./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:06:40,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:06:40,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:06:40,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:06:40,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:06:40,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:06:40,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:06:40,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:06:40,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:06:40,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:06:40,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:06:40,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:06:40,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:06:40,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:06:40,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:06:40,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:06:40,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:06:40,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:06:40,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:06:40,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:06:40,817 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:06:40,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:06:40,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:06:40,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:06:40,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:06:40,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:06:40,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:06:40,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:06:40,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:06:40,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:06:40,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:06:40,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:06:40,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:06:40,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:06:40,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:06:40,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:06:40,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:06:40,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:06:40,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:06:40,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:06:40,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:06:40,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:06:40,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:06:40,857 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:06:40,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:06:40,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:06:40,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:06:40,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:06:40,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:06:40,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:06:40,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:06:40,859 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:06:40,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:06:40,860 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:06:40,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:06:40,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:06:40,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:06:40,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:06:40,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:06:40,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:06:40,861 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:06:40,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:06:40,861 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:06:40,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:06:40,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:06:40,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:06:40,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:06:40,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:06:40,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:06:40,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:06:40,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:06:40,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:06:40,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:06:40,863 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:06:40,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:06:40,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:06:40,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce [2022-07-22 21:06:41,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:06:41,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:06:41,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:06:41,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:06:41,055 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:06:41,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-22 21:06:41,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a84f9d51/f6d530c9c7cd46328150525b807c830e/FLAG85644895b [2022-07-22 21:06:41,484 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:06:41,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-22 21:06:41,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a84f9d51/f6d530c9c7cd46328150525b807c830e/FLAG85644895b [2022-07-22 21:06:41,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a84f9d51/f6d530c9c7cd46328150525b807c830e [2022-07-22 21:06:41,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:06:41,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:06:41,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:06:41,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:06:41,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:06:41,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aac38b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41, skipping insertion in model container [2022-07-22 21:06:41,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:06:41,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:06:41,663 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-22 21:06:41,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-22 21:06:41,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:06:41,710 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:06:41,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-22 21:06:41,720 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-22 21:06:41,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:06:41,751 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:06:41,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41 WrapperNode [2022-07-22 21:06:41,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:06:41,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:06:41,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:06:41,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:06:41,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,784 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 235 [2022-07-22 21:06:41,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:06:41,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:06:41,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:06:41,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:06:41,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:06:41,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:06:41,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:06:41,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:06:41,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (1/1) ... [2022-07-22 21:06:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:06:41,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:06:41,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:06:41,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:06:41,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:06:41,902 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 21:06:41,902 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 21:06:41,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:06:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:06:41,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:06:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 21:06:41,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 21:06:42,008 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:06:42,009 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:06:42,301 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:06:42,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:06:42,306 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:06:42,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:06:42 BoogieIcfgContainer [2022-07-22 21:06:42,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:06:42,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:06:42,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:06:42,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:06:42,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:06:41" (1/3) ... [2022-07-22 21:06:42,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e9bc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:06:42, skipping insertion in model container [2022-07-22 21:06:42,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:41" (2/3) ... [2022-07-22 21:06:42,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e9bc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:06:42, skipping insertion in model container [2022-07-22 21:06:42,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:06:42" (3/3) ... [2022-07-22 21:06:42,314 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-2a.c.cil.c [2022-07-22 21:06:42,324 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:06:42,324 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:06:42,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:06:42,372 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6468cfb1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f6ec882 [2022-07-22 21:06:42,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:06:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 106 states have internal predecessors, (174), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 21:06:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:06:42,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:06:42,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:06:42,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:06:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:06:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash -685161840, now seen corresponding path program 1 times [2022-07-22 21:06:42,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:06:42,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431189867] [2022-07-22 21:06:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:06:42,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:06:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:06:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:06:42,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:06:42,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431189867] [2022-07-22 21:06:42,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431189867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:06:42,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:06:42,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:06:42,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279719016] [2022-07-22 21:06:42,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:06:42,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:06:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:06:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:06:42,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:06:42,528 INFO L87 Difference]: Start difference. First operand has 115 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 106 states have internal predecessors, (174), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:06:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:06:42,549 INFO L93 Difference]: Finished difference Result 225 states and 380 transitions. [2022-07-22 21:06:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:06:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:06:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:06:42,557 INFO L225 Difference]: With dead ends: 225 [2022-07-22 21:06:42,557 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 21:06:42,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:06:42,561 INFO L413 NwaCegarLoop]: 169 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, 169 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 21:06:42,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 21:06:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 21:06:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-22 21:06:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.5104166666666667) internal successors, (145), 99 states have internal predecessors, (145), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:06:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2022-07-22 21:06:42,590 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 7 [2022-07-22 21:06:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:06:42,591 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2022-07-22 21:06:42,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:06:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2022-07-22 21:06:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:06:42,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:06:42,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:06:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:06:42,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:06:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:06:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash -685102258, now seen corresponding path program 1 times [2022-07-22 21:06:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:06:42,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567731065] [2022-07-22 21:06:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:06:42,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:06:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:06:42,606 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:06:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:06:42,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:06:42,623 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:06:42,624 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-22 21:06:42,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:06:42,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:06:42,628 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:06:42,630 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:06:42,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:06:42 BoogieIcfgContainer [2022-07-22 21:06:42,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:06:42,643 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:06:42,644 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:06:42,644 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:06:42,644 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:06:42" (3/4) ... [2022-07-22 21:06:42,646 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 21:06:42,646 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:06:42,647 INFO L158 Benchmark]: Toolchain (without parser) took 1144.47ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 58.6MB in the beginning and 58.3MB in the end (delta: 243.7kB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2022-07-22 21:06:42,647 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 92.3MB. Free memory was 46.3MB in the beginning and 46.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:06:42,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.34ms. Allocated memory is still 92.3MB. Free memory was 58.4MB in the beginning and 62.6MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 21:06:42,648 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.71ms. Allocated memory is still 92.3MB. Free memory was 62.6MB in the beginning and 60.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:06:42,648 INFO L158 Benchmark]: Boogie Preprocessor took 24.47ms. Allocated memory is still 92.3MB. Free memory was 60.0MB in the beginning and 58.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:06:42,648 INFO L158 Benchmark]: RCFGBuilder took 497.89ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 58.2MB in the beginning and 84.6MB in the end (delta: -26.4MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. [2022-07-22 21:06:42,649 INFO L158 Benchmark]: TraceAbstraction took 333.63ms. Allocated memory is still 115.3MB. Free memory was 84.0MB in the beginning and 58.3MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-07-22 21:06:42,649 INFO L158 Benchmark]: Witness Printer took 2.65ms. Allocated memory is still 115.3MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:06:42,651 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 92.3MB. Free memory was 46.3MB in the beginning and 46.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.34ms. Allocated memory is still 92.3MB. Free memory was 58.4MB in the beginning and 62.6MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.71ms. Allocated memory is still 92.3MB. Free memory was 62.6MB in the beginning and 60.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.47ms. Allocated memory is still 92.3MB. Free memory was 60.0MB in the beginning and 58.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 497.89ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 58.2MB in the beginning and 84.6MB in the end (delta: -26.4MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. * TraceAbstraction took 333.63ms. Allocated memory is still 115.3MB. Free memory was 84.0MB in the beginning and 58.3MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 2.65ms. Allocated memory is still 115.3MB. Free memory is still 58.3MB. 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: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 115 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 169 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, 169 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=115occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-22 21:06:42,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:06:44,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:06:44,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:06:44,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:06:44,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:06:44,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:06:44,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:06:44,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:06:44,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:06:44,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:06:44,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:06:44,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:06:44,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:06:44,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:06:44,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:06:44,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:06:44,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:06:44,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:06:44,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:06:44,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:06:44,507 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:06:44,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:06:44,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:06:44,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:06:44,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:06:44,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:06:44,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:06:44,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:06:44,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:06:44,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:06:44,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:06:44,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:06:44,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:06:44,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:06:44,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:06:44,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:06:44,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:06:44,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:06:44,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:06:44,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:06:44,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:06:44,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:06:44,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 21:06:44,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:06:44,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:06:44,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:06:44,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:06:44,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:06:44,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:06:44,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:06:44,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:06:44,558 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:06:44,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:06:44,558 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:06:44,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:06:44,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:06:44,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:06:44,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:06:44,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:06:44,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 21:06:44,564 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 21:06:44,564 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 21:06:44,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:06:44,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:06:44,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:06:44,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:06:44,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:06:44,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:06:44,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:06:44,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:06:44,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:06:44,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:06:44,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:06:44,566 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 21:06:44,566 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 21:06:44,567 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:06:44,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:06:44,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:06:44,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 21:06:44,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce [2022-07-22 21:06:44,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:06:44,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:06:44,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:06:44,853 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:06:44,853 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:06:44,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-22 21:06:44,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ef460c3/39fab1c7911b4178a622f524d7896ba5/FLAGe013baec0 [2022-07-22 21:06:45,231 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:06:45,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-22 21:06:45,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ef460c3/39fab1c7911b4178a622f524d7896ba5/FLAGe013baec0 [2022-07-22 21:06:45,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ef460c3/39fab1c7911b4178a622f524d7896ba5 [2022-07-22 21:06:45,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:06:45,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:06:45,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:06:45,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:06:45,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:06:45,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c4445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45, skipping insertion in model container [2022-07-22 21:06:45,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:06:45,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:06:45,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-22 21:06:45,833 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-22 21:06:45,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:06:45,889 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:06:45,899 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-22 21:06:45,900 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-22 21:06:45,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:06:45,930 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:06:45,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45 WrapperNode [2022-07-22 21:06:45,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:06:45,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:06:45,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:06:45,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:06:45,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,961 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 165 [2022-07-22 21:06:45,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:06:45,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:06:45,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:06:45,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:06:45,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:06:45,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:06:45,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:06:45,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:06:45,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (1/1) ... [2022-07-22 21:06:45,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:06:46,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:06:46,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:06:46,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:06:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:06:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 21:06:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 21:06:46,040 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 21:06:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:06:46,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:06:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 21:06:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 21:06:46,093 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:06:46,095 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:06:48,590 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:06:48,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:06:48,595 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:06:48,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:06:48 BoogieIcfgContainer [2022-07-22 21:06:48,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:06:48,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:06:48,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:06:48,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:06:48,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:06:45" (1/3) ... [2022-07-22 21:06:48,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577558c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:06:48, skipping insertion in model container [2022-07-22 21:06:48,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:06:45" (2/3) ... [2022-07-22 21:06:48,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577558c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:06:48, skipping insertion in model container [2022-07-22 21:06:48,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:06:48" (3/3) ... [2022-07-22 21:06:48,602 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-2a.c.cil.c [2022-07-22 21:06:48,612 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:06:48,612 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:06:48,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:06:48,648 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37a45021, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@66105797 [2022-07-22 21:06:48,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:06:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 21:06:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:06:48,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:06:48,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:06:48,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:06:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:06:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-07-22 21:06:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:06:48,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560388804] [2022-07-22 21:06:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:06:48,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:06:48,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:06:48,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:06:48,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 21:06:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:06:49,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 21:06:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:06:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:06:49,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:06:49,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:06:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560388804] [2022-07-22 21:06:49,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560388804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:06:49,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:06:49,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:06:49,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290285466] [2022-07-22 21:06:49,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:06:49,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:06:49,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:06:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:06:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:06:49,151 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:06:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:06:49,170 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2022-07-22 21:06:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:06:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:06:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:06:49,177 INFO L225 Difference]: With dead ends: 157 [2022-07-22 21:06:49,177 INFO L226 Difference]: Without dead ends: 74 [2022-07-22 21:06:49,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:06:49,182 INFO L413 NwaCegarLoop]: 116 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, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 21:06:49,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 21:06:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-22 21:06:49,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-07-22 21:06:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:06:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2022-07-22 21:06:49,209 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2022-07-22 21:06:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:06:49,209 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2022-07-22 21:06:49,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:06:49,210 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2022-07-22 21:06:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 21:06:49,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:06:49,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:06:49,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-22 21:06:49,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:06:49,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:06:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:06:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-07-22 21:06:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:06:49,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900720820] [2022-07-22 21:06:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:06:49,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:06:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:06:49,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:06:49,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 21:09:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:02,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:09:02,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:17,728 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-07-22 21:09:50,953 WARN L833 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0)))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1))))) is different from false [2022-07-22 21:09:53,022 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0)))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1))))) is different from true [2022-07-22 21:09:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:09:53,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:09:53,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:53,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900720820] [2022-07-22 21:09:53,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900720820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:09:53,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:09:53,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:09:53,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665255934] [2022-07-22 21:09:53,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:09:53,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:09:53,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:53,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:09:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-07-22 21:09:53,025 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:09:55,515 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 [] [2022-07-22 21:09:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:55,814 INFO L93 Difference]: Finished difference Result 74 states and 107 transitions. [2022-07-22 21:09:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:09:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-22 21:09:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:55,816 INFO L225 Difference]: With dead ends: 74 [2022-07-22 21:09:55,816 INFO L226 Difference]: Without dead ends: 69 [2022-07-22 21:09:55,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-07-22 21:09:55,817 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 103 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:55,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 274 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 209 Unchecked, 2.5s Time] [2022-07-22 21:09:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-22 21:09:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-22 21:09:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 60 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 21:09:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2022-07-22 21:09:55,824 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 7 [2022-07-22 21:09:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:55,824 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2022-07-22 21:09:55,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:09:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2022-07-22 21:09:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 21:09:55,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:55,826 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:55,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:09:56,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:09:56,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:09:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:09:56,041 INFO L85 PathProgramCache]: Analyzing trace with hash -567365317, now seen corresponding path program 1 times [2022-07-22 21:09:56,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:09:56,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701871415] [2022-07-22 21:09:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:09:56,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:09:56,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:09:56,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:09:56,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 21:09:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:56,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:09:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:09:56,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:09:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:09:56,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:56,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701871415] [2022-07-22 21:09:56,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701871415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:09:56,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:09:56,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-22 21:09:56,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226287754] [2022-07-22 21:09:56,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:09:56,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:09:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:56,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:09:56,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:09:56,803 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:09:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:57,258 INFO L93 Difference]: Finished difference Result 162 states and 250 transitions. [2022-07-22 21:09:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:09:57,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-07-22 21:09:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:57,261 INFO L225 Difference]: With dead ends: 162 [2022-07-22 21:09:57,261 INFO L226 Difference]: Without dead ends: 118 [2022-07-22 21:09:57,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:09:57,263 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 58 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:57,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 733 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 21:09:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-22 21:09:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2022-07-22 21:09:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 69 states have internal predecessors, (97), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-22 21:09:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 121 transitions. [2022-07-22 21:09:57,273 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 121 transitions. Word has length 33 [2022-07-22 21:09:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:57,273 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 121 transitions. [2022-07-22 21:09:57,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:09:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 121 transitions. [2022-07-22 21:09:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 21:09:57,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:57,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:57,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-22 21:09:57,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:09:57,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:09:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:09:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1463451301, now seen corresponding path program 1 times [2022-07-22 21:09:57,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:09:57,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940047289] [2022-07-22 21:09:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:09:57,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:09:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:09:57,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:09:57,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 21:09:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:09:57,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:09:57,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:09:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:09:58,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:58,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940047289] [2022-07-22 21:09:58,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940047289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:09:58,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:09:58,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-22 21:09:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312458611] [2022-07-22 21:09:58,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:09:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:09:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:09:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:09:58,154 INFO L87 Difference]: Start difference. First operand 81 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:09:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:58,731 INFO L93 Difference]: Finished difference Result 179 states and 273 transitions. [2022-07-22 21:09:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:09:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-07-22 21:09:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:58,733 INFO L225 Difference]: With dead ends: 179 [2022-07-22 21:09:58,733 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 21:09:58,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:09:58,734 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 56 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:58,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 456 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 21:09:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 21:09:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-07-22 21:09:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 105 states have internal predecessors, (148), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (22), 18 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-22 21:09:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 186 transitions. [2022-07-22 21:09:58,743 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 186 transitions. Word has length 37 [2022-07-22 21:09:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:58,744 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 186 transitions. [2022-07-22 21:09:58,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:09:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 186 transitions. [2022-07-22 21:09:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 21:09:58,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:58,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:58,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:09:58,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:09:58,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:09:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:09:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1205285863, now seen corresponding path program 1 times [2022-07-22 21:09:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:09:58,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100304516] [2022-07-22 21:09:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:09:58,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:09:58,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:09:58,951 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:09:58,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 21:09:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:09:58,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:09:58,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:09:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:09:59,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:09:59,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:09:59,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100304516] [2022-07-22 21:09:59,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100304516] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:09:59,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:09:59,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:09:59,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67645730] [2022-07-22 21:09:59,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:09:59,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:09:59,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:09:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:09:59,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:09:59,307 INFO L87 Difference]: Start difference. First operand 124 states and 186 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:09:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:09:59,881 INFO L93 Difference]: Finished difference Result 280 states and 423 transitions. [2022-07-22 21:09:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:09:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-22 21:09:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:09:59,883 INFO L225 Difference]: With dead ends: 280 [2022-07-22 21:09:59,884 INFO L226 Difference]: Without dead ends: 210 [2022-07-22 21:09:59,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:09:59,887 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 53 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:09:59,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 453 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 21:09:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-22 21:09:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2022-07-22 21:09:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 178 states have (on average 1.4157303370786516) internal successors, (252), 177 states have internal predecessors, (252), 24 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2022-07-22 21:09:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 306 transitions. [2022-07-22 21:09:59,919 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 306 transitions. Word has length 37 [2022-07-22 21:09:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:09:59,920 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 306 transitions. [2022-07-22 21:09:59,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:09:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 306 transitions. [2022-07-22 21:09:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 21:09:59,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:09:59,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:09:59,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:00,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:00,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash -525227493, now seen corresponding path program 1 times [2022-07-22 21:10:00,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:00,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918036076] [2022-07-22 21:10:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:00,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:00,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:00,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:00,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 21:10:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:10:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:00,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:00,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:00,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918036076] [2022-07-22 21:10:00,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918036076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:00,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:00,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:10:00,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116447879] [2022-07-22 21:10:00,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:00,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:10:00,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:10:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:10:00,600 INFO L87 Difference]: Start difference. First operand 206 states and 306 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:01,368 INFO L93 Difference]: Finished difference Result 294 states and 440 transitions. [2022-07-22 21:10:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:10:01,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-22 21:10:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:01,370 INFO L225 Difference]: With dead ends: 294 [2022-07-22 21:10:01,370 INFO L226 Difference]: Without dead ends: 230 [2022-07-22 21:10:01,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:10:01,371 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:01,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 539 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 21:10:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-22 21:10:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-07-22 21:10:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 164 states have (on average 1.3902439024390243) internal successors, (228), 163 states have internal predecessors, (228), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-07-22 21:10:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 274 transitions. [2022-07-22 21:10:01,405 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 274 transitions. Word has length 37 [2022-07-22 21:10:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:01,405 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 274 transitions. [2022-07-22 21:10:01,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 274 transitions. [2022-07-22 21:10:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 21:10:01,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:01,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:01,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:01,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1910499068, now seen corresponding path program 1 times [2022-07-22 21:10:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:01,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650192411] [2022-07-22 21:10:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:01,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:01,621 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:01,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 21:10:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:01,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:10:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:02,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:02,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:02,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650192411] [2022-07-22 21:10:02,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650192411] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:02,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:02,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-22 21:10:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965715030] [2022-07-22 21:10:02,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:02,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:10:02,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:10:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:02,661 INFO L87 Difference]: Start difference. First operand 188 states and 274 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:10:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:03,810 INFO L93 Difference]: Finished difference Result 276 states and 410 transitions. [2022-07-22 21:10:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:10:03,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-22 21:10:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:03,812 INFO L225 Difference]: With dead ends: 276 [2022-07-22 21:10:03,812 INFO L226 Difference]: Without dead ends: 238 [2022-07-22 21:10:03,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:10:03,813 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 197 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:03,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 645 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 21:10:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-22 21:10:03,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 179. [2022-07-22 21:10:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 157 states have (on average 1.3821656050955413) internal successors, (217), 156 states have internal predecessors, (217), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-22 21:10:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 259 transitions. [2022-07-22 21:10:03,829 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 259 transitions. Word has length 41 [2022-07-22 21:10:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:03,830 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 259 transitions. [2022-07-22 21:10:03,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:10:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 259 transitions. [2022-07-22 21:10:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 21:10:03,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:03,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:03,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:04,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:04,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1938435092, now seen corresponding path program 1 times [2022-07-22 21:10:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:04,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603066343] [2022-07-22 21:10:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:04,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:04,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:04,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:04,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 21:10:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:04,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:10:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:04,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:04,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:04,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603066343] [2022-07-22 21:10:04,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603066343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:04,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:04,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:10:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582384751] [2022-07-22 21:10:04,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:10:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:10:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:10:04,338 INFO L87 Difference]: Start difference. First operand 179 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:04,513 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-07-22 21:10:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:10:04,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-22 21:10:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:04,515 INFO L225 Difference]: With dead ends: 332 [2022-07-22 21:10:04,515 INFO L226 Difference]: Without dead ends: 266 [2022-07-22 21:10:04,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:04,516 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:04,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 328 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 21:10:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-22 21:10:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2022-07-22 21:10:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 210 states have (on average 1.3428571428571427) internal successors, (282), 209 states have internal predecessors, (282), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-07-22 21:10:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 328 transitions. [2022-07-22 21:10:04,531 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 328 transitions. Word has length 44 [2022-07-22 21:10:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:04,531 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 328 transitions. [2022-07-22 21:10:04,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 328 transitions. [2022-07-22 21:10:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 21:10:04,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:04,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:04,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-22 21:10:04,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:04,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1309251479, now seen corresponding path program 1 times [2022-07-22 21:10:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:04,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976754457] [2022-07-22 21:10:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:04,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:04,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:04,761 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:04,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 21:10:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:10:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:10:04,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:04,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:04,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976754457] [2022-07-22 21:10:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976754457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:04,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:10:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096507209] [2022-07-22 21:10:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:04,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:10:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:10:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:10:04,990 INFO L87 Difference]: Start difference. First operand 234 states and 328 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:10:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:05,352 INFO L93 Difference]: Finished difference Result 409 states and 570 transitions. [2022-07-22 21:10:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:10:05,353 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-07-22 21:10:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:05,354 INFO L225 Difference]: With dead ends: 409 [2022-07-22 21:10:05,354 INFO L226 Difference]: Without dead ends: 179 [2022-07-22 21:10:05,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:05,355 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:05,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 21:10:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-22 21:10:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2022-07-22 21:10:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 151 states have internal predecessors, (194), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-22 21:10:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2022-07-22 21:10:05,362 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 44 [2022-07-22 21:10:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:05,362 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2022-07-22 21:10:05,362 INFO L496 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:10:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2022-07-22 21:10:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 21:10:05,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:05,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:05,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:05,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:05,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:05,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:05,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1643290396, now seen corresponding path program 1 times [2022-07-22 21:10:05,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:05,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79155764] [2022-07-22 21:10:05,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:05,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:05,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:05,574 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:05,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 21:10:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:05,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:10:05,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:06,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:07,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:07,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79155764] [2022-07-22 21:10:07,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79155764] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:10:07,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:10:07,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-22 21:10:07,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898396834] [2022-07-22 21:10:07,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:07,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:10:07,434 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:09,477 INFO L93 Difference]: Finished difference Result 317 states and 456 transitions. [2022-07-22 21:10:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:10:09,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-22 21:10:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:09,479 INFO L225 Difference]: With dead ends: 317 [2022-07-22 21:10:09,479 INFO L226 Difference]: Without dead ends: 281 [2022-07-22 21:10:09,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:10:09,480 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 188 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:09,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 511 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 21:10:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-07-22 21:10:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 205. [2022-07-22 21:10:09,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 183 states have (on average 1.2950819672131149) internal successors, (237), 186 states have internal predecessors, (237), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-22 21:10:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 276 transitions. [2022-07-22 21:10:09,488 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 276 transitions. Word has length 45 [2022-07-22 21:10:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:09,489 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 276 transitions. [2022-07-22 21:10:09,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 276 transitions. [2022-07-22 21:10:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 21:10:09,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:09,489 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:09,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:09,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:09,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash -876669538, now seen corresponding path program 1 times [2022-07-22 21:10:09,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:09,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424642511] [2022-07-22 21:10:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:09,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:09,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:09,709 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:09,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 21:10:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:09,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:10:09,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:09,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:09,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:09,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424642511] [2022-07-22 21:10:09,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424642511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:09,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:09,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:10:09,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990801315] [2022-07-22 21:10:09,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:09,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:10:09,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:10:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:09,929 INFO L87 Difference]: Start difference. First operand 205 states and 276 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:10,124 INFO L93 Difference]: Finished difference Result 212 states and 282 transitions. [2022-07-22 21:10:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:10:10,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-22 21:10:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:10,125 INFO L225 Difference]: With dead ends: 212 [2022-07-22 21:10:10,125 INFO L226 Difference]: Without dead ends: 205 [2022-07-22 21:10:10,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:10,126 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:10,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 381 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 21:10:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-22 21:10:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-07-22 21:10:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 183 states have (on average 1.278688524590164) internal successors, (234), 186 states have internal predecessors, (234), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-22 21:10:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 273 transitions. [2022-07-22 21:10:10,133 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 273 transitions. Word has length 45 [2022-07-22 21:10:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:10,133 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 273 transitions. [2022-07-22 21:10:10,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 273 transitions. [2022-07-22 21:10:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 21:10:10,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:10,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:10,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:10,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:10,343 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash 457064955, now seen corresponding path program 1 times [2022-07-22 21:10:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065070791] [2022-07-22 21:10:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:10,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:10,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:10,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 21:10:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:10,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:10:10,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:10,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:10,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:10,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065070791] [2022-07-22 21:10:10,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065070791] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:10,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:10,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:10:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737525715] [2022-07-22 21:10:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:10,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:10,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:10,886 INFO L87 Difference]: Start difference. First operand 205 states and 273 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:11,286 INFO L93 Difference]: Finished difference Result 248 states and 334 transitions. [2022-07-22 21:10:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:10:11,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-22 21:10:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:11,288 INFO L225 Difference]: With dead ends: 248 [2022-07-22 21:10:11,288 INFO L226 Difference]: Without dead ends: 246 [2022-07-22 21:10:11,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:11,288 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 38 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:11,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 596 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-07-22 21:10:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-22 21:10:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 209. [2022-07-22 21:10:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 189 states have internal predecessors, (237), 17 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-22 21:10:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 276 transitions. [2022-07-22 21:10:11,298 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 276 transitions. Word has length 45 [2022-07-22 21:10:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:11,299 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 276 transitions. [2022-07-22 21:10:11,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 276 transitions. [2022-07-22 21:10:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 21:10:11,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:11,300 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:11,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:11,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:11,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash 514323257, now seen corresponding path program 1 times [2022-07-22 21:10:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:11,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801830939] [2022-07-22 21:10:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:11,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:11,510 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:11,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 21:10:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:11,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:10:11,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:11,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:11,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801830939] [2022-07-22 21:10:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801830939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:11,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:11,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:10:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222438742] [2022-07-22 21:10:11,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:11,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:11,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:11,950 INFO L87 Difference]: Start difference. First operand 209 states and 276 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:12,313 INFO L93 Difference]: Finished difference Result 262 states and 350 transitions. [2022-07-22 21:10:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:10:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-22 21:10:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:12,314 INFO L225 Difference]: With dead ends: 262 [2022-07-22 21:10:12,314 INFO L226 Difference]: Without dead ends: 260 [2022-07-22 21:10:12,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:12,315 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:12,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 469 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-07-22 21:10:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-22 21:10:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 213. [2022-07-22 21:10:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 189 states have (on average 1.2698412698412698) internal successors, (240), 192 states have internal predecessors, (240), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-22 21:10:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 279 transitions. [2022-07-22 21:10:12,325 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 279 transitions. Word has length 45 [2022-07-22 21:10:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:12,325 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 279 transitions. [2022-07-22 21:10:12,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 279 transitions. [2022-07-22 21:10:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 21:10:12,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:12,335 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:12,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:12,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:12,543 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:12,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1895517033, now seen corresponding path program 1 times [2022-07-22 21:10:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:12,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328561288] [2022-07-22 21:10:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:12,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:12,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:12,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:12,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 21:10:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:12,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:10:12,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:12,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:12,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:12,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328561288] [2022-07-22 21:10:12,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328561288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:12,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:12,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:10:12,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688229417] [2022-07-22 21:10:12,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:12,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:10:12,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:10:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:10:12,783 INFO L87 Difference]: Start difference. First operand 213 states and 279 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:12,932 INFO L93 Difference]: Finished difference Result 352 states and 474 transitions. [2022-07-22 21:10:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:10:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-07-22 21:10:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:12,934 INFO L225 Difference]: With dead ends: 352 [2022-07-22 21:10:12,934 INFO L226 Difference]: Without dead ends: 300 [2022-07-22 21:10:12,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:12,934 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 77 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:12,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 315 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 21:10:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-22 21:10:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 232. [2022-07-22 21:10:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 207 states have (on average 1.2753623188405796) internal successors, (264), 209 states have internal predecessors, (264), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (23), 20 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-22 21:10:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 305 transitions. [2022-07-22 21:10:12,950 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 305 transitions. Word has length 46 [2022-07-22 21:10:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:12,950 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 305 transitions. [2022-07-22 21:10:12,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 305 transitions. [2022-07-22 21:10:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 21:10:12,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:12,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:12,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:13,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:13,167 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1657751029, now seen corresponding path program 1 times [2022-07-22 21:10:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:13,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560322817] [2022-07-22 21:10:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:13,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:13,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:13,180 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:13,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 21:10:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:13,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:10:13,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:13,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:13,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560322817] [2022-07-22 21:10:13,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560322817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:13,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:13,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:10:13,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385770239] [2022-07-22 21:10:13,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:13,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:10:13,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:10:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:10:13,356 INFO L87 Difference]: Start difference. First operand 232 states and 305 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:13,472 INFO L93 Difference]: Finished difference Result 247 states and 321 transitions. [2022-07-22 21:10:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:10:13,473 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-22 21:10:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:13,474 INFO L225 Difference]: With dead ends: 247 [2022-07-22 21:10:13,474 INFO L226 Difference]: Without dead ends: 208 [2022-07-22 21:10:13,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:13,476 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:13,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 21:10:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-22 21:10:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-07-22 21:10:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.289617486338798) internal successors, (236), 186 states have internal predecessors, (236), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-22 21:10:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2022-07-22 21:10:13,488 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 49 [2022-07-22 21:10:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:13,489 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2022-07-22 21:10:13,489 INFO L496 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2022-07-22 21:10:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 21:10:13,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:13,490 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:13,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-22 21:10:13,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:13,697 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:13,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1176937396, now seen corresponding path program 1 times [2022-07-22 21:10:13,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:13,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336830565] [2022-07-22 21:10:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:13,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:13,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:13,700 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:13,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-22 21:10:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:10:13,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:13,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:13,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:13,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336830565] [2022-07-22 21:10:13,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336830565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:13,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:13,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:10:13,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240047566] [2022-07-22 21:10:13,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:13,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:10:13,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:10:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:13,985 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:14,601 INFO L93 Difference]: Finished difference Result 335 states and 446 transitions. [2022-07-22 21:10:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:10:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-22 21:10:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:14,602 INFO L225 Difference]: With dead ends: 335 [2022-07-22 21:10:14,602 INFO L226 Difference]: Without dead ends: 293 [2022-07-22 21:10:14,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:10:14,603 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 216 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:14,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 405 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 21:10:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-22 21:10:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 208. [2022-07-22 21:10:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.278688524590164) internal successors, (234), 186 states have internal predecessors, (234), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-22 21:10:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 273 transitions. [2022-07-22 21:10:14,613 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 273 transitions. Word has length 50 [2022-07-22 21:10:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:14,613 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 273 transitions. [2022-07-22 21:10:14,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 273 transitions. [2022-07-22 21:10:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 21:10:14,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:14,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:14,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:14,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:14,823 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash -475872818, now seen corresponding path program 1 times [2022-07-22 21:10:14,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:14,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828626649] [2022-07-22 21:10:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:14,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:14,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:14,825 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:14,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-22 21:10:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:14,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:10:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:14,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:14,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:14,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828626649] [2022-07-22 21:10:14,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828626649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:14,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:14,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:10:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055469436] [2022-07-22 21:10:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:14,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:10:14,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:14,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:10:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:10:14,990 INFO L87 Difference]: Start difference. First operand 208 states and 273 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:15,318 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2022-07-22 21:10:15,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:10:15,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-22 21:10:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:15,320 INFO L225 Difference]: With dead ends: 326 [2022-07-22 21:10:15,320 INFO L226 Difference]: Without dead ends: 295 [2022-07-22 21:10:15,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:15,321 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 113 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:15,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 261 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 21:10:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-22 21:10:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 212. [2022-07-22 21:10:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 187 states have (on average 1.2727272727272727) internal successors, (238), 190 states have internal predecessors, (238), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-22 21:10:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 277 transitions. [2022-07-22 21:10:15,338 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 277 transitions. Word has length 50 [2022-07-22 21:10:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:15,338 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 277 transitions. [2022-07-22 21:10:15,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 277 transitions. [2022-07-22 21:10:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 21:10:15,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:15,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:15,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:15,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:15,547 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash 33068664, now seen corresponding path program 1 times [2022-07-22 21:10:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:15,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236732007] [2022-07-22 21:10:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:15,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:15,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:15,550 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:15,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-22 21:10:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:10:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:16,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:16,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:16,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236732007] [2022-07-22 21:10:16,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236732007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:16,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:16,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:10:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125837688] [2022-07-22 21:10:16,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:16,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:10:16,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:10:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:10:16,028 INFO L87 Difference]: Start difference. First operand 212 states and 277 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:17,825 INFO L93 Difference]: Finished difference Result 328 states and 444 transitions. [2022-07-22 21:10:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:10:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-22 21:10:17,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:17,827 INFO L225 Difference]: With dead ends: 328 [2022-07-22 21:10:17,827 INFO L226 Difference]: Without dead ends: 304 [2022-07-22 21:10:17,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:10:17,827 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 180 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:17,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 578 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 21:10:17,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-22 21:10:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249. [2022-07-22 21:10:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 220 states have (on average 1.268181818181818) internal successors, (279), 224 states have internal predecessors, (279), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-22 21:10:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 326 transitions. [2022-07-22 21:10:17,852 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 326 transitions. Word has length 51 [2022-07-22 21:10:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:17,853 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 326 transitions. [2022-07-22 21:10:17,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 326 transitions. [2022-07-22 21:10:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 21:10:17,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:17,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:17,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:18,054 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:18,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2004133062, now seen corresponding path program 1 times [2022-07-22 21:10:18,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:18,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325199026] [2022-07-22 21:10:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:18,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:18,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:18,056 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:18,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-22 21:10:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:18,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:10:18,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:18,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:18,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:18,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325199026] [2022-07-22 21:10:18,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325199026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:18,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:18,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:10:18,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046886032] [2022-07-22 21:10:18,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:18,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:10:18,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:10:18,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:10:18,331 INFO L87 Difference]: Start difference. First operand 249 states and 326 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:18,479 INFO L93 Difference]: Finished difference Result 302 states and 390 transitions. [2022-07-22 21:10:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:10:18,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-22 21:10:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:18,481 INFO L225 Difference]: With dead ends: 302 [2022-07-22 21:10:18,481 INFO L226 Difference]: Without dead ends: 268 [2022-07-22 21:10:18,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:18,481 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 87 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:18,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 273 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 21:10:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-22 21:10:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 249. [2022-07-22 21:10:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 220 states have (on average 1.2136363636363636) internal successors, (267), 224 states have internal predecessors, (267), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-22 21:10:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2022-07-22 21:10:18,499 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 51 [2022-07-22 21:10:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:18,499 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2022-07-22 21:10:18,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2022-07-22 21:10:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 21:10:18,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:18,500 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:18,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:18,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:18,708 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2071979516, now seen corresponding path program 1 times [2022-07-22 21:10:18,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:18,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168774989] [2022-07-22 21:10:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:18,710 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:18,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-22 21:10:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:10:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:18,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:18,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168774989] [2022-07-22 21:10:18,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168774989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:18,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:18,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:10:18,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035142928] [2022-07-22 21:10:18,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:18,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:10:18,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:10:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:10:18,839 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:18,953 INFO L93 Difference]: Finished difference Result 258 states and 322 transitions. [2022-07-22 21:10:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:10:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-22 21:10:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:18,954 INFO L225 Difference]: With dead ends: 258 [2022-07-22 21:10:18,954 INFO L226 Difference]: Without dead ends: 213 [2022-07-22 21:10:18,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:10:18,955 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:18,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 21:10:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-22 21:10:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2022-07-22 21:10:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 181 states have (on average 1.2209944751381216) internal successors, (221), 186 states have internal predecessors, (221), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 18 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-22 21:10:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 259 transitions. [2022-07-22 21:10:18,963 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 259 transitions. Word has length 51 [2022-07-22 21:10:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:18,963 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 259 transitions. [2022-07-22 21:10:18,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 259 transitions. [2022-07-22 21:10:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 21:10:18,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:18,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:18,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:19,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:19,174 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:19,175 INFO L85 PathProgramCache]: Analyzing trace with hash 447980418, now seen corresponding path program 1 times [2022-07-22 21:10:19,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:19,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163066793] [2022-07-22 21:10:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:19,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:19,177 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:19,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-22 21:10:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:10:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:19,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:10:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:10:20,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:20,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163066793] [2022-07-22 21:10:20,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163066793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:10:20,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:10:20,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-22 21:10:20,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819430451] [2022-07-22 21:10:20,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:10:20,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:10:20,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:20,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:10:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:10:20,353 INFO L87 Difference]: Start difference. First operand 207 states and 259 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:10:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:21,060 INFO L93 Difference]: Finished difference Result 232 states and 286 transitions. [2022-07-22 21:10:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:10:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-07-22 21:10:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:21,063 INFO L225 Difference]: With dead ends: 232 [2022-07-22 21:10:21,063 INFO L226 Difference]: Without dead ends: 201 [2022-07-22 21:10:21,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:10:21,064 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 78 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:21,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 566 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 21:10:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-22 21:10:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 185. [2022-07-22 21:10:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 159 states have (on average 1.2264150943396226) internal successors, (195), 165 states have internal predecessors, (195), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-22 21:10:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2022-07-22 21:10:21,079 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 51 [2022-07-22 21:10:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:21,079 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2022-07-22 21:10:21,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 21:10:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2022-07-22 21:10:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 21:10:21,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:21,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:21,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:21,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:21,289 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:21,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:21,289 INFO L85 PathProgramCache]: Analyzing trace with hash -826993692, now seen corresponding path program 1 times [2022-07-22 21:10:21,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:21,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326260491] [2022-07-22 21:10:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:21,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:21,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:21,291 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:21,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-22 21:10:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:21,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:10:21,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 21:10:21,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:21,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:21,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326260491] [2022-07-22 21:10:21,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326260491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:21,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:21,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:10:21,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938220394] [2022-07-22 21:10:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:21,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:21,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:21,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:21,637 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:22,865 INFO L93 Difference]: Finished difference Result 271 states and 349 transitions. [2022-07-22 21:10:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:10:22,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-07-22 21:10:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:22,866 INFO L225 Difference]: With dead ends: 271 [2022-07-22 21:10:22,866 INFO L226 Difference]: Without dead ends: 222 [2022-07-22 21:10:22,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:10:22,867 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 89 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:22,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 532 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 21:10:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-22 21:10:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 159. [2022-07-22 21:10:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 139 states have internal predecessors, (166), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 21:10:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2022-07-22 21:10:22,875 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 53 [2022-07-22 21:10:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:22,875 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2022-07-22 21:10:22,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 21:10:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2022-07-22 21:10:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 21:10:22,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:22,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:22,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:23,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:23,083 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash 841846950, now seen corresponding path program 1 times [2022-07-22 21:10:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373884195] [2022-07-22 21:10:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:23,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:23,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:23,086 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:23,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-22 21:10:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:23,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:10:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:30,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:30,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:30,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373884195] [2022-07-22 21:10:30,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373884195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:30,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:30,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:10:30,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459729087] [2022-07-22 21:10:30,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:30,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:10:30,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:10:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:30,184 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:30,342 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2022-07-22 21:10:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:10:30,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-07-22 21:10:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:30,343 INFO L225 Difference]: With dead ends: 168 [2022-07-22 21:10:30,343 INFO L226 Difference]: Without dead ends: 166 [2022-07-22 21:10:30,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:10:30,344 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 9 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:30,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 422 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-07-22 21:10:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-22 21:10:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-07-22 21:10:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 145 states have internal predecessors, (169), 23 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 21:10:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 213 transitions. [2022-07-22 21:10:30,353 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 213 transitions. Word has length 55 [2022-07-22 21:10:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:30,353 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 213 transitions. [2022-07-22 21:10:30,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 213 transitions. [2022-07-22 21:10:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 21:10:30,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:30,354 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:30,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:30,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:30,562 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:30,563 INFO L85 PathProgramCache]: Analyzing trace with hash 12170841, now seen corresponding path program 1 times [2022-07-22 21:10:30,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:30,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855552549] [2022-07-22 21:10:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:30,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:30,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:30,579 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:30,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-22 21:10:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:10:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:37,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:37,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:37,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855552549] [2022-07-22 21:10:37,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855552549] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:37,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:37,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:10:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691261931] [2022-07-22 21:10:37,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:37,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:10:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:10:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=37, Unknown=3, NotChecked=0, Total=56 [2022-07-22 21:10:37,649 INFO L87 Difference]: Start difference. First operand 166 states and 213 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:37,805 INFO L93 Difference]: Finished difference Result 213 states and 272 transitions. [2022-07-22 21:10:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:10:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-07-22 21:10:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:37,806 INFO L225 Difference]: With dead ends: 213 [2022-07-22 21:10:37,806 INFO L226 Difference]: Without dead ends: 211 [2022-07-22 21:10:37,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=20, Invalid=49, Unknown=3, NotChecked=0, Total=72 [2022-07-22 21:10:37,807 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 37 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:37,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 548 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-07-22 21:10:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-22 21:10:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2022-07-22 21:10:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 142 states have internal predecessors, (169), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 21:10:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 207 transitions. [2022-07-22 21:10:37,827 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 207 transitions. Word has length 56 [2022-07-22 21:10:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:37,827 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 207 transitions. [2022-07-22 21:10:37,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 207 transitions. [2022-07-22 21:10:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 21:10:37,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:37,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:37,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:38,029 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash 590846065, now seen corresponding path program 1 times [2022-07-22 21:10:38,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:38,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707454570] [2022-07-22 21:10:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:38,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:38,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:38,031 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:38,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-22 21:10:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:10:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:40,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:40,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:40,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707454570] [2022-07-22 21:10:40,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707454570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:40,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:40,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 21:10:40,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724588420] [2022-07-22 21:10:40,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:40,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:10:40,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:10:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:10:40,036 INFO L87 Difference]: Start difference. First operand 163 states and 207 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-07-22 21:10:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:45,907 INFO L93 Difference]: Finished difference Result 238 states and 304 transitions. [2022-07-22 21:10:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:10:45,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 59 [2022-07-22 21:10:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:45,924 INFO L225 Difference]: With dead ends: 238 [2022-07-22 21:10:45,924 INFO L226 Difference]: Without dead ends: 226 [2022-07-22 21:10:45,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:10:45,925 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 164 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:45,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1081 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-22 21:10:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-22 21:10:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 163. [2022-07-22 21:10:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2279411764705883) internal successors, (167), 142 states have internal predecessors, (167), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 21:10:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 205 transitions. [2022-07-22 21:10:45,953 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 205 transitions. Word has length 59 [2022-07-22 21:10:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:45,954 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 205 transitions. [2022-07-22 21:10:45,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-07-22 21:10:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 205 transitions. [2022-07-22 21:10:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 21:10:45,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:45,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:45,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:46,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:46,163 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -407457257, now seen corresponding path program 1 times [2022-07-22 21:10:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255049537] [2022-07-22 21:10:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:46,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:46,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:46,166 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:46,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-22 21:10:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:10:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:46,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:46,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:46,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255049537] [2022-07-22 21:10:46,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255049537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:46,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:46,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:10:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588997329] [2022-07-22 21:10:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:46,453 INFO L87 Difference]: Start difference. First operand 163 states and 205 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2022-07-22 21:10:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:46,853 INFO L93 Difference]: Finished difference Result 182 states and 225 transitions. [2022-07-22 21:10:46,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:10:46,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 61 [2022-07-22 21:10:46,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:46,855 INFO L225 Difference]: With dead ends: 182 [2022-07-22 21:10:46,855 INFO L226 Difference]: Without dead ends: 180 [2022-07-22 21:10:46,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:46,856 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 40 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:46,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 504 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 21:10:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-22 21:10:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2022-07-22 21:10:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 139 states have (on average 1.223021582733813) internal successors, (170), 145 states have internal predecessors, (170), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 21:10:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 208 transitions. [2022-07-22 21:10:46,869 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 208 transitions. Word has length 61 [2022-07-22 21:10:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:46,869 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 208 transitions. [2022-07-22 21:10:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2022-07-22 21:10:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 208 transitions. [2022-07-22 21:10:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 21:10:46,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:46,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:46,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:47,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:47,079 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:47,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1933907116, now seen corresponding path program 1 times [2022-07-22 21:10:47,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:47,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376303402] [2022-07-22 21:10:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:47,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:47,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:47,097 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:47,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-22 21:10:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:47,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 21:10:47,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:48,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:48,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:48,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376303402] [2022-07-22 21:10:48,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376303402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:48,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 21:10:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210024543] [2022-07-22 21:10:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:48,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:10:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:10:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:10:48,777 INFO L87 Difference]: Start difference. First operand 167 states and 208 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:55,613 INFO L93 Difference]: Finished difference Result 432 states and 559 transitions. [2022-07-22 21:10:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:10:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-07-22 21:10:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:55,615 INFO L225 Difference]: With dead ends: 432 [2022-07-22 21:10:55,615 INFO L226 Difference]: Without dead ends: 400 [2022-07-22 21:10:55,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:10:55,615 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 460 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:55,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1007 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-07-22 21:10:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-07-22 21:10:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 197. [2022-07-22 21:10:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 173 states have internal predecessors, (200), 23 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 21:10:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2022-07-22 21:10:55,638 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 61 [2022-07-22 21:10:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:55,639 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2022-07-22 21:10:55,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 21:10:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2022-07-22 21:10:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 21:10:55,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:55,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:55,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:55,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:55,848 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash -131344237, now seen corresponding path program 1 times [2022-07-22 21:10:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:55,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604083126] [2022-07-22 21:10:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:55,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:55,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:55,851 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:55,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-22 21:10:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:10:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:10:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:10:56,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:10:56,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:10:56,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604083126] [2022-07-22 21:10:56,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604083126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:10:56,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:10:56,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:10:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946952645] [2022-07-22 21:10:56,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:10:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:10:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:10:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:10:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:10:56,146 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2022-07-22 21:10:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:10:56,581 INFO L93 Difference]: Finished difference Result 219 states and 270 transitions. [2022-07-22 21:10:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:10:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 61 [2022-07-22 21:10:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:10:56,592 INFO L225 Difference]: With dead ends: 219 [2022-07-22 21:10:56,593 INFO L226 Difference]: Without dead ends: 217 [2022-07-22 21:10:56,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:10:56,593 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 34 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 21:10:56,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 500 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 21:10:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-22 21:10:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 202. [2022-07-22 21:10:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 169 states have (on average 1.2011834319526626) internal successors, (203), 177 states have internal predecessors, (203), 24 states have call successors, (24), 7 states have call predecessors, (24), 8 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 21:10:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 249 transitions. [2022-07-22 21:10:56,613 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 249 transitions. Word has length 61 [2022-07-22 21:10:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:10:56,614 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 249 transitions. [2022-07-22 21:10:56,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2022-07-22 21:10:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 249 transitions. [2022-07-22 21:10:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 21:10:56,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:10:56,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:10:56,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-22 21:10:56,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:10:56,823 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:10:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:10:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash -943451417, now seen corresponding path program 1 times [2022-07-22 21:10:56,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:10:56,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133906304] [2022-07-22 21:10:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:10:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:10:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:10:56,826 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:10:56,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-22 21:10:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:10:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:10:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 21:11:01,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:01,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133906304] [2022-07-22 21:11:01,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133906304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:01,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:11:01,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 21:11:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579541744] [2022-07-22 21:11:01,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:01,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:11:01,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:11:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:11:01,782 INFO L87 Difference]: Start difference. First operand 202 states and 249 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:02,668 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2022-07-22 21:11:02,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:11:02,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-07-22 21:11:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:02,670 INFO L225 Difference]: With dead ends: 364 [2022-07-22 21:11:02,670 INFO L226 Difference]: Without dead ends: 344 [2022-07-22 21:11:02,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:11:02,671 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 66 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:02,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1287 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 525 Unchecked, 0.4s Time] [2022-07-22 21:11:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-22 21:11:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2022-07-22 21:11:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 176 states have (on average 1.2045454545454546) internal successors, (212), 184 states have internal predecessors, (212), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 21:11:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 260 transitions. [2022-07-22 21:11:02,689 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 260 transitions. Word has length 66 [2022-07-22 21:11:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:02,689 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 260 transitions. [2022-07-22 21:11:02,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 260 transitions. [2022-07-22 21:11:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 21:11:02,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:02,691 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:02,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:02,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:02,899 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash 979776617, now seen corresponding path program 1 times [2022-07-22 21:11:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:02,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763672879] [2022-07-22 21:11:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:02,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:02,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:02,901 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:02,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-22 21:11:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:11:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 21:11:07,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:07,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:07,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763672879] [2022-07-22 21:11:07,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763672879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:07,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:11:07,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 21:11:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52354217] [2022-07-22 21:11:07,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:07,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:11:07,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:07,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:11:07,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2022-07-22 21:11:07,169 INFO L87 Difference]: Start difference. First operand 210 states and 260 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:07,589 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-07-22 21:11:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:11:07,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-07-22 21:11:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:07,591 INFO L225 Difference]: With dead ends: 263 [2022-07-22 21:11:07,591 INFO L226 Difference]: Without dead ends: 243 [2022-07-22 21:11:07,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2022-07-22 21:11:07,591 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 7 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:07,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 581 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-07-22 21:11:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-22 21:11:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2022-07-22 21:11:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 175 states have (on average 1.2) internal successors, (210), 183 states have internal predecessors, (210), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 21:11:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2022-07-22 21:11:07,617 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 66 [2022-07-22 21:11:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:07,617 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2022-07-22 21:11:07,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2022-07-22 21:11:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 21:11:07,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:07,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:07,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:07,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:07,827 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:07,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1210749100, now seen corresponding path program 1 times [2022-07-22 21:11:07,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:07,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938448151] [2022-07-22 21:11:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:07,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:07,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:07,829 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:07,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-22 21:11:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 21:11:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:11:10,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:11:11,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:11,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938448151] [2022-07-22 21:11:11,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938448151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:11:11,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [898838156] [2022-07-22 21:11:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:11,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-22 21:11:11,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-22 21:11:11,758 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-22 21:11:11,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-22 21:11:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:11:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 21:11:12,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:12,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [898838156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:12,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:11:12,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 13 [2022-07-22 21:11:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417156498] [2022-07-22 21:11:12,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:12,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:11:12,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:11:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:11:12,863 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:14,529 INFO L93 Difference]: Finished difference Result 346 states and 433 transitions. [2022-07-22 21:11:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:11:14,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2022-07-22 21:11:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:14,531 INFO L225 Difference]: With dead ends: 346 [2022-07-22 21:11:14,531 INFO L226 Difference]: Without dead ends: 326 [2022-07-22 21:11:14,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:11:14,532 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 62 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:14,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1028 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 280 Unchecked, 0.3s Time] [2022-07-22 21:11:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-22 21:11:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 211. [2022-07-22 21:11:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 177 states have (on average 1.2090395480225988) internal successors, (214), 185 states have internal predecessors, (214), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 21:11:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 262 transitions. [2022-07-22 21:11:14,556 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 262 transitions. Word has length 67 [2022-07-22 21:11:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:14,556 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 262 transitions. [2022-07-22 21:11:14,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 262 transitions. [2022-07-22 21:11:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 21:11:14,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:14,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:14,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:14,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:14,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-22 21:11:14,965 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1980026946, now seen corresponding path program 1 times [2022-07-22 21:11:14,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:14,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893350397] [2022-07-22 21:11:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:14,967 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:14,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-22 21:11:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:11:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 21:11:17,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:17,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:17,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893350397] [2022-07-22 21:11:17,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893350397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:17,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:11:17,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 21:11:17,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168627597] [2022-07-22 21:11:17,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:17,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:11:17,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:17,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:11:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:11:17,236 INFO L87 Difference]: Start difference. First operand 211 states and 262 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:23,325 INFO L93 Difference]: Finished difference Result 314 states and 391 transitions. [2022-07-22 21:11:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:11:23,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2022-07-22 21:11:23,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:23,327 INFO L225 Difference]: With dead ends: 314 [2022-07-22 21:11:23,327 INFO L226 Difference]: Without dead ends: 306 [2022-07-22 21:11:23,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:11:23,328 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 126 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:23,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 919 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-22 21:11:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-22 21:11:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 212. [2022-07-22 21:11:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 178 states have (on average 1.202247191011236) internal successors, (214), 186 states have internal predecessors, (214), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 21:11:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2022-07-22 21:11:23,353 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 67 [2022-07-22 21:11:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:23,353 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2022-07-22 21:11:23,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2022-07-22 21:11:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 21:11:23,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:23,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:23,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:23,559 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:23,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1720222190, now seen corresponding path program 1 times [2022-07-22 21:11:23,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910191201] [2022-07-22 21:11:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:23,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:23,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:23,561 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:23,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-22 21:11:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:23,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:11:23,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 21:11:25,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:25,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:25,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910191201] [2022-07-22 21:11:25,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910191201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:25,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:11:25,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:11:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793247656] [2022-07-22 21:11:25,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:11:25,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:11:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:11:25,141 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:26,712 INFO L93 Difference]: Finished difference Result 339 states and 421 transitions. [2022-07-22 21:11:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:11:26,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2022-07-22 21:11:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:26,714 INFO L225 Difference]: With dead ends: 339 [2022-07-22 21:11:26,714 INFO L226 Difference]: Without dead ends: 319 [2022-07-22 21:11:26,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:11:26,715 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 77 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:26,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 739 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 128 Unchecked, 0.6s Time] [2022-07-22 21:11:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-22 21:11:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 202. [2022-07-22 21:11:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 170 states have (on average 1.188235294117647) internal successors, (202), 177 states have internal predecessors, (202), 23 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 21:11:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 246 transitions. [2022-07-22 21:11:26,750 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 246 transitions. Word has length 67 [2022-07-22 21:11:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:26,750 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 246 transitions. [2022-07-22 21:11:26,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 21:11:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 246 transitions. [2022-07-22 21:11:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 21:11:26,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:26,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:26,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:26,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:26,959 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:26,960 INFO L85 PathProgramCache]: Analyzing trace with hash -7943642, now seen corresponding path program 1 times [2022-07-22 21:11:26,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:26,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241768570] [2022-07-22 21:11:26,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:26,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:26,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:26,962 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:26,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-22 21:11:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:27,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:11:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 21:11:27,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:27,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:27,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241768570] [2022-07-22 21:11:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241768570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:27,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:11:27,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:11:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700392810] [2022-07-22 21:11:27,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:27,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:11:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:11:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:11:27,249 INFO L87 Difference]: Start difference. First operand 202 states and 246 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 21:11:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:27,593 INFO L93 Difference]: Finished difference Result 237 states and 285 transitions. [2022-07-22 21:11:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:11:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2022-07-22 21:11:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:27,595 INFO L225 Difference]: With dead ends: 237 [2022-07-22 21:11:27,595 INFO L226 Difference]: Without dead ends: 223 [2022-07-22 21:11:27,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:11:27,596 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 30 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:27,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 486 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 21:11:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-22 21:11:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2022-07-22 21:11:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 164 states have (on average 1.1829268292682926) internal successors, (194), 174 states have internal predecessors, (194), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 17 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 21:11:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 240 transitions. [2022-07-22 21:11:27,621 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 240 transitions. Word has length 69 [2022-07-22 21:11:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 21:11:27,621 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 240 transitions. [2022-07-22 21:11:27,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 21:11:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 240 transitions. [2022-07-22 21:11:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 21:11:27,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 21:11:27,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:11:27,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-22 21:11:27,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 21:11:27,830 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:11:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:11:27,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1053686940, now seen corresponding path program 1 times [2022-07-22 21:11:27,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 21:11:27,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906854729] [2022-07-22 21:11:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:11:27,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 21:11:27,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 21:11:27,833 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 21:11:27,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-22 21:11:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:11:27,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 21:11:27,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:11:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 21:11:28,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:11:28,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 21:11:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906854729] [2022-07-22 21:11:28,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906854729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:11:28,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:11:28,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:11:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786279668] [2022-07-22 21:11:28,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:11:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:11:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 21:11:28,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:11:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:11:28,105 INFO L87 Difference]: Start difference. First operand 198 states and 240 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 21:11:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 21:11:28,467 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2022-07-22 21:11:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:11:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2022-07-22 21:11:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 21:11:28,468 INFO L225 Difference]: With dead ends: 227 [2022-07-22 21:11:28,468 INFO L226 Difference]: Without dead ends: 213 [2022-07-22 21:11:28,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:11:28,469 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 30 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 21:11:28,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 486 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 21:11:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states.