./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.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 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:41:54,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:41:54,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:41:54,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:41:54,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:41:54,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:41:54,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:41:54,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:41:54,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:41:54,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:41:54,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:41:54,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:41:54,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:41:54,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:41:54,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:41:54,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:41:54,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:41:54,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:41:54,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:41:54,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:41:54,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:41:54,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:41:54,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:41:54,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:41:54,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:41:54,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:41:54,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:41:54,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:41:54,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:41:54,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:41:54,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:41:54,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:41:54,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:41:54,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:41:54,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:41:54,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:41:54,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:41:54,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:41:54,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:41:54,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:41:54,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:41:54,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:41:54,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:41:54,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:41:54,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:41:54,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:41:54,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:41:54,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:41:54,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:41:54,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:41:54,955 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:41:54,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:41:54,956 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:41:54,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:41:54,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:41:54,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:41:54,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:41:54,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:41:54,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:41:54,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:41:54,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:41:54,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:41:54,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:41:54,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:41:54,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:41:54,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:41:54,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:41:54,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:41:54,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:41:54,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:41:54,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:41:54,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:41:54,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:41:54,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:41:54,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:41:54,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:41:54,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 [2021-12-17 21:41:55,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:41:55,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:41:55,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:41:55,148 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:41:55,149 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:41:55,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-12-17 21:41:55,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4579af0/ceaa87c9426d4f7bb69b069c24284d1a/FLAGf51f43faf [2021-12-17 21:41:55,528 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:41:55,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-12-17 21:41:55,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4579af0/ceaa87c9426d4f7bb69b069c24284d1a/FLAGf51f43faf [2021-12-17 21:41:55,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4579af0/ceaa87c9426d4f7bb69b069c24284d1a [2021-12-17 21:41:55,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:41:55,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:41:55,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:41:55,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:41:55,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:41:55,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c4e75eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55, skipping insertion in model container [2021-12-17 21:41:55,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:41:55,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:41:55,712 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_1-3a.c.cil.c[1995,2008] [2021-12-17 21:41:55,715 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_1-3a.c.cil.c[2364,2377] [2021-12-17 21:41:55,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:41:55,747 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:41:55,757 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_1-3a.c.cil.c[1995,2008] [2021-12-17 21:41:55,758 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_1-3a.c.cil.c[2364,2377] [2021-12-17 21:41:55,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:41:55,796 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:41:55,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55 WrapperNode [2021-12-17 21:41:55,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:41:55,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:41:55,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:41:55,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:41:55,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,832 INFO L137 Inliner]: procedures = 27, calls = 21, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2021-12-17 21:41:55,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:41:55,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:41:55,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:41:55,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:41:55,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:41:55,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:41:55,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:41:55,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:41:55,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (1/1) ... [2021-12-17 21:41:55,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:41:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:41:55,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:41:55,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:41:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:41:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-17 21:41:55,909 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-17 21:41:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:41:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:41:55,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:41:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 21:41:55,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 21:41:55,967 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:41:55,968 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:41:56,246 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:41:56,251 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:41:56,251 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 21:41:56,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:41:56 BoogieIcfgContainer [2021-12-17 21:41:56,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:41:56,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:41:56,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:41:56,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:41:56,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:41:55" (1/3) ... [2021-12-17 21:41:56,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695b046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:41:56, skipping insertion in model container [2021-12-17 21:41:56,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:55" (2/3) ... [2021-12-17 21:41:56,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695b046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:41:56, skipping insertion in model container [2021-12-17 21:41:56,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:41:56" (3/3) ... [2021-12-17 21:41:56,271 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-3a.c.cil.c [2021-12-17 21:41:56,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:41:56,274 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:41:56,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:41:56,314 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:41:56,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:41:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 21:41:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:41:56,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:56,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:41:56,337 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-17 21:41:56,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:41:56,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763103898] [2021-12-17 21:41:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:56,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:41:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:41:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:41:56,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:41:56,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763103898] [2021-12-17 21:41:56,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763103898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:41:56,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:41:56,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:41:56,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132418617] [2021-12-17 21:41:56,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:41:56,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 21:41:56,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:41:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 21:41:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:41:56,483 INFO L87 Difference]: Start difference. First operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:41:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:41:56,515 INFO L93 Difference]: Finished difference Result 157 states and 249 transitions. [2021-12-17 21:41:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 21:41:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 21:41:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:41:56,526 INFO L225 Difference]: With dead ends: 157 [2021-12-17 21:41:56,526 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 21:41:56,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:41:56,534 INFO L933 BasicCegarLoop]: 117 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, 117 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:41:56,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:41:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 21:41:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-17 21:41:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 64 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 21:41:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2021-12-17 21:41:56,580 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 7 [2021-12-17 21:41:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:41:56,581 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2021-12-17 21:41:56,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:41:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2021-12-17 21:41:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:41:56,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:41:56,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:41:56,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:41:56,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:41:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:41:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-17 21:41:56,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:41:56,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058363085] [2021-12-17 21:41:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:41:56,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:41:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 21:41:56,612 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 21:41:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 21:41:56,647 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 21:41:56,647 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 21:41:56,648 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-17 21:41:56,650 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 21:41:56,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:41:56,654 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-17 21:41:56,656 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 21:41:56,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:41:56 BoogieIcfgContainer [2021-12-17 21:41:56,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 21:41:56,677 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 21:41:56,677 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 21:41:56,678 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 21:41:56,678 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:41:56" (3/4) ... [2021-12-17 21:41:56,680 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 21:41:56,680 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 21:41:56,682 INFO L158 Benchmark]: Toolchain (without parser) took 1135.92ms. Allocated memory is still 109.1MB. Free memory was 77.0MB in the beginning and 37.5MB in the end (delta: 39.5MB). Peak memory consumption was 37.3MB. Max. memory is 16.1GB. [2021-12-17 21:41:56,682 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 77.6MB. Free memory is still 35.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:41:56,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.46ms. Allocated memory is still 109.1MB. Free memory was 76.8MB in the beginning and 81.6MB in the end (delta: -4.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 21:41:56,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.54ms. Allocated memory is still 109.1MB. Free memory was 81.6MB in the beginning and 79.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 21:41:56,686 INFO L158 Benchmark]: Boogie Preprocessor took 17.65ms. Allocated memory is still 109.1MB. Free memory was 79.4MB in the beginning and 78.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 21:41:56,686 INFO L158 Benchmark]: RCFGBuilder took 401.30ms. Allocated memory is still 109.1MB. Free memory was 78.0MB in the beginning and 62.5MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-17 21:41:56,687 INFO L158 Benchmark]: TraceAbstraction took 420.68ms. Allocated memory is still 109.1MB. Free memory was 61.7MB in the beginning and 37.5MB in the end (delta: 24.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-17 21:41:56,687 INFO L158 Benchmark]: Witness Printer took 3.14ms. Allocated memory is still 109.1MB. Free memory is still 37.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:41:56,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 77.6MB. Free memory is still 35.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.46ms. Allocated memory is still 109.1MB. Free memory was 76.8MB in the beginning and 81.6MB in the end (delta: -4.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.54ms. Allocated memory is still 109.1MB. Free memory was 81.6MB in the beginning and 79.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.65ms. Allocated memory is still 109.1MB. Free memory was 79.4MB in the beginning and 78.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 401.30ms. Allocated memory is still 109.1MB. Free memory was 78.0MB in the beginning and 62.5MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 420.68ms. Allocated memory is still 109.1MB. Free memory was 61.7MB in the beginning and 37.5MB in the end (delta: 24.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 3.14ms. Allocated memory is still 109.1MB. Free memory is still 37.5MB. 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: [L402] COND TRUE __VERIFIER_nondet_int() [L403] 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: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 81 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, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 117 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, 117 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=81occurred 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 [2021-12-17 21:41:56,721 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_1-3a.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 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:41:58,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:41:58,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:41:58,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:41:58,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:41:58,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:41:58,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:41:58,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:41:58,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:41:58,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:41:58,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:41:58,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:41:58,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:41:58,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:41:58,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:41:58,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:41:58,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:41:58,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:41:58,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:41:58,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:41:58,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:41:58,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:41:58,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:41:58,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:41:58,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:41:58,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:41:58,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:41:58,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:41:58,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:41:58,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:41:58,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:41:58,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:41:58,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:41:58,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:41:58,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:41:58,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:41:58,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:41:58,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:41:58,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:41:58,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:41:58,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:41:58,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 21:41:58,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:41:58,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:41:58,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:41:58,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:41:58,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:41:58,505 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:41:58,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:41:58,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:41:58,507 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:41:58,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:41:58,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:41:58,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:41:58,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:41:58,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:41:58,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:41:58,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:41:58,508 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 21:41:58,508 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 21:41:58,509 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 21:41:58,509 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:41:58,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:41:58,509 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:41:58,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:41:58,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:41:58,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:41:58,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:41:58,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:41:58,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:41:58,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:41:58,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:41:58,511 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 21:41:58,511 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 21:41:58,511 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:41:58,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:41:58,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:41:58,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:41:58,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 21:41:58,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 [2021-12-17 21:41:58,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:41:58,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:41:58,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:41:58,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:41:58,819 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:41:58,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-12-17 21:41:58,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c26363d/4e2011cc9c464de4b6243d62cf3c502d/FLAG275f8ac56 [2021-12-17 21:41:59,261 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:41:59,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-12-17 21:41:59,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c26363d/4e2011cc9c464de4b6243d62cf3c502d/FLAG275f8ac56 [2021-12-17 21:41:59,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c26363d/4e2011cc9c464de4b6243d62cf3c502d [2021-12-17 21:41:59,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:41:59,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:41:59,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:41:59,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:41:59,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:41:59,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d881dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59, skipping insertion in model container [2021-12-17 21:41:59,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:41:59,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:41:59,477 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_1-3a.c.cil.c[1995,2008] [2021-12-17 21:41:59,482 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_1-3a.c.cil.c[2364,2377] [2021-12-17 21:41:59,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:41:59,560 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:41:59,582 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_1-3a.c.cil.c[1995,2008] [2021-12-17 21:41:59,584 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_1-3a.c.cil.c[2364,2377] [2021-12-17 21:41:59,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:41:59,610 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:41:59,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59 WrapperNode [2021-12-17 21:41:59,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:41:59,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:41:59,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:41:59,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:41:59,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,666 INFO L137 Inliner]: procedures = 28, calls = 21, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 164 [2021-12-17 21:41:59,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:41:59,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:41:59,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:41:59,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:41:59,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:41:59,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:41:59,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:41:59,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:41:59,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (1/1) ... [2021-12-17 21:41:59,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:41:59,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:41:59,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:41:59,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:41:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:41:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 21:41:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-17 21:41:59,782 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-17 21:41:59,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:41:59,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:41:59,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 21:41:59,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 21:41:59,859 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:41:59,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:42:02,353 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:42:02,358 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:42:02,358 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 21:42:02,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:42:02 BoogieIcfgContainer [2021-12-17 21:42:02,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:42:02,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:42:02,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:42:02,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:42:02,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:41:59" (1/3) ... [2021-12-17 21:42:02,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682eef3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:42:02, skipping insertion in model container [2021-12-17 21:42:02,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:41:59" (2/3) ... [2021-12-17 21:42:02,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682eef3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:42:02, skipping insertion in model container [2021-12-17 21:42:02,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:42:02" (3/3) ... [2021-12-17 21:42:02,364 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-3a.c.cil.c [2021-12-17 21:42:02,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:42:02,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:42:02,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:42:02,399 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:42:02,399 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:42:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 21:42:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:42:02,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:42:02,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:42:02,412 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:42:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:42:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-17 21:42:02,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:42:02,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995265975] [2021-12-17 21:42:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:42:02,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:42:02,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:42:02,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:42:02,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 21:42:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:42:02,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 21:42:02,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:42:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:42:02,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:42:02,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:42:02,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995265975] [2021-12-17 21:42:02,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995265975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:42:02,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:42:02,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:42:02,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765078030] [2021-12-17 21:42:02,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:42:02,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 21:42:02,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:42:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 21:42:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:42:02,918 INFO L87 Difference]: Start difference. First operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:42:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:42:02,943 INFO L93 Difference]: Finished difference Result 157 states and 249 transitions. [2021-12-17 21:42:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 21:42:02,945 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 21:42:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:42:02,950 INFO L225 Difference]: With dead ends: 157 [2021-12-17 21:42:02,950 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 21:42:02,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:42:02,955 INFO L933 BasicCegarLoop]: 117 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, 117 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:42:02,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:42:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 21:42:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-17 21:42:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 64 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 21:42:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2021-12-17 21:42:02,989 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 7 [2021-12-17 21:42:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:42:02,989 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2021-12-17 21:42:02,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:42:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2021-12-17 21:42:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:42:02,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:42:02,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:42:03,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:42:03,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:42:03,196 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:42:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:42:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-17 21:42:03,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:42:03,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681064456] [2021-12-17 21:42:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:42:03,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:42:03,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:42:03,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:42:03,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 21:44:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:44:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:33,779 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)))))) is different from false [2021-12-17 21:45:23,851 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) is different from false [2021-12-17 21:45:25,920 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) is different from true [2021-12-17 21:45:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:45:25,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:25,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:25,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681064456] [2021-12-17 21:45:25,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681064456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:25,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:25,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:45:25,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552492842] [2021-12-17 21:45:25,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:25,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:45:25,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:45:25,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-12-17 21:45:25,924 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:45:28,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 21:45:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:28,752 INFO L93 Difference]: Finished difference Result 74 states and 108 transitions. [2021-12-17 21:45:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:45:28,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 21:45:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:28,754 INFO L225 Difference]: With dead ends: 74 [2021-12-17 21:45:28,754 INFO L226 Difference]: Without dead ends: 69 [2021-12-17 21:45:28,755 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:45:28,756 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 104 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:28,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 273 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 1 Unknown, 211 Unchecked, 2.6s Time] [2021-12-17 21:45:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-17 21:45:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-17 21:45:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 59 states have internal predecessors, (86), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 21:45:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 103 transitions. [2021-12-17 21:45:28,762 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 103 transitions. Word has length 7 [2021-12-17 21:45:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:28,762 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 103 transitions. [2021-12-17 21:45:28,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:45:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 103 transitions. [2021-12-17 21:45:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 21:45:28,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:28,764 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:28,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-17 21:45:28,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:28,964 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:28,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1413922597, now seen corresponding path program 1 times [2021-12-17 21:45:28,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:28,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626887736] [2021-12-17 21:45:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:28,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:28,967 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:28,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 21:45:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:29,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:45:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:29,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:45:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:29,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626887736] [2021-12-17 21:45:29,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626887736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:45:29,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:45:29,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-17 21:45:29,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785398606] [2021-12-17 21:45:29,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:45:29,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:45:29,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:29,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:45:29,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:45:29,759 INFO L87 Difference]: Start difference. First operand 69 states and 103 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) [2021-12-17 21:45:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:30,134 INFO L93 Difference]: Finished difference Result 162 states and 253 transitions. [2021-12-17 21:45:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:45:30,141 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 [2021-12-17 21:45:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:30,144 INFO L225 Difference]: With dead ends: 162 [2021-12-17 21:45:30,144 INFO L226 Difference]: Without dead ends: 118 [2021-12-17 21:45:30,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:45:30,145 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 57 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:30,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 712 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:45:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-17 21:45:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2021-12-17 21:45:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 68 states have internal predecessors, (96), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-17 21:45:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 122 transitions. [2021-12-17 21:45:30,158 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 122 transitions. Word has length 33 [2021-12-17 21:45:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:30,158 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 122 transitions. [2021-12-17 21:45:30,158 INFO L471 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) [2021-12-17 21:45:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 122 transitions. [2021-12-17 21:45:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 21:45:30,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:30,163 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:30,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:30,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:30,368 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:30,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1578065669, now seen corresponding path program 1 times [2021-12-17 21:45:30,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:30,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932687544] [2021-12-17 21:45:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:30,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:30,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:30,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:30,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 21:45:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:30,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:45:30,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:30,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:45:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:31,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932687544] [2021-12-17 21:45:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932687544] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:45:31,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:45:31,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-17 21:45:31,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520149488] [2021-12-17 21:45:31,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:45:31,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:45:31,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:45:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:45:31,196 INFO L87 Difference]: Start difference. First operand 81 states and 122 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) [2021-12-17 21:45:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:31,661 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2021-12-17 21:45:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:45:31,661 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 [2021-12-17 21:45:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:31,662 INFO L225 Difference]: With dead ends: 179 [2021-12-17 21:45:31,663 INFO L226 Difference]: Without dead ends: 132 [2021-12-17 21:45:31,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:45:31,664 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 55 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:31,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 469 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:45:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-17 21:45:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2021-12-17 21:45:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 102 states have (on average 1.4313725490196079) internal successors, (146), 103 states have internal predecessors, (146), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 20 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-17 21:45:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 188 transitions. [2021-12-17 21:45:31,678 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 188 transitions. Word has length 37 [2021-12-17 21:45:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:31,679 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 188 transitions. [2021-12-17 21:45:31,679 INFO L471 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) [2021-12-17 21:45:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 188 transitions. [2021-12-17 21:45:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 21:45:31,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:31,681 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:31,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:31,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:31,888 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1319900231, now seen corresponding path program 1 times [2021-12-17 21:45:31,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:31,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513534168] [2021-12-17 21:45:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:31,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:31,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:31,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 21:45:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:31,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:45:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:32,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:32,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:32,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513534168] [2021-12-17 21:45:32,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513534168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:32,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:32,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:45:32,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159115206] [2021-12-17 21:45:32,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:32,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:45:32,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:32,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:45:32,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:45:32,280 INFO L87 Difference]: Start difference. First operand 124 states and 188 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) [2021-12-17 21:45:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:32,721 INFO L93 Difference]: Finished difference Result 280 states and 429 transitions. [2021-12-17 21:45:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:45:32,722 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 [2021-12-17 21:45:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:32,723 INFO L225 Difference]: With dead ends: 280 [2021-12-17 21:45:32,724 INFO L226 Difference]: Without dead ends: 210 [2021-12-17 21:45:32,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:45:32,725 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 52 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:32,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 465 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:45:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-17 21:45:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2021-12-17 21:45:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 174 states have (on average 1.4252873563218391) internal successors, (248), 173 states have internal predecessors, (248), 28 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (34), 34 states have call predecessors, (34), 27 states have call successors, (34) [2021-12-17 21:45:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 310 transitions. [2021-12-17 21:45:32,739 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 310 transitions. Word has length 37 [2021-12-17 21:45:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:32,739 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 310 transitions. [2021-12-17 21:45:32,739 INFO L471 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) [2021-12-17 21:45:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 310 transitions. [2021-12-17 21:45:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 21:45:32,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:32,741 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:32,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-17 21:45:32,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:32,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash -639841861, now seen corresponding path program 1 times [2021-12-17 21:45:32,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:32,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725964578] [2021-12-17 21:45:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:32,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:32,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:32,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:32,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 21:45:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:45:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:33,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:33,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725964578] [2021-12-17 21:45:33,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725964578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:33,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:33,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:45:33,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195690815] [2021-12-17 21:45:33,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:33,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:45:33,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:45:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:45:33,370 INFO L87 Difference]: Start difference. First operand 206 states and 310 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) [2021-12-17 21:45:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:33,972 INFO L93 Difference]: Finished difference Result 294 states and 444 transitions. [2021-12-17 21:45:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:45:33,973 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 [2021-12-17 21:45:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:33,975 INFO L225 Difference]: With dead ends: 294 [2021-12-17 21:45:33,975 INFO L226 Difference]: Without dead ends: 230 [2021-12-17 21:45:33,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:45:33,976 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:33,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 548 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:45:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-17 21:45:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-12-17 21:45:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 162 states have (on average 1.3950617283950617) internal successors, (226), 161 states have internal predecessors, (226), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-17 21:45:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 276 transitions. [2021-12-17 21:45:33,991 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 276 transitions. Word has length 37 [2021-12-17 21:45:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:33,991 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 276 transitions. [2021-12-17 21:45:33,992 INFO L471 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) [2021-12-17 21:45:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 276 transitions. [2021-12-17 21:45:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 21:45:33,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:33,993 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:34,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:34,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:34,201 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 321822244, now seen corresponding path program 1 times [2021-12-17 21:45:34,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708012253] [2021-12-17 21:45:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:34,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:34,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:34,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 21:45:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:34,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:45:34,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:34,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:45:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:35,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708012253] [2021-12-17 21:45:35,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708012253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:45:35,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:45:35,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-17 21:45:35,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897752061] [2021-12-17 21:45:35,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:45:35,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:45:35,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:45:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:45:35,125 INFO L87 Difference]: Start difference. First operand 188 states and 276 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) [2021-12-17 21:45:35,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:35,985 INFO L93 Difference]: Finished difference Result 276 states and 412 transitions. [2021-12-17 21:45:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:45:35,985 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 [2021-12-17 21:45:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:35,987 INFO L225 Difference]: With dead ends: 276 [2021-12-17 21:45:35,987 INFO L226 Difference]: Without dead ends: 238 [2021-12-17 21:45:35,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:45:35,989 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 195 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:35,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 656 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:45:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-17 21:45:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 179. [2021-12-17 21:45:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 155 states have internal predecessors, (216), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2021-12-17 21:45:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 260 transitions. [2021-12-17 21:45:35,999 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 260 transitions. Word has length 41 [2021-12-17 21:45:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:35,999 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 260 transitions. [2021-12-17 21:45:35,999 INFO L471 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) [2021-12-17 21:45:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 260 transitions. [2021-12-17 21:45:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 21:45:36,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:36,001 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:36,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:36,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:36,209 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 64679693, now seen corresponding path program 1 times [2021-12-17 21:45:36,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:36,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506068236] [2021-12-17 21:45:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:36,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:36,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:36,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:36,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 21:45:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:45:36,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 21:45:36,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:36,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:36,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506068236] [2021-12-17 21:45:36,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506068236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:36,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:36,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:45:36,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85867593] [2021-12-17 21:45:36,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:36,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:45:36,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:45:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:45:36,493 INFO L87 Difference]: Start difference. First operand 179 states and 260 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) [2021-12-17 21:45:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:36,661 INFO L93 Difference]: Finished difference Result 332 states and 490 transitions. [2021-12-17 21:45:36,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:45:36,661 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 [2021-12-17 21:45:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:36,663 INFO L225 Difference]: With dead ends: 332 [2021-12-17 21:45:36,663 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 21:45:36,663 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:45:36,664 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 66 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:36,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 336 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:45:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 21:45:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-12-17 21:45:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 208 states have (on average 1.3461538461538463) internal successors, (280), 207 states have internal predecessors, (280), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-17 21:45:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 330 transitions. [2021-12-17 21:45:36,688 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 330 transitions. Word has length 44 [2021-12-17 21:45:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:36,688 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 330 transitions. [2021-12-17 21:45:36,689 INFO L471 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) [2021-12-17 21:45:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 330 transitions. [2021-12-17 21:45:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 21:45:36,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:36,691 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:36,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-17 21:45:36,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:36,902 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1143994910, now seen corresponding path program 1 times [2021-12-17 21:45:36,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:36,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477739184] [2021-12-17 21:45:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:36,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:36,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:36,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:36,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 21:45:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:36,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:45:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:45:37,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:37,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:37,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477739184] [2021-12-17 21:45:37,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477739184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:37,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:37,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:45:37,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838112354] [2021-12-17 21:45:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:37,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:45:37,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:45:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:45:37,294 INFO L87 Difference]: Start difference. First operand 234 states and 330 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) [2021-12-17 21:45:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:37,560 INFO L93 Difference]: Finished difference Result 409 states and 574 transitions. [2021-12-17 21:45:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:45:37,561 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 [2021-12-17 21:45:37,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:37,562 INFO L225 Difference]: With dead ends: 409 [2021-12-17 21:45:37,562 INFO L226 Difference]: Without dead ends: 179 [2021-12-17 21:45:37,563 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:45:37,564 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 25 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:37,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 253 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:45:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-17 21:45:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2021-12-17 21:45:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 147 states have (on average 1.3061224489795917) internal successors, (192), 149 states have internal predecessors, (192), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-17 21:45:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2021-12-17 21:45:37,574 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 44 [2021-12-17 21:45:37,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:37,574 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2021-12-17 21:45:37,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (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) [2021-12-17 21:45:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2021-12-17 21:45:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:45:37,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:37,576 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:37,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:37,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:37,783 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash -610339590, now seen corresponding path program 1 times [2021-12-17 21:45:37,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:37,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727388821] [2021-12-17 21:45:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:37,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:37,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:37,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 21:45:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:37,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 21:45:37,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:45:38,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:45:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 21:45:39,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:39,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727388821] [2021-12-17 21:45:39,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727388821] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 21:45:39,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:45:39,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-12-17 21:45:39,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021182565] [2021-12-17 21:45:39,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:39,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:45:39,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:39,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:45:39,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:45:39,352 INFO L87 Difference]: Start difference. First operand 167 states and 227 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) [2021-12-17 21:45:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:41,140 INFO L93 Difference]: Finished difference Result 317 states and 460 transitions. [2021-12-17 21:45:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:45:41,141 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 [2021-12-17 21:45:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:41,142 INFO L225 Difference]: With dead ends: 317 [2021-12-17 21:45:41,143 INFO L226 Difference]: Without dead ends: 281 [2021-12-17 21:45:41,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:45:41,143 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 188 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:41,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 501 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:45:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-17 21:45:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 205. [2021-12-17 21:45:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 179 states have (on average 1.3016759776536313) internal successors, (233), 182 states have internal predecessors, (233), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-17 21:45:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 280 transitions. [2021-12-17 21:45:41,154 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 280 transitions. Word has length 45 [2021-12-17 21:45:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:41,154 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 280 transitions. [2021-12-17 21:45:41,154 INFO L471 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) [2021-12-17 21:45:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 280 transitions. [2021-12-17 21:45:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:45:41,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:41,155 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:41,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:41,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:41,359 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1164667772, now seen corresponding path program 1 times [2021-12-17 21:45:41,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:41,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339593866] [2021-12-17 21:45:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:41,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:41,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:41,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:41,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 21:45:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:41,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 21:45:41,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 21:45:41,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:41,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:41,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339593866] [2021-12-17 21:45:41,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339593866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:41,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:41,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:45:41,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471577396] [2021-12-17 21:45:41,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:41,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:45:41,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:45:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:45:41,562 INFO L87 Difference]: Start difference. First operand 205 states and 280 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) [2021-12-17 21:45:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:41,726 INFO L93 Difference]: Finished difference Result 212 states and 286 transitions. [2021-12-17 21:45:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:45:41,726 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 [2021-12-17 21:45:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:41,728 INFO L225 Difference]: With dead ends: 212 [2021-12-17 21:45:41,728 INFO L226 Difference]: Without dead ends: 205 [2021-12-17 21:45:41,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:45:41,728 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 5 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:41,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 386 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:45:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-17 21:45:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-17 21:45:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 179 states have (on average 1.2849162011173185) internal successors, (230), 182 states have internal predecessors, (230), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-17 21:45:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2021-12-17 21:45:41,736 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 45 [2021-12-17 21:45:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:41,736 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2021-12-17 21:45:41,736 INFO L471 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) [2021-12-17 21:45:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2021-12-17 21:45:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:45:41,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:41,736 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:41,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:41,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:41,937 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash -617643621, now seen corresponding path program 1 times [2021-12-17 21:45:41,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:41,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855435666] [2021-12-17 21:45:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:41,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:41,939 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:41,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 21:45:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:41,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:45:41,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 21:45:42,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:42,440 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855435666] [2021-12-17 21:45:42,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855435666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:42,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:42,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:45:42,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596366809] [2021-12-17 21:45:42,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:42,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:45:42,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:42,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:45:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:45:42,442 INFO L87 Difference]: Start difference. First operand 205 states and 277 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) [2021-12-17 21:45:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:42,753 INFO L93 Difference]: Finished difference Result 248 states and 338 transitions. [2021-12-17 21:45:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:45:42,753 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 [2021-12-17 21:45:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:42,754 INFO L225 Difference]: With dead ends: 248 [2021-12-17 21:45:42,754 INFO L226 Difference]: Without dead ends: 246 [2021-12-17 21:45:42,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:45:42,755 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:42,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 601 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2021-12-17 21:45:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-17 21:45:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 209. [2021-12-17 21:45:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 182 states have (on average 1.2802197802197801) internal successors, (233), 185 states have internal predecessors, (233), 21 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-17 21:45:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 280 transitions. [2021-12-17 21:45:42,764 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 280 transitions. Word has length 45 [2021-12-17 21:45:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:42,764 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 280 transitions. [2021-12-17 21:45:42,764 INFO L471 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) [2021-12-17 21:45:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 280 transitions. [2021-12-17 21:45:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:45:42,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:42,765 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:42,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:42,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:42,975 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash -560385319, now seen corresponding path program 1 times [2021-12-17 21:45:42,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:42,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334513277] [2021-12-17 21:45:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:42,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:42,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:42,977 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:42,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 21:45:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 21:45:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 21:45:43,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:43,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334513277] [2021-12-17 21:45:43,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334513277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:43,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:43,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:45:43,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247831728] [2021-12-17 21:45:43,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:43,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:45:43,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:45:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:45:43,469 INFO L87 Difference]: Start difference. First operand 209 states and 280 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) [2021-12-17 21:45:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:43,752 INFO L93 Difference]: Finished difference Result 262 states and 354 transitions. [2021-12-17 21:45:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:45:43,752 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 [2021-12-17 21:45:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:43,753 INFO L225 Difference]: With dead ends: 262 [2021-12-17 21:45:43,753 INFO L226 Difference]: Without dead ends: 260 [2021-12-17 21:45:43,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:45:43,754 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:43,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 472 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-12-17 21:45:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-17 21:45:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 213. [2021-12-17 21:45:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 185 states have (on average 1.2756756756756757) internal successors, (236), 188 states have internal predecessors, (236), 21 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (26), 23 states have call predecessors, (26), 20 states have call successors, (26) [2021-12-17 21:45:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 283 transitions. [2021-12-17 21:45:43,764 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 283 transitions. Word has length 45 [2021-12-17 21:45:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:43,765 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 283 transitions. [2021-12-17 21:45:43,765 INFO L471 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) [2021-12-17 21:45:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 283 transitions. [2021-12-17 21:45:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 21:45:43,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:43,766 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:43,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:43,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:43,974 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:43,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1322710928, now seen corresponding path program 1 times [2021-12-17 21:45:43,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:43,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802385811] [2021-12-17 21:45:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:43,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:43,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:43,975 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:43,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 21:45:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:45:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 21:45:44,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:44,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:44,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802385811] [2021-12-17 21:45:44,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802385811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:44,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:44,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:45:44,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250785974] [2021-12-17 21:45:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:44,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:45:44,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:45:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:45:44,201 INFO L87 Difference]: Start difference. First operand 213 states and 283 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) [2021-12-17 21:45:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:44,311 INFO L93 Difference]: Finished difference Result 352 states and 482 transitions. [2021-12-17 21:45:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:45:44,312 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 [2021-12-17 21:45:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:44,313 INFO L225 Difference]: With dead ends: 352 [2021-12-17 21:45:44,313 INFO L226 Difference]: Without dead ends: 300 [2021-12-17 21:45:44,314 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:45:44,314 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 75 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:44,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 321 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:45:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-17 21:45:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 232. [2021-12-17 21:45:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 201 states have (on average 1.2835820895522387) internal successors, (258), 203 states have internal predecessors, (258), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (29), 26 states have call predecessors, (29), 23 states have call successors, (29) [2021-12-17 21:45:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 311 transitions. [2021-12-17 21:45:44,327 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 311 transitions. Word has length 46 [2021-12-17 21:45:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:44,328 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 311 transitions. [2021-12-17 21:45:44,329 INFO L471 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) [2021-12-17 21:45:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 311 transitions. [2021-12-17 21:45:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 21:45:44,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:44,330 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:44,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:44,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:44,537 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash -514674649, now seen corresponding path program 1 times [2021-12-17 21:45:44,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:44,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429439617] [2021-12-17 21:45:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:44,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:44,548 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:44,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-17 21:45:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:45:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 21:45:44,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:44,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:44,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429439617] [2021-12-17 21:45:44,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429439617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:44,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:44,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:45:44,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924714957] [2021-12-17 21:45:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:44,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:45:44,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:44,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:45:44,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:45:44,747 INFO L87 Difference]: Start difference. First operand 232 states and 311 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) [2021-12-17 21:45:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:44,845 INFO L93 Difference]: Finished difference Result 247 states and 327 transitions. [2021-12-17 21:45:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:45:44,846 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 [2021-12-17 21:45:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:44,848 INFO L225 Difference]: With dead ends: 247 [2021-12-17 21:45:44,848 INFO L226 Difference]: Without dead ends: 208 [2021-12-17 21:45:44,849 INFO L932 BasicCegarLoop]: 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 [2021-12-17 21:45:44,850 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:44,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 288 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:45:44,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-17 21:45:44,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-12-17 21:45:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 177 states have (on average 1.2994350282485876) internal successors, (230), 180 states have internal predecessors, (230), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (27), 25 states have call predecessors, (27), 23 states have call successors, (27) [2021-12-17 21:45:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 281 transitions. [2021-12-17 21:45:44,859 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 281 transitions. Word has length 49 [2021-12-17 21:45:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:44,860 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 281 transitions. [2021-12-17 21:45:44,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (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) [2021-12-17 21:45:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 281 transitions. [2021-12-17 21:45:44,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 21:45:44,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:44,861 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:44,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:45,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:45,072 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:45,072 INFO L85 PathProgramCache]: Analyzing trace with hash -627639643, now seen corresponding path program 1 times [2021-12-17 21:45:45,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:45,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815464633] [2021-12-17 21:45:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:45,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:45,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:45,074 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:45,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 21:45:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:45:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 21:45:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:45:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 21:45:45,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:45:45,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:45:45,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815464633] [2021-12-17 21:45:45,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815464633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:45:45,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:45:45,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:45:45,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152249826] [2021-12-17 21:45:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:45:45,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:45:45,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:45:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:45:45,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:45:45,349 INFO L87 Difference]: Start difference. First operand 208 states and 281 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) [2021-12-17 21:45:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:45:45,835 INFO L93 Difference]: Finished difference Result 335 states and 452 transitions. [2021-12-17 21:45:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 21:45:45,835 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 [2021-12-17 21:45:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:45:45,836 INFO L225 Difference]: With dead ends: 335 [2021-12-17 21:45:45,837 INFO L226 Difference]: Without dead ends: 293 [2021-12-17 21:45:45,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:45:45,837 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 200 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:45:45,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 421 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:45:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-17 21:45:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 208. [2021-12-17 21:45:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 177 states have (on average 1.2881355932203389) internal successors, (228), 180 states have internal predecessors, (228), 24 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (27), 25 states have call predecessors, (27), 23 states have call successors, (27) [2021-12-17 21:45:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 279 transitions. [2021-12-17 21:45:45,852 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 279 transitions. Word has length 50 [2021-12-17 21:45:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:45:45,852 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 279 transitions. [2021-12-17 21:45:45,852 INFO L471 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) [2021-12-17 21:45:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 279 transitions. [2021-12-17 21:45:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 21:45:45,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:45:45,853 INFO L514 BasicCegarLoop]: 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] [2021-12-17 21:45:45,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:46,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:46,063 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:45:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:45:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1892770879, now seen corresponding path program 1 times [2021-12-17 21:45:46,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:45:46,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931042573] [2021-12-17 21:45:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:45:46,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:45:46,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:45:46,066 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:45:46,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-17 21:45:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 21:45:46,106 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 21:45:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 21:45:46,153 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-17 21:45:46,153 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 21:45:46,154 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-17 21:45:46,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 21:45:46,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-17 21:45:46,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:45:46,366 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:45:46,368 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 21:45:46,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:45:46 BoogieIcfgContainer [2021-12-17 21:45:46,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 21:45:46,403 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 21:45:46,403 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 21:45:46,403 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 21:45:46,404 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:42:02" (3/4) ... [2021-12-17 21:45:46,405 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 21:45:46,447 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 21:45:46,463 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 21:45:46,467 INFO L158 Benchmark]: Toolchain (without parser) took 227161.15ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 41.0MB in the beginning and 34.7MB in the end (delta: 6.2MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-12-17 21:45:46,467 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 60.8MB. Free memory was 43.0MB in the beginning and 43.0MB in the end (delta: 49.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:45:46,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.71ms. Allocated memory is still 60.8MB. Free memory was 40.8MB in the beginning and 39.2MB in the end (delta: 1.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 21:45:46,468 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.46ms. Allocated memory is still 60.8MB. Free memory was 39.2MB in the beginning and 37.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 21:45:46,468 INFO L158 Benchmark]: Boogie Preprocessor took 43.71ms. Allocated memory is still 60.8MB. Free memory was 37.1MB in the beginning and 35.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:45:46,468 INFO L158 Benchmark]: RCFGBuilder took 2647.47ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 35.2MB in the beginning and 49.6MB in the end (delta: -14.4MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2021-12-17 21:45:46,468 INFO L158 Benchmark]: TraceAbstraction took 224041.96ms. Allocated memory is still 75.5MB. Free memory was 49.2MB in the beginning and 38.9MB in the end (delta: 10.2MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-12-17 21:45:46,468 INFO L158 Benchmark]: Witness Printer took 60.10ms. Allocated memory is still 75.5MB. Free memory was 38.9MB in the beginning and 34.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 21:45:46,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 60.8MB. Free memory was 43.0MB in the beginning and 43.0MB in the end (delta: 49.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.71ms. Allocated memory is still 60.8MB. Free memory was 40.8MB in the beginning and 39.2MB in the end (delta: 1.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.46ms. Allocated memory is still 60.8MB. Free memory was 39.2MB in the beginning and 37.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.71ms. Allocated memory is still 60.8MB. Free memory was 37.1MB in the beginning and 35.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 2647.47ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 35.2MB in the beginning and 49.6MB in the end (delta: -14.4MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * TraceAbstraction took 224041.96ms. Allocated memory is still 75.5MB. Free memory was 49.2MB in the beginning and 38.9MB in the end (delta: 10.2MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Witness Printer took 60.10ms. Allocated memory is still 75.5MB. Free memory was 38.9MB in the beginning and 34.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 60]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L402] COND FALSE !(__VERIFIER_nondet_int()) [L405] CALL main2() [L269] unsigned int a ; [L270] unsigned int ma = __VERIFIER_nondet_uint(); [L271] signed char ea = __VERIFIER_nondet_char(); [L272] unsigned int b ; [L273] unsigned int mb = __VERIFIER_nondet_uint(); [L274] signed char eb = __VERIFIER_nondet_char(); [L275] unsigned int r_add ; [L276] unsigned int zero ; [L277] int sa ; [L278] int sb ; [L279] int tmp ; [L280] int tmp___0 ; [L281] int tmp___1 ; [L282] int tmp___2 ; [L283] int tmp___3 ; [L284] int tmp___4 ; [L285] int tmp___5 ; [L286] int tmp___6 ; [L287] int tmp___7 ; [L288] int tmp___8 ; [L289] int tmp___9 ; [L290] int __retres23 ; [L294] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L72] COND TRUE ! m [L73] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L123] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L294] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L294] zero = base2flt(0, 0) [L295] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L100] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L123] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L295] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L295] a = base2flt(ma, ea) [L296] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L100] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L123] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L296] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L296] b = base2flt(mb, eb) [L298] COND FALSE !(a < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L301] COND TRUE a > zero [L302] tmp = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, tmp=1, zero=0] [L306] sa = tmp VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L308] COND FALSE !(b < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L311] COND TRUE b > zero [L312] tmp___0 = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L316] sb = tmp___0 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L319] CALL addflt(a, b) [L127] unsigned int res ; [L128] unsigned int ma ; [L129] unsigned int mb ; [L130] unsigned int delta ; [L131] int ea ; [L132] int eb ; [L133] unsigned int tmp ; [L134] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L137] COND TRUE a < b [L138] tmp = a [L139] a = b [L140] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L144] COND FALSE !(! b) [L151] ma = a & ((1U << 24U) - 1U) [L152] ea = (int )(a >> 24U) - 128 [L153] ma = ma | (1U << 24U) [L154] mb = b & ((1U << 24U) - 1U) [L155] eb = (int )(b >> 24U) - 128 [L156] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L157] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L59] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L157] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L158] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L159] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L59] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L60] reach_error() VAL [\old(cond)=0, cond=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: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 81 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 224.0s, OverallIterations: 17, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1237 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1204 mSDsluCounter, 6819 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 230 IncrementalHoareTripleChecker+Unchecked, 5060 mSDsCounter, 97 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 814 IncrementalHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 97 mSolverCounterUnsat, 1759 mSDtfsCounter, 814 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 775 GetRequests, 683 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=8, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 507 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 135.9s SatisfiabilityAnalysisTime, 74.4s InterpolantComputationTime, 663 NumberOfCodeBlocks, 663 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 748 ConstructedInterpolants, 4 QuantifiedInterpolants, 1394 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1194 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 20 InterpolantComputations, 13 PerfectInterpolantSequences, 255/282 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-17 21:45:46,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE