 21:41:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:53,960 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 213 transitions. [2021-12-17 21:41:53,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:41:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 213 transitions. [2021-12-17 21:41:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 21:41:53,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:53,961 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 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] [2021-12-17 21:41:53,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-17 21:41:54,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:41:54,171 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash -133940046, now seen corresponding path program 1 times [2021-12-17 21:41:54,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:41:54,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248154541] [2021-12-17 21:41:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:54,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:41:54,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:41:54,174 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) [2021-12-17 21:41:54,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 21:41:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:54,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 21:41:54,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:41:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:41:58,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:42:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:42:07,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:42:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248154541] [2021-12-17 21:42:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248154541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:42:07,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:42:07,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-17 21:42:07,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355986553] [2021-12-17 21:42:07,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:42:07,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 21:42:07,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:42:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 21:42:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 21:42:07,799 INFO L87 Difference]: Start difference. First operand 143 states and 213 transitions. Second operand has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:42:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:42:49,986 INFO L93 Difference]: Finished difference Result 601 states and 878 transitions. [2021-12-17 21:42:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-17 21:42:49,992 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2021-12-17 21:42:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:42:49,995 INFO L225 Difference]: With dead ends: 601 [2021-12-17 21:42:49,995 INFO L226 Difference]: Without dead ends: 466 [2021-12-17 21:42:49,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=2901, Invalid=6029, Unknown=0, NotChecked=0, Total=8930 [2021-12-17 21:42:49,998 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 2354 mSDsluCounter, 4951 mSDsCounter, 0 mSdLazyCounter, 4195 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2354 SdHoareTripleChecker+Valid, 5161 SdHoareTripleChecker+Invalid, 4540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 4195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:42:49,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2354 Valid, 5161 Invalid, 4540 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [345 Valid, 4195 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time] [2021-12-17 21:42:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-17 21:42:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 211. [2021-12-17 21:42:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 200 states have (on average 1.54) internal successors, (308), 202 states have internal predecessors, (308), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:42:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 326 transitions. [2021-12-17 21:42:50,025 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 326 transitions. Word has length 116 [2021-12-17 21:42:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:42:50,026 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 326 transitions. [2021-12-17 21:42:50,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:42:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 326 transitions. [2021-12-17 21:42:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 21:42:50,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:42:50,028 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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] [2021-12-17 21:42:50,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-17 21:42:50,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:42:50,239 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:42:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:42:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1556286225, now seen corresponding path program 1 times [2021-12-17 21:42:50,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:42:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110977096] [2021-12-17 21:42:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:42:50,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:42:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:42:50,241 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) [2021-12-17 21:42:50,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-17 21:42:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:42:50,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 21:42:50,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:42:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-12-17 21:42:50,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:42:50,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:42:50,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110977096] [2021-12-17 21:42:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110977096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:42:50,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:42:50,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:42:50,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712654729] [2021-12-17 21:42:50,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:42:50,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:42:50,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:42:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:42:50,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:42:50,569 INFO L87 Difference]: Start difference. First operand 211 states and 326 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:42:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:42:50,759 INFO L93 Difference]: Finished difference Result 224 states and 340 transitions. [2021-12-17 21:42:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:42:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 121 [2021-12-17 21:42:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:42:50,769 INFO L225 Difference]: With dead ends: 224 [2021-12-17 21:42:50,769 INFO L226 Difference]: Without dead ends: 218 [2021-12-17 21:42:50,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:42:50,770 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 16 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:42:50,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 237 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:42:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-17 21:42:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2021-12-17 21:42:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 205 states have (on average 1.5317073170731708) internal successors, (314), 207 states have internal predecessors, (314), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:42:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 332 transitions. [2021-12-17 21:42:50,797 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 332 transitions. Word has length 121 [2021-12-17 21:42:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:42:50,797 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 332 transitions. [2021-12-17 21:42:50,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:42:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 332 transitions. [2021-12-17 21:42:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 21:42:50,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:42:50,799 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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] [2021-12-17 21:42:50,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-17 21:42:51,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:42:51,013 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:42:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:42:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1613544527, now seen corresponding path program 1 times [2021-12-17 21:42:51,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:42:51,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607125902] [2021-12-17 21:42:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:42:51,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:42:51,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:42:51,015 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) [2021-12-17 21:42:51,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 21:42:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:42:51,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:42:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:42:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-12-17 21:42:51,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:42:51,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:42:51,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607125902] [2021-12-17 21:42:51,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607125902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:42:51,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:42:51,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:42:51,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071609197] [2021-12-17 21:42:51,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:42:51,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:42:51,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:42:51,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:42:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:42:51,356 INFO L87 Difference]: Start difference. First operand 216 states and 332 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:42:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:42:51,529 INFO L93 Difference]: Finished difference Result 222 states and 337 transitions. [2021-12-17 21:42:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:42:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 121 [2021-12-17 21:42:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:42:51,532 INFO L225 Difference]: With dead ends: 222 [2021-12-17 21:42:51,532 INFO L226 Difference]: Without dead ends: 204 [2021-12-17 21:42:51,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:42:51,533 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:42:51,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 308 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:42:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-17 21:42:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-12-17 21:42:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 193 states have (on average 1.549222797927461) internal successors, (299), 196 states have internal predecessors, (299), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 21:42:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 314 transitions. [2021-12-17 21:42:51,546 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 314 transitions. Word has length 121 [2021-12-17 21:42:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:42:51,546 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 314 transitions. [2021-12-17 21:42:51,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:42:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 314 transitions. [2021-12-17 21:42:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:42:51,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:42:51,548 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-17 21:42:51,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-17 21:42:51,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:42:51,759 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:42:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:42:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1975165408, now seen corresponding path program 1 times [2021-12-17 21:42:51,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:42:51,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795883140] [2021-12-17 21:42:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:42:51,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:42:51,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:42:51,761 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) [2021-12-17 21:42:51,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-17 21:42:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:42:51,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:42:51,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:42:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-17 21:42:52,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:42:52,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:42:52,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795883140] [2021-12-17 21:42:52,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795883140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:42:52,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:42:52,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:42:52,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174968889] [2021-12-17 21:42:52,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:42:52,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:42:52,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:42:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:42:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:42:52,070 INFO L87 Difference]: Start difference. First operand 204 states and 314 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:42:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:42:52,164 INFO L93 Difference]: Finished difference Result 230 states and 347 transitions. [2021-12-17 21:42:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:42:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 123 [2021-12-17 21:42:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:42:52,166 INFO L225 Difference]: With dead ends: 230 [2021-12-17 21:42:52,166 INFO L226 Difference]: Without dead ends: 204 [2021-12-17 21:42:52,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:42:52,167 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:42:52,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:42:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-17 21:42:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-12-17 21:42:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 193 states have (on average 1.544041450777202) internal successors, (298), 196 states have internal predecessors, (298), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 21:42:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 313 transitions. [2021-12-17 21:42:52,184 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 313 transitions. Word has length 123 [2021-12-17 21:42:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:42:52,184 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 313 transitions. [2021-12-17 21:42:52,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:42:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 313 transitions. [2021-12-17 21:42:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 21:42:52,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:42:52,186 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-17 21:42:52,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-17 21:42:52,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:42:52,397 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:42:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:42:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1388359394, now seen corresponding path program 1 times [2021-12-17 21:42:52,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:42:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339135192] [2021-12-17 21:42:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:42:52,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:42:52,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:42:52,400 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) [2021-12-17 21:42:52,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-17 21:42:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:42:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:42:52,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:42:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-17 21:42:52,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:42:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-17 21:42:53,473 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:42:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339135192] [2021-12-17 21:42:53,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339135192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:42:53,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:42:53,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-17 21:42:53,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550602880] [2021-12-17 21:42:53,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:42:53,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:42:53,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:42:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:42:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:42:53,475 INFO L87 Difference]: Start difference. First operand 204 states and 313 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:42:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:42:53,693 INFO L93 Difference]: Finished difference Result 209 states and 317 transitions. [2021-12-17 21:42:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:42:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 123 [2021-12-17 21:42:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:42:53,695 INFO L225 Difference]: With dead ends: 209 [2021-12-17 21:42:53,695 INFO L226 Difference]: Without dead ends: 200 [2021-12-17 21:42:53,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:42:53,696 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:42:53,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 249 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:42:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-17 21:42:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-12-17 21:42:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 188 states have (on average 1.5425531914893618) internal successors, (290), 191 states have internal predecessors, (290), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 21:42:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 305 transitions. [2021-12-17 21:42:53,716 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 305 transitions. Word has length 123 [2021-12-17 21:42:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:42:53,716 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 305 transitions. [2021-12-17 21:42:53,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:42:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 305 transitions. [2021-12-17 21:42:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 21:42:53,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:42:53,718 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-17 21:42:53,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-17 21:42:53,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:42:53,929 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:42:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:42:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash 564140262, now seen corresponding path program 1 times [2021-12-17 21:42:53,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:42:53,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152641668] [2021-12-17 21:42:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:42:53,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:42:53,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:42:53,931 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) [2021-12-17 21:42:53,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-17 21:42:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:42:53,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:42:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:42:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-17 21:42:54,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:42:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-17 21:42:54,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:42:54,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152641668] [2021-12-17 21:42:54,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152641668] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:42:54,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:42:54,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-17 21:42:54,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770091891] [2021-12-17 21:42:54,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:42:54,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:42:54,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:42:54,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:42:54,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:42:54,981 INFO L87 Difference]: Start difference. First operand 199 states and 305 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:42:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:42:55,460 INFO L93 Difference]: Finished difference Result 226 states and 338 transitions. [2021-12-17 21:42:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 21:42:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 126 [2021-12-17 21:42:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:42:55,462 INFO L225 Difference]: With dead ends: 226 [2021-12-17 21:42:55,462 INFO L226 Difference]: Without dead ends: 196 [2021-12-17 21:42:55,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:42:55,463 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:42:55,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 391 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:42:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-17 21:42:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-12-17 21:42:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 188 states have internal predecessors, (242), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-17 21:42:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 254 transitions. [2021-12-17 21:42:55,474 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 254 transitions. Word has length 126 [2021-12-17 21:42:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:42:55,475 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 254 transitions. [2021-12-17 21:42:55,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:42:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 254 transitions. [2021-12-17 21:42:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-17 21:42:55,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:42:55,477 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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] [2021-12-17 21:42:55,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-17 21:42:55,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:42:55,688 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:42:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:42:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash 300411547, now seen corresponding path program 2 times [2021-12-17 21:42:55,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:42:55,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116715677] [2021-12-17 21:42:55,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 21:42:55,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:42:55,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:42:55,690 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) [2021-12-17 21:42:55,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-17 21:42:55,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 21:42:55,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 21:42:55,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 21:42:55,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:42:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-12-17 21:42:56,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:42:57,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:42:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116715677] [2021-12-17 21:42:57,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116715677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:42:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367582593] [2021-12-17 21:42:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 21:42:57,183 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 21:42:57,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 21:42:57,185 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 21:42:57,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-17 21:42:57,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 21:42:57,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 21:42:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 21:42:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:42:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-12-17 21:42:57,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:42:58,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367582593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:42:58,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:42:58,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-17 21:42:58,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150994918] [2021-12-17 21:42:58,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:42:58,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:42:58,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:42:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:42:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:42:58,488 INFO L87 Difference]: Start difference. First operand 196 states and 254 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:42:58,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:42:58,913 INFO L93 Difference]: Finished difference Result 197 states and 255 transitions. [2021-12-17 21:42:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:42:58,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 130 [2021-12-17 21:42:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:42:58,914 INFO L225 Difference]: With dead ends: 197 [2021-12-17 21:42:58,914 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 21:42:58,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:42:58,916 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:42:58,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 212 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:42:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 21:42:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 21:42:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:42:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 21:42:58,917 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2021-12-17 21:42:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:42:58,917 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 21:42:58,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:42:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 21:42:58,920 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 21:42:58,922 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-17 21:42:58,922 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 21:42:58,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-12-17 21:42:59,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-17 21:42:59,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:42:59,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. Killed by 15