./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:24:37,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:24:37,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:24:37,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:24:37,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:24:37,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:24:37,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:24:37,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:24:37,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:24:37,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:24:37,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:24:37,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:24:37,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:24:37,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:24:37,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:24:37,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:24:37,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:24:37,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:24:37,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:24:37,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:24:37,353 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:24:37,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:24:37,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:24:37,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:24:37,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:24:37,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:24:37,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:24:37,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:24:37,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:24:37,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:24:37,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:24:37,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:24:37,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:24:37,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:24:37,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:24:37,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:24:37,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:24:37,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:24:37,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:24:37,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:24:37,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:24:37,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:24:37,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:24:37,425 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:24:37,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:24:37,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:24:37,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:24:37,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:24:37,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:24:37,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:24:37,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:24:37,428 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:24:37,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:24:37,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:24:37,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:24:37,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:24:37,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:24:37,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:24:37,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:24:37,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:24:37,430 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:24:37,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:24:37,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:24:37,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:24:37,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:24:37,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:24:37,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:24:37,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:24:37,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:24:37,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:24:37,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:24:37,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:24:37,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:24:37,433 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:24:37,433 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:24:37,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:24:37,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce [2022-07-21 08:24:37,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:24:37,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:24:37,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:24:37,778 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:24:37,778 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:24:37,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-21 08:24:37,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/212175759/f83909a676ba42ae89641988951e48a2/FLAGcd5c0969b [2022-07-21 08:24:38,328 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:24:38,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-21 08:24:38,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/212175759/f83909a676ba42ae89641988951e48a2/FLAGcd5c0969b [2022-07-21 08:24:38,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/212175759/f83909a676ba42ae89641988951e48a2 [2022-07-21 08:24:38,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:24:38,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:24:38,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:24:38,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:24:38,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:24:38,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:24:38" (1/1) ... [2022-07-21 08:24:38,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0595cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:38, skipping insertion in model container [2022-07-21 08:24:38,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:24:38" (1/1) ... [2022-07-21 08:24:38,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:24:38,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:24:39,051 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-21 08:24:39,056 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-21 08:24:39,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:24:39,145 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:24:39,172 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-21 08:24:39,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-21 08:24:39,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:24:39,241 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:24:39,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39 WrapperNode [2022-07-21 08:24:39,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:24:39,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:24:39,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:24:39,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:24:39,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,302 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 235 [2022-07-21 08:24:39,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:24:39,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:24:39,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:24:39,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:24:39,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:24:39,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:24:39,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:24:39,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:24:39,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (1/1) ... [2022-07-21 08:24:39,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:24:39,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:24:39,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:24:39,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:24:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:24:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-21 08:24:39,441 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-21 08:24:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:24:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:24:39,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:24:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 08:24:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 08:24:39,564 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:24:39,569 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:24:39,947 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:24:39,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:24:39,955 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 08:24:39,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:24:39 BoogieIcfgContainer [2022-07-21 08:24:39,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:24:39,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:24:39,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:24:39,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:24:39,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:24:38" (1/3) ... [2022-07-21 08:24:39,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ff3fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:24:39, skipping insertion in model container [2022-07-21 08:24:39,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:39" (2/3) ... [2022-07-21 08:24:39,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ff3fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:24:39, skipping insertion in model container [2022-07-21 08:24:39,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:24:39" (3/3) ... [2022-07-21 08:24:39,968 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-2a.c.cil.c [2022-07-21 08:24:39,981 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:24:39,981 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:24:40,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:24:40,033 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47e010bb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1968df8d [2022-07-21 08:24:40,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:24:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 106 states have internal predecessors, (174), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 08:24:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 08:24:40,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:24:40,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:24:40,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:24:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:24:40,056 INFO L85 PathProgramCache]: Analyzing trace with hash -685161840, now seen corresponding path program 1 times [2022-07-21 08:24:40,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:24:40,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79590500] [2022-07-21 08:24:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:24:40,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:24:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:24:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:24:40,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:24:40,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79590500] [2022-07-21 08:24:40,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79590500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:24:40,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:24:40,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:24:40,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861399301] [2022-07-21 08:24:40,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:24:40,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:24:40,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:24:40,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:24:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:24:40,210 INFO L87 Difference]: Start difference. First operand has 115 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 106 states have internal predecessors, (174), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:24:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:24:40,267 INFO L93 Difference]: Finished difference Result 225 states and 380 transitions. [2022-07-21 08:24:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:24:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 08:24:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:24:40,277 INFO L225 Difference]: With dead ends: 225 [2022-07-21 08:24:40,278 INFO L226 Difference]: Without dead ends: 108 [2022-07-21 08:24:40,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:24:40,286 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:24:40,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:24:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-21 08:24:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-21 08:24:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.5104166666666667) internal successors, (145), 99 states have internal predecessors, (145), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 08:24:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2022-07-21 08:24:40,344 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 7 [2022-07-21 08:24:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:24:40,344 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2022-07-21 08:24:40,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:24:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2022-07-21 08:24:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 08:24:40,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:24:40,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:24:40,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:24:40,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:24:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:24:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash -685102258, now seen corresponding path program 1 times [2022-07-21 08:24:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:24:40,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67185604] [2022-07-21 08:24:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:24:40,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:24:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:24:40,381 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:24:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:24:40,420 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:24:40,421 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:24:40,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-21 08:24:40,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:24:40,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:24:40,429 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:24:40,431 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 08:24:40,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:24:40 BoogieIcfgContainer [2022-07-21 08:24:40,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 08:24:40,457 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 08:24:40,457 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 08:24:40,457 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 08:24:40,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:24:39" (3/4) ... [2022-07-21 08:24:40,461 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 08:24:40,461 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 08:24:40,462 INFO L158 Benchmark]: Toolchain (without parser) took 1605.78ms. Allocated memory was 48.2MB in the beginning and 65.0MB in the end (delta: 16.8MB). Free memory was 32.9MB in the beginning and 26.6MB in the end (delta: 6.3MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2022-07-21 08:24:40,463 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 48.2MB. Free memory was 30.3MB in the beginning and 30.3MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 08:24:40,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 385.79ms. Allocated memory was 48.2MB in the beginning and 65.0MB in the end (delta: 16.8MB). Free memory was 32.7MB in the beginning and 43.6MB in the end (delta: -10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 08:24:40,466 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.39ms. Allocated memory is still 65.0MB. Free memory was 43.4MB in the beginning and 41.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 08:24:40,468 INFO L158 Benchmark]: Boogie Preprocessor took 61.68ms. Allocated memory is still 65.0MB. Free memory was 41.0MB in the beginning and 39.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 08:24:40,468 INFO L158 Benchmark]: RCFGBuilder took 591.54ms. Allocated memory is still 65.0MB. Free memory was 39.1MB in the beginning and 33.6MB in the end (delta: 5.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 08:24:40,469 INFO L158 Benchmark]: TraceAbstraction took 498.15ms. Allocated memory is still 65.0MB. Free memory was 33.0MB in the beginning and 26.9MB in the end (delta: 6.0MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. [2022-07-21 08:24:40,469 INFO L158 Benchmark]: Witness Printer took 3.98ms. Allocated memory is still 65.0MB. Free memory was 26.9MB in the beginning and 26.6MB in the end (delta: 345.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 08:24:40,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 48.2MB. Free memory was 30.3MB in the beginning and 30.3MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 385.79ms. Allocated memory was 48.2MB in the beginning and 65.0MB in the end (delta: 16.8MB). Free memory was 32.7MB in the beginning and 43.6MB in the end (delta: -10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.39ms. Allocated memory is still 65.0MB. Free memory was 43.4MB in the beginning and 41.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.68ms. Allocated memory is still 65.0MB. Free memory was 41.0MB in the beginning and 39.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 591.54ms. Allocated memory is still 65.0MB. Free memory was 39.1MB in the beginning and 33.6MB in the end (delta: 5.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 498.15ms. Allocated memory is still 65.0MB. Free memory was 33.0MB in the beginning and 26.9MB in the end (delta: 6.0MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. * Witness Printer took 3.98ms. Allocated memory is still 65.0MB. Free memory was 26.9MB in the beginning and 26.6MB in the end (delta: 345.5kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 115 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 169 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 169 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-21 08:24:40,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:24:42,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:24:42,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:24:42,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:24:42,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:24:42,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:24:42,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:24:42,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:24:42,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:24:42,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:24:42,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:24:42,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:24:42,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:24:42,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:24:42,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:24:42,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:24:42,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:24:42,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:24:42,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:24:42,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:24:42,432 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:24:42,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:24:42,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:24:42,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:24:42,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:24:42,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:24:42,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:24:42,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:24:42,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:24:42,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:24:42,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:24:42,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:24:42,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:24:42,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:24:42,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:24:42,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:24:42,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:24:42,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:24:42,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:24:42,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:24:42,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:24:42,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:24:42,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 08:24:42,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:24:42,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:24:42,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:24:42,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:24:42,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:24:42,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:24:42,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:24:42,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:24:42,496 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:24:42,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:24:42,497 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:24:42,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:24:42,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:24:42,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:24:42,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:24:42,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:24:42,498 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 08:24:42,498 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 08:24:42,498 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 08:24:42,499 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:24:42,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:24:42,499 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:24:42,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:24:42,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:24:42,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:24:42,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:24:42,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:24:42,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:24:42,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:24:42,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:24:42,501 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 08:24:42,501 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 08:24:42,501 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:24:42,502 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:24:42,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:24:42,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 08:24:42,502 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce [2022-07-21 08:24:42,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:24:42,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:24:42,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:24:42,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:24:42,814 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:24:42,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-21 08:24:42,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16a67b7d/4035c9e0c44f4f9ca3c35be27d9b2f16/FLAG068dcdcd2 [2022-07-21 08:24:43,333 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:24:43,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-21 08:24:43,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16a67b7d/4035c9e0c44f4f9ca3c35be27d9b2f16/FLAG068dcdcd2 [2022-07-21 08:24:43,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16a67b7d/4035c9e0c44f4f9ca3c35be27d9b2f16 [2022-07-21 08:24:43,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:24:43,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:24:43,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:24:43,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:24:43,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:24:43,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:24:43" (1/1) ... [2022-07-21 08:24:43,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5830c478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:43, skipping insertion in model container [2022-07-21 08:24:43,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:24:43" (1/1) ... [2022-07-21 08:24:43,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:24:43,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:24:43,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-21 08:24:43,901 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-21 08:24:43,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:24:43,979 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:24:43,992 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-21 08:24:43,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-21 08:24:44,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:24:44,032 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:24:44,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44 WrapperNode [2022-07-21 08:24:44,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:24:44,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:24:44,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:24:44,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:24:44,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,070 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 165 [2022-07-21 08:24:44,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:24:44,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:24:44,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:24:44,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:24:44,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:24:44,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:24:44,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:24:44,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:24:44,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (1/1) ... [2022-07-21 08:24:44,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:24:44,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:24:44,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:24:44,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:24:44,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:24:44,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 08:24:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-21 08:24:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-21 08:24:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:24:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:24:44,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 08:24:44,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 08:24:44,325 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:24:44,326 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:24:46,913 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:24:46,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:24:46,919 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 08:24:46,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:24:46 BoogieIcfgContainer [2022-07-21 08:24:46,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:24:46,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:24:46,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:24:46,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:24:46,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:24:43" (1/3) ... [2022-07-21 08:24:46,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445678fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:24:46, skipping insertion in model container [2022-07-21 08:24:46,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:24:44" (2/3) ... [2022-07-21 08:24:46,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445678fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:24:46, skipping insertion in model container [2022-07-21 08:24:46,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:24:46" (3/3) ... [2022-07-21 08:24:46,932 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-2a.c.cil.c [2022-07-21 08:24:46,944 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:24:46,945 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:24:46,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:24:46,996 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@513c13bd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@64cfdf3a [2022-07-21 08:24:46,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:24:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 08:24:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 08:24:47,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:24:47,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:24:47,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:24:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:24:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-07-21 08:24:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:24:47,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168593644] [2022-07-21 08:24:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:24:47,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:24:47,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:24:47,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:24:47,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 08:24:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:24:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 08:24:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:24:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:24:47,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:24:47,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:24:47,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168593644] [2022-07-21 08:24:47,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168593644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:24:47,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:24:47,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:24:47,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591634339] [2022-07-21 08:24:47,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:24:47,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:24:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:24:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:24:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:24:47,490 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:24:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:24:47,529 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2022-07-21 08:24:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:24:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 08:24:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:24:47,543 INFO L225 Difference]: With dead ends: 157 [2022-07-21 08:24:47,544 INFO L226 Difference]: Without dead ends: 74 [2022-07-21 08:24:47,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:24:47,553 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:24:47,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:24:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-21 08:24:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-07-21 08:24:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 08:24:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2022-07-21 08:24:47,605 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2022-07-21 08:24:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:24:47,606 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2022-07-21 08:24:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:24:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2022-07-21 08:24:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 08:24:47,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:24:47,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:24:47,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 08:24:47,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:24:47,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:24:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:24:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-07-21 08:24:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:24:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603090938] [2022-07-21 08:24:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:24:47,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:24:47,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:24:47,812 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:24:47,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 08:26:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:26:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:26:59,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:27:14,240 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-07-21 08:28:04,784 WARN L833 $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.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2022-07-21 08:28:06,842 WARN L855 $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.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2022-07-21 08:28:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:28:06,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:06,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603090938] [2022-07-21 08:28:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603090938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:06,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:06,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:28:06,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067136657] [2022-07-21 08:28:06,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:06,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:28:06,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:28:06,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-07-21 08:28:06,846 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:28:09,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 08:28:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:09,582 INFO L93 Difference]: Finished difference Result 74 states and 107 transitions. [2022-07-21 08:28:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:28:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 08:28:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:09,585 INFO L225 Difference]: With dead ends: 74 [2022-07-21 08:28:09,585 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 08:28:09,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-07-21 08:28:09,586 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 103 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:09,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 274 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 209 Unchecked, 2.5s Time] [2022-07-21 08:28:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 08:28:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-21 08:28:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 60 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 08:28:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2022-07-21 08:28:09,595 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 7 [2022-07-21 08:28:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:09,595 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2022-07-21 08:28:09,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:28:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2022-07-21 08:28:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 08:28:09,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:09,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:09,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:09,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:09,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash -567365317, now seen corresponding path program 1 times [2022-07-21 08:28:09,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:09,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777216339] [2022-07-21 08:28:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:09,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:09,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:09,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:09,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 08:28:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:09,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:28:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:10,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:28:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:10,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:10,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777216339] [2022-07-21 08:28:10,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777216339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:28:10,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:28:10,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-21 08:28:10,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888670263] [2022-07-21 08:28:10,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 08:28:10,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:10,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:10,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:28:10,385 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:10,744 INFO L93 Difference]: Finished difference Result 162 states and 250 transitions. [2022-07-21 08:28:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:28:10,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-07-21 08:28:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:10,748 INFO L225 Difference]: With dead ends: 162 [2022-07-21 08:28:10,748 INFO L226 Difference]: Without dead ends: 118 [2022-07-21 08:28:10,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:28:10,750 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 58 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:10,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 733 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 08:28:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-21 08:28:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2022-07-21 08:28:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 69 states have internal predecessors, (97), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-21 08:28:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 121 transitions. [2022-07-21 08:28:10,763 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 121 transitions. Word has length 33 [2022-07-21 08:28:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:10,764 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 121 transitions. [2022-07-21 08:28:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 121 transitions. [2022-07-21 08:28:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 08:28:10,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:10,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:10,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-21 08:28:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:10,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1463451301, now seen corresponding path program 1 times [2022-07-21 08:28:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971606503] [2022-07-21 08:28:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:10,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:10,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:10,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:10,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 08:28:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:28:11,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:11,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:28:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:11,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:11,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971606503] [2022-07-21 08:28:11,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971606503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:28:11,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:28:11,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-21 08:28:11,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711814803] [2022-07-21 08:28:11,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 08:28:11,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:11,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:28:11,506 INFO L87 Difference]: Start difference. First operand 81 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:11,956 INFO L93 Difference]: Finished difference Result 179 states and 273 transitions. [2022-07-21 08:28:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:28:11,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-07-21 08:28:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:11,959 INFO L225 Difference]: With dead ends: 179 [2022-07-21 08:28:11,959 INFO L226 Difference]: Without dead ends: 132 [2022-07-21 08:28:11,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:28:11,960 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 56 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:11,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 456 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 08:28:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-21 08:28:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-07-21 08:28:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 105 states have internal predecessors, (148), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (22), 18 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-21 08:28:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 186 transitions. [2022-07-21 08:28:11,974 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 186 transitions. Word has length 37 [2022-07-21 08:28:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:11,974 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 186 transitions. [2022-07-21 08:28:11,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 186 transitions. [2022-07-21 08:28:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 08:28:11,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:11,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:11,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-21 08:28:12,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:12,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:12,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:12,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1205285863, now seen corresponding path program 1 times [2022-07-21 08:28:12,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:12,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19086410] [2022-07-21 08:28:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:12,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:12,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:12,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:12,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 08:28:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:12,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:28:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:12,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:12,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:12,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19086410] [2022-07-21 08:28:12,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19086410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:12,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:12,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:28:12,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036084500] [2022-07-21 08:28:12,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:12,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:12,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:28:12,468 INFO L87 Difference]: Start difference. First operand 124 states and 186 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:12,921 INFO L93 Difference]: Finished difference Result 280 states and 423 transitions. [2022-07-21 08:28:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:28:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-21 08:28:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:12,924 INFO L225 Difference]: With dead ends: 280 [2022-07-21 08:28:12,924 INFO L226 Difference]: Without dead ends: 210 [2022-07-21 08:28:12,925 INFO L412 NwaCegarLoop]: 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 [2022-07-21 08:28:12,926 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 53 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:12,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 453 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 08:28:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-21 08:28:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2022-07-21 08:28:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 178 states have (on average 1.4157303370786516) internal successors, (252), 177 states have internal predecessors, (252), 24 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2022-07-21 08:28:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 306 transitions. [2022-07-21 08:28:12,943 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 306 transitions. Word has length 37 [2022-07-21 08:28:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:12,943 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 306 transitions. [2022-07-21 08:28:12,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 306 transitions. [2022-07-21 08:28:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 08:28:12,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:12,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:12,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:13,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:13,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash -525227493, now seen corresponding path program 1 times [2022-07-21 08:28:13,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:13,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855429953] [2022-07-21 08:28:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:13,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:13,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:13,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 08:28:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:28:13,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:13,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:13,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:13,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855429953] [2022-07-21 08:28:13,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855429953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:13,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:13,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:28:13,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223096038] [2022-07-21 08:28:13,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:13,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:28:13,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:28:13,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:28:13,538 INFO L87 Difference]: Start difference. First operand 206 states and 306 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:14,137 INFO L93 Difference]: Finished difference Result 294 states and 440 transitions. [2022-07-21 08:28:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:28:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-21 08:28:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:14,141 INFO L225 Difference]: With dead ends: 294 [2022-07-21 08:28:14,141 INFO L226 Difference]: Without dead ends: 230 [2022-07-21 08:28:14,146 INFO L412 NwaCegarLoop]: 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 [2022-07-21 08:28:14,147 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:14,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 539 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 08:28:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-21 08:28:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-07-21 08:28:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 164 states have (on average 1.3902439024390243) internal successors, (228), 163 states have internal predecessors, (228), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-07-21 08:28:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 274 transitions. [2022-07-21 08:28:14,175 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 274 transitions. Word has length 37 [2022-07-21 08:28:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:14,177 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 274 transitions. [2022-07-21 08:28:14,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 274 transitions. [2022-07-21 08:28:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 08:28:14,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:14,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:14,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:14,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:14,388 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1910499068, now seen corresponding path program 1 times [2022-07-21 08:28:14,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:14,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905037698] [2022-07-21 08:28:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:14,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:14,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:14,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:14,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 08:28:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:14,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:28:14,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:14,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:28:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:15,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:15,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905037698] [2022-07-21 08:28:15,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905037698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:28:15,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:28:15,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-21 08:28:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537287936] [2022-07-21 08:28:15,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 08:28:15,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:28:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:28:15,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:28:15,203 INFO L87 Difference]: Start difference. First operand 188 states and 274 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:16,083 INFO L93 Difference]: Finished difference Result 276 states and 410 transitions. [2022-07-21 08:28:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:28:16,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-21 08:28:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:16,085 INFO L225 Difference]: With dead ends: 276 [2022-07-21 08:28:16,085 INFO L226 Difference]: Without dead ends: 238 [2022-07-21 08:28:16,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-21 08:28:16,086 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 197 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:16,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 645 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 08:28:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-21 08:28:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 179. [2022-07-21 08:28:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 157 states have (on average 1.3821656050955413) internal successors, (217), 156 states have internal predecessors, (217), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-21 08:28:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 259 transitions. [2022-07-21 08:28:16,108 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 259 transitions. Word has length 41 [2022-07-21 08:28:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:16,109 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 259 transitions. [2022-07-21 08:28:16,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 259 transitions. [2022-07-21 08:28:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 08:28:16,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:16,111 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:16,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:16,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:16,322 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:16,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:16,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1938435092, now seen corresponding path program 1 times [2022-07-21 08:28:16,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:16,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128326178] [2022-07-21 08:28:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:16,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:16,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:16,324 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:16,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 08:28:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:28:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:16,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:16,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:16,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128326178] [2022-07-21 08:28:16,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128326178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:16,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:16,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:28:16,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294250722] [2022-07-21 08:28:16,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:28:16,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:28:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:28:16,543 INFO L87 Difference]: Start difference. First operand 179 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:16,662 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-07-21 08:28:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:28:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-21 08:28:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:16,665 INFO L225 Difference]: With dead ends: 332 [2022-07-21 08:28:16,665 INFO L226 Difference]: Without dead ends: 266 [2022-07-21 08:28:16,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:16,666 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:16,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 328 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 08:28:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-21 08:28:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2022-07-21 08:28:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 210 states have (on average 1.3428571428571427) internal successors, (282), 209 states have internal predecessors, (282), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-07-21 08:28:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 328 transitions. [2022-07-21 08:28:16,680 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 328 transitions. Word has length 44 [2022-07-21 08:28:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:16,684 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 328 transitions. [2022-07-21 08:28:16,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 328 transitions. [2022-07-21 08:28:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 08:28:16,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:16,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:16,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-21 08:28:16,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:16,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1309251479, now seen corresponding path program 1 times [2022-07-21 08:28:16,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:16,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416745764] [2022-07-21 08:28:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:16,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:16,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:16,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:16,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 08:28:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:28:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:28:17,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:17,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416745764] [2022-07-21 08:28:17,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416745764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:17,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:17,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:28:17,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109775356] [2022-07-21 08:28:17,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:17,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:28:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:28:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:28:17,089 INFO L87 Difference]: Start difference. First operand 234 states and 328 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:17,368 INFO L93 Difference]: Finished difference Result 409 states and 570 transitions. [2022-07-21 08:28:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:28:17,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-07-21 08:28:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:17,371 INFO L225 Difference]: With dead ends: 409 [2022-07-21 08:28:17,371 INFO L226 Difference]: Without dead ends: 179 [2022-07-21 08:28:17,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:17,373 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:17,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 08:28:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-21 08:28:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2022-07-21 08:28:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 151 states have internal predecessors, (194), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-21 08:28:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2022-07-21 08:28:17,389 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 44 [2022-07-21 08:28:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:17,389 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2022-07-21 08:28:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2022-07-21 08:28:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 08:28:17,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:17,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:17,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:17,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:17,606 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:17,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1643290396, now seen corresponding path program 1 times [2022-07-21 08:28:17,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:17,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170025413] [2022-07-21 08:28:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:17,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:17,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:17,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:17,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 08:28:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:17,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 08:28:17,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:18,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:28:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:19,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:19,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170025413] [2022-07-21 08:28:19,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170025413] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 08:28:19,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:28:19,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-21 08:28:19,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498059647] [2022-07-21 08:28:19,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:19,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:19,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:19,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:19,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-21 08:28:19,014 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:20,741 INFO L93 Difference]: Finished difference Result 317 states and 456 transitions. [2022-07-21 08:28:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:28:20,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-21 08:28:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:20,744 INFO L225 Difference]: With dead ends: 317 [2022-07-21 08:28:20,744 INFO L226 Difference]: Without dead ends: 281 [2022-07-21 08:28:20,744 INFO L412 NwaCegarLoop]: 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 [2022-07-21 08:28:20,745 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 188 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:20,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 511 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 08:28:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-07-21 08:28:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 205. [2022-07-21 08:28:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 183 states have (on average 1.2950819672131149) internal successors, (237), 186 states have internal predecessors, (237), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-21 08:28:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 276 transitions. [2022-07-21 08:28:20,756 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 276 transitions. Word has length 45 [2022-07-21 08:28:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:20,757 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 276 transitions. [2022-07-21 08:28:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 276 transitions. [2022-07-21 08:28:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 08:28:20,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:20,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:20,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:20,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:20,968 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash -876669538, now seen corresponding path program 1 times [2022-07-21 08:28:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594266483] [2022-07-21 08:28:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:20,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:20,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:20,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 08:28:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:21,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:28:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:21,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:21,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:21,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594266483] [2022-07-21 08:28:21,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594266483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:21,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:21,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:28:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774729627] [2022-07-21 08:28:21,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:21,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:28:21,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:28:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:21,134 INFO L87 Difference]: Start difference. First operand 205 states and 276 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:21,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:21,289 INFO L93 Difference]: Finished difference Result 212 states and 282 transitions. [2022-07-21 08:28:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:28:21,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-21 08:28:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:21,291 INFO L225 Difference]: With dead ends: 212 [2022-07-21 08:28:21,291 INFO L226 Difference]: Without dead ends: 205 [2022-07-21 08:28:21,291 INFO L412 NwaCegarLoop]: 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 [2022-07-21 08:28:21,292 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:21,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 381 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 08:28:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-21 08:28:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-07-21 08:28:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 183 states have (on average 1.278688524590164) internal successors, (234), 186 states have internal predecessors, (234), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-21 08:28:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 273 transitions. [2022-07-21 08:28:21,302 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 273 transitions. Word has length 45 [2022-07-21 08:28:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:21,302 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 273 transitions. [2022-07-21 08:28:21,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 273 transitions. [2022-07-21 08:28:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 08:28:21,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:21,304 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:21,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:21,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:21,514 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash 457064955, now seen corresponding path program 1 times [2022-07-21 08:28:21,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:21,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165009054] [2022-07-21 08:28:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:21,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:21,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:21,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:21,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 08:28:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:21,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:28:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:21,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:21,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165009054] [2022-07-21 08:28:21,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165009054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:21,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:21,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:28:21,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791700803] [2022-07-21 08:28:21,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:21,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:21,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:21,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:28:21,933 INFO L87 Difference]: Start difference. First operand 205 states and 273 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:22,272 INFO L93 Difference]: Finished difference Result 248 states and 334 transitions. [2022-07-21 08:28:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:28:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-21 08:28:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:22,274 INFO L225 Difference]: With dead ends: 248 [2022-07-21 08:28:22,274 INFO L226 Difference]: Without dead ends: 246 [2022-07-21 08:28:22,274 INFO L412 NwaCegarLoop]: 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 [2022-07-21 08:28:22,276 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 38 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:22,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 596 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-07-21 08:28:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-21 08:28:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 209. [2022-07-21 08:28:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 189 states have internal predecessors, (237), 17 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-21 08:28:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 276 transitions. [2022-07-21 08:28:22,287 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 276 transitions. Word has length 45 [2022-07-21 08:28:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:22,288 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 276 transitions. [2022-07-21 08:28:22,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 276 transitions. [2022-07-21 08:28:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 08:28:22,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:22,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:22,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:22,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:22,505 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash 514323257, now seen corresponding path program 1 times [2022-07-21 08:28:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:22,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069804226] [2022-07-21 08:28:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:22,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:22,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:22,508 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:22,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 08:28:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:22,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 08:28:22,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:22,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:22,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:22,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069804226] [2022-07-21 08:28:22,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069804226] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:22,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:22,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:28:22,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140769208] [2022-07-21 08:28:22,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:22,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:22,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:22,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:22,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:28:22,888 INFO L87 Difference]: Start difference. First operand 209 states and 276 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:23,142 INFO L93 Difference]: Finished difference Result 262 states and 350 transitions. [2022-07-21 08:28:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:28:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-21 08:28:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:23,145 INFO L225 Difference]: With dead ends: 262 [2022-07-21 08:28:23,145 INFO L226 Difference]: Without dead ends: 260 [2022-07-21 08:28:23,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:28:23,146 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:23,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 469 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-07-21 08:28:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-21 08:28:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 213. [2022-07-21 08:28:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 189 states have (on average 1.2698412698412698) internal successors, (240), 192 states have internal predecessors, (240), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-21 08:28:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 279 transitions. [2022-07-21 08:28:23,160 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 279 transitions. Word has length 45 [2022-07-21 08:28:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:23,161 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 279 transitions. [2022-07-21 08:28:23,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 279 transitions. [2022-07-21 08:28:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 08:28:23,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:23,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:23,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:23,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:23,373 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1895517033, now seen corresponding path program 1 times [2022-07-21 08:28:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:23,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706329313] [2022-07-21 08:28:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:23,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:23,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:23,375 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:23,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 08:28:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:23,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:28:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:23,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:23,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706329313] [2022-07-21 08:28:23,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706329313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:23,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:23,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:28:23,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143944686] [2022-07-21 08:28:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:23,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:28:23,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:23,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:28:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:28:23,573 INFO L87 Difference]: Start difference. First operand 213 states and 279 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:23,689 INFO L93 Difference]: Finished difference Result 352 states and 474 transitions. [2022-07-21 08:28:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:28:23,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-07-21 08:28:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:23,692 INFO L225 Difference]: With dead ends: 352 [2022-07-21 08:28:23,692 INFO L226 Difference]: Without dead ends: 300 [2022-07-21 08:28:23,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:23,693 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 77 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:23,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 315 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 08:28:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-21 08:28:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 232. [2022-07-21 08:28:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 207 states have (on average 1.2753623188405796) internal successors, (264), 209 states have internal predecessors, (264), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (23), 20 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-21 08:28:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 305 transitions. [2022-07-21 08:28:23,710 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 305 transitions. Word has length 46 [2022-07-21 08:28:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:23,710 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 305 transitions. [2022-07-21 08:28:23,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 305 transitions. [2022-07-21 08:28:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 08:28:23,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:23,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:23,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:23,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:23,922 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:23,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1657751029, now seen corresponding path program 1 times [2022-07-21 08:28:23,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:23,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958671530] [2022-07-21 08:28:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:23,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:23,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:23,925 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:23,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 08:28:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:23,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:28:23,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:24,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:24,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958671530] [2022-07-21 08:28:24,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958671530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:24,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:24,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:28:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134593253] [2022-07-21 08:28:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:24,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:28:24,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:24,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:28:24,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:28:24,055 INFO L87 Difference]: Start difference. First operand 232 states and 305 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:24,157 INFO L93 Difference]: Finished difference Result 247 states and 321 transitions. [2022-07-21 08:28:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:28:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-21 08:28:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:24,160 INFO L225 Difference]: With dead ends: 247 [2022-07-21 08:28:24,160 INFO L226 Difference]: Without dead ends: 208 [2022-07-21 08:28:24,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:24,162 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:24,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:28:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-21 08:28:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-07-21 08:28:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.289617486338798) internal successors, (236), 186 states have internal predecessors, (236), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-21 08:28:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2022-07-21 08:28:24,185 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 49 [2022-07-21 08:28:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:24,186 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2022-07-21 08:28:24,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2022-07-21 08:28:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 08:28:24,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:24,188 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:24,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:24,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:24,398 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1176937396, now seen corresponding path program 1 times [2022-07-21 08:28:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429329446] [2022-07-21 08:28:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:24,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:24,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:24,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:24,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 08:28:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 08:28:24,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:24,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:24,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429329446] [2022-07-21 08:28:24,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429329446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:24,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:24,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:28:24,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577562876] [2022-07-21 08:28:24,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:24,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:28:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:28:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:24,597 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:25,089 INFO L93 Difference]: Finished difference Result 335 states and 446 transitions. [2022-07-21 08:28:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:28:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-21 08:28:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:25,091 INFO L225 Difference]: With dead ends: 335 [2022-07-21 08:28:25,091 INFO L226 Difference]: Without dead ends: 293 [2022-07-21 08:28:25,092 INFO L412 NwaCegarLoop]: 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 [2022-07-21 08:28:25,092 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 216 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:25,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 405 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 08:28:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-21 08:28:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 208. [2022-07-21 08:28:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.278688524590164) internal successors, (234), 186 states have internal predecessors, (234), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-21 08:28:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 273 transitions. [2022-07-21 08:28:25,116 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 273 transitions. Word has length 50 [2022-07-21 08:28:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:25,117 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 273 transitions. [2022-07-21 08:28:25,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 273 transitions. [2022-07-21 08:28:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 08:28:25,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:25,119 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:25,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:25,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:25,329 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:25,330 INFO L85 PathProgramCache]: Analyzing trace with hash -475872818, now seen corresponding path program 1 times [2022-07-21 08:28:25,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:25,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614406396] [2022-07-21 08:28:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:25,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:25,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:25,332 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:25,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 08:28:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:28:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:25,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:25,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614406396] [2022-07-21 08:28:25,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614406396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:25,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:25,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:28:25,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943863255] [2022-07-21 08:28:25,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:25,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:28:25,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:25,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:28:25,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:28:25,480 INFO L87 Difference]: Start difference. First operand 208 states and 273 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:25,750 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2022-07-21 08:28:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:28:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-21 08:28:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:25,752 INFO L225 Difference]: With dead ends: 326 [2022-07-21 08:28:25,752 INFO L226 Difference]: Without dead ends: 295 [2022-07-21 08:28:25,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:25,753 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 113 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:25,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 261 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 08:28:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-21 08:28:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 212. [2022-07-21 08:28:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 187 states have (on average 1.2727272727272727) internal successors, (238), 190 states have internal predecessors, (238), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-21 08:28:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 277 transitions. [2022-07-21 08:28:25,765 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 277 transitions. Word has length 50 [2022-07-21 08:28:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:25,766 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 277 transitions. [2022-07-21 08:28:25,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 277 transitions. [2022-07-21 08:28:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 08:28:25,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:25,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:25,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:25,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:25,978 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:25,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:25,978 INFO L85 PathProgramCache]: Analyzing trace with hash 33068664, now seen corresponding path program 1 times [2022-07-21 08:28:25,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:25,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705855715] [2022-07-21 08:28:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:25,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:25,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:25,980 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:25,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 08:28:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:26,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 08:28:26,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:26,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:26,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705855715] [2022-07-21 08:28:26,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705855715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:26,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:26,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:28:26,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477869289] [2022-07-21 08:28:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:26,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:28:26,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:28:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:28:26,352 INFO L87 Difference]: Start difference. First operand 212 states and 277 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:27,629 INFO L93 Difference]: Finished difference Result 328 states and 444 transitions. [2022-07-21 08:28:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:28:27,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-21 08:28:27,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:27,632 INFO L225 Difference]: With dead ends: 328 [2022-07-21 08:28:27,632 INFO L226 Difference]: Without dead ends: 304 [2022-07-21 08:28:27,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:28:27,633 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 180 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:27,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 578 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 08:28:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-21 08:28:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249. [2022-07-21 08:28:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 220 states have (on average 1.268181818181818) internal successors, (279), 224 states have internal predecessors, (279), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-21 08:28:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 326 transitions. [2022-07-21 08:28:27,653 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 326 transitions. Word has length 51 [2022-07-21 08:28:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:27,653 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 326 transitions. [2022-07-21 08:28:27,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 326 transitions. [2022-07-21 08:28:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 08:28:27,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:27,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:27,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:27,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:27,865 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2004133062, now seen corresponding path program 1 times [2022-07-21 08:28:27,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:27,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926922850] [2022-07-21 08:28:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:27,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:27,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:27,868 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:27,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 08:28:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:27,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:28:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:28,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:28,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926922850] [2022-07-21 08:28:28,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926922850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:28,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:28,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:28:28,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63687856] [2022-07-21 08:28:28,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:28,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:28:28,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:28:28,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:28:28,078 INFO L87 Difference]: Start difference. First operand 249 states and 326 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:28,195 INFO L93 Difference]: Finished difference Result 302 states and 390 transitions. [2022-07-21 08:28:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:28:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-21 08:28:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:28,197 INFO L225 Difference]: With dead ends: 302 [2022-07-21 08:28:28,197 INFO L226 Difference]: Without dead ends: 268 [2022-07-21 08:28:28,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:28,198 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 87 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:28,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 273 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 08:28:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-21 08:28:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 249. [2022-07-21 08:28:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 220 states have (on average 1.2136363636363636) internal successors, (267), 224 states have internal predecessors, (267), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-21 08:28:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2022-07-21 08:28:28,213 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 51 [2022-07-21 08:28:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:28,214 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2022-07-21 08:28:28,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2022-07-21 08:28:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 08:28:28,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:28,215 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:28,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:28,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:28,426 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2071979516, now seen corresponding path program 1 times [2022-07-21 08:28:28,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:28,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899355473] [2022-07-21 08:28:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:28,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:28,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:28,428 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:28,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 08:28:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:28:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:28,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:28,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:28,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899355473] [2022-07-21 08:28:28,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899355473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:28,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:28,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:28:28,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928169883] [2022-07-21 08:28:28,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:28,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:28:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:28:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:28:28,556 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:28,649 INFO L93 Difference]: Finished difference Result 258 states and 322 transitions. [2022-07-21 08:28:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:28:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-21 08:28:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:28,652 INFO L225 Difference]: With dead ends: 258 [2022-07-21 08:28:28,652 INFO L226 Difference]: Without dead ends: 213 [2022-07-21 08:28:28,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:28:28,653 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:28,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 08:28:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-21 08:28:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2022-07-21 08:28:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 181 states have (on average 1.2209944751381216) internal successors, (221), 186 states have internal predecessors, (221), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 18 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-21 08:28:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 259 transitions. [2022-07-21 08:28:28,674 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 259 transitions. Word has length 51 [2022-07-21 08:28:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:28,674 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 259 transitions. [2022-07-21 08:28:28,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 259 transitions. [2022-07-21 08:28:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 08:28:28,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:28,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:28,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:28,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:28,886 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 447980418, now seen corresponding path program 1 times [2022-07-21 08:28:28,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:28,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411170049] [2022-07-21 08:28:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:28,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:28,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:28,888 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:28,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 08:28:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 08:28:28,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:29,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:28:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:28:29,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:29,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411170049] [2022-07-21 08:28:29,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411170049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:28:29,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 08:28:29,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-21 08:28:29,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969793] [2022-07-21 08:28:29,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 08:28:29,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:28:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:29,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:28:29,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:28:29,782 INFO L87 Difference]: Start difference. First operand 207 states and 259 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:30,283 INFO L93 Difference]: Finished difference Result 232 states and 286 transitions. [2022-07-21 08:28:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:28:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-07-21 08:28:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:30,284 INFO L225 Difference]: With dead ends: 232 [2022-07-21 08:28:30,284 INFO L226 Difference]: Without dead ends: 201 [2022-07-21 08:28:30,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:28:30,285 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 78 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:30,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 566 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 08:28:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-21 08:28:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 185. [2022-07-21 08:28:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 159 states have (on average 1.2264150943396226) internal successors, (195), 165 states have internal predecessors, (195), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-21 08:28:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2022-07-21 08:28:30,297 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 51 [2022-07-21 08:28:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:30,297 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2022-07-21 08:28:30,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 08:28:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2022-07-21 08:28:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 08:28:30,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:30,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:30,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:30,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:30,509 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash -826993692, now seen corresponding path program 1 times [2022-07-21 08:28:30,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:30,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810659193] [2022-07-21 08:28:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:30,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:30,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:30,512 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:30,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 08:28:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 08:28:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 08:28:30,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:30,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:30,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810659193] [2022-07-21 08:28:30,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810659193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:30,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:30,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:28:30,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282383074] [2022-07-21 08:28:30,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:30,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:28:30,816 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:31,765 INFO L93 Difference]: Finished difference Result 271 states and 349 transitions. [2022-07-21 08:28:31,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:28:31,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-07-21 08:28:31,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:31,767 INFO L225 Difference]: With dead ends: 271 [2022-07-21 08:28:31,767 INFO L226 Difference]: Without dead ends: 222 [2022-07-21 08:28:31,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:28:31,768 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 89 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:31,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 532 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 08:28:31,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-21 08:28:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 159. [2022-07-21 08:28:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 139 states have internal predecessors, (166), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 08:28:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2022-07-21 08:28:31,780 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 53 [2022-07-21 08:28:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:31,780 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2022-07-21 08:28:31,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 08:28:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2022-07-21 08:28:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 08:28:31,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:31,781 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:31,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:31,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:31,983 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:31,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash 841846950, now seen corresponding path program 1 times [2022-07-21 08:28:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:31,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485834970] [2022-07-21 08:28:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:31,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:31,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:31,985 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:31,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 08:28:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:32,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:28:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:36,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:36,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:36,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485834970] [2022-07-21 08:28:36,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485834970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:36,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:36,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:28:36,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435289160] [2022-07-21 08:28:36,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:36,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:28:36,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:36,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:28:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=37, Unknown=2, NotChecked=0, Total=56 [2022-07-21 08:28:36,813 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 08:28:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:36,955 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2022-07-21 08:28:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:28:36,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-07-21 08:28:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:36,957 INFO L225 Difference]: With dead ends: 168 [2022-07-21 08:28:36,957 INFO L226 Difference]: Without dead ends: 166 [2022-07-21 08:28:36,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=21, Invalid=49, Unknown=2, NotChecked=0, Total=72 [2022-07-21 08:28:36,958 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 9 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:36,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 504 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-21 08:28:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-21 08:28:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-07-21 08:28:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 145 states have internal predecessors, (169), 23 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-21 08:28:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 213 transitions. [2022-07-21 08:28:36,974 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 213 transitions. Word has length 55 [2022-07-21 08:28:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:36,975 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 213 transitions. [2022-07-21 08:28:36,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 08:28:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 213 transitions. [2022-07-21 08:28:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 08:28:36,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:36,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:36,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:37,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:37,187 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:37,187 INFO L85 PathProgramCache]: Analyzing trace with hash 12170841, now seen corresponding path program 1 times [2022-07-21 08:28:37,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:37,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255840803] [2022-07-21 08:28:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:37,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:37,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:37,189 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:37,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 08:28:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:28:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:45,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:45,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:45,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255840803] [2022-07-21 08:28:45,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255840803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:45,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:45,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 08:28:45,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487951920] [2022-07-21 08:28:45,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:45,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 08:28:45,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:45,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 08:28:45,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=37, Unknown=3, NotChecked=0, Total=56 [2022-07-21 08:28:45,280 INFO L87 Difference]: Start difference. First operand 166 states and 213 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 08:28:45,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:45,432 INFO L93 Difference]: Finished difference Result 213 states and 272 transitions. [2022-07-21 08:28:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:28:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-07-21 08:28:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:45,434 INFO L225 Difference]: With dead ends: 213 [2022-07-21 08:28:45,434 INFO L226 Difference]: Without dead ends: 211 [2022-07-21 08:28:45,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=20, Invalid=49, Unknown=3, NotChecked=0, Total=72 [2022-07-21 08:28:45,436 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 37 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:45,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 548 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-07-21 08:28:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-21 08:28:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2022-07-21 08:28:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 142 states have internal predecessors, (169), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 08:28:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 207 transitions. [2022-07-21 08:28:45,452 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 207 transitions. Word has length 56 [2022-07-21 08:28:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:45,452 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 207 transitions. [2022-07-21 08:28:45,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 08:28:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 207 transitions. [2022-07-21 08:28:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 08:28:45,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:45,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:45,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:45,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:45,664 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:45,664 INFO L85 PathProgramCache]: Analyzing trace with hash 590846065, now seen corresponding path program 1 times [2022-07-21 08:28:45,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:45,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298986264] [2022-07-21 08:28:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:45,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:45,666 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:45,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 08:28:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 08:28:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:47,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:47,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:47,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298986264] [2022-07-21 08:28:47,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298986264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:47,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:47,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 08:28:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228353248] [2022-07-21 08:28:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:47,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:28:47,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:28:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:28:47,301 INFO L87 Difference]: Start difference. First operand 163 states and 207 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 08:28:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:51,627 INFO L93 Difference]: Finished difference Result 238 states and 304 transitions. [2022-07-21 08:28:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:28:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-07-21 08:28:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:51,633 INFO L225 Difference]: With dead ends: 238 [2022-07-21 08:28:51,633 INFO L226 Difference]: Without dead ends: 226 [2022-07-21 08:28:51,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-21 08:28:51,634 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 164 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:51,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1081 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-21 08:28:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-21 08:28:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 163. [2022-07-21 08:28:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2279411764705883) internal successors, (167), 142 states have internal predecessors, (167), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 08:28:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 205 transitions. [2022-07-21 08:28:51,662 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 205 transitions. Word has length 59 [2022-07-21 08:28:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:51,663 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 205 transitions. [2022-07-21 08:28:51,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 08:28:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 205 transitions. [2022-07-21 08:28:51,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 08:28:51,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:51,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:51,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:51,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:51,876 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash -407457257, now seen corresponding path program 1 times [2022-07-21 08:28:51,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:51,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061146002] [2022-07-21 08:28:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:51,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:51,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:51,879 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:51,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 08:28:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:28:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:52,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:52,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061146002] [2022-07-21 08:28:52,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061146002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:52,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:52,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:28:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301022668] [2022-07-21 08:28:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:52,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:52,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:28:52,097 INFO L87 Difference]: Start difference. First operand 163 states and 205 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 08:28:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:52,400 INFO L93 Difference]: Finished difference Result 182 states and 225 transitions. [2022-07-21 08:28:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:28:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2022-07-21 08:28:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:52,401 INFO L225 Difference]: With dead ends: 182 [2022-07-21 08:28:52,401 INFO L226 Difference]: Without dead ends: 180 [2022-07-21 08:28:52,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:28:52,402 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 40 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:52,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 504 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 08:28:52,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-21 08:28:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2022-07-21 08:28:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 139 states have (on average 1.223021582733813) internal successors, (170), 145 states have internal predecessors, (170), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 08:28:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 208 transitions. [2022-07-21 08:28:52,419 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 208 transitions. Word has length 61 [2022-07-21 08:28:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:52,419 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 208 transitions. [2022-07-21 08:28:52,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 08:28:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 208 transitions. [2022-07-21 08:28:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 08:28:52,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:52,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:52,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-21 08:28:52,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:52,630 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1933907116, now seen corresponding path program 1 times [2022-07-21 08:28:52,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:52,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148699875] [2022-07-21 08:28:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:52,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:52,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:52,632 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:52,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 08:28:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 08:28:52,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:53,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:53,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148699875] [2022-07-21 08:28:53,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148699875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:53,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:53,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 08:28:53,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250549477] [2022-07-21 08:28:53,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:53,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 08:28:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:53,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 08:28:53,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-21 08:28:53,899 INFO L87 Difference]: Start difference. First operand 167 states and 208 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 08:28:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:58,883 INFO L93 Difference]: Finished difference Result 432 states and 559 transitions. [2022-07-21 08:28:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 08:28:58,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-07-21 08:28:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:58,885 INFO L225 Difference]: With dead ends: 432 [2022-07-21 08:28:58,885 INFO L226 Difference]: Without dead ends: 400 [2022-07-21 08:28:58,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-07-21 08:28:58,886 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 460 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:58,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1007 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-21 08:28:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-07-21 08:28:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 197. [2022-07-21 08:28:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 173 states have internal predecessors, (200), 23 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-21 08:28:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2022-07-21 08:28:58,914 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 61 [2022-07-21 08:28:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:58,914 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2022-07-21 08:28:58,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 08:28:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2022-07-21 08:28:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 08:28:58,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:58,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:58,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:59,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:59,123 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash -131344237, now seen corresponding path program 1 times [2022-07-21 08:28:59,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:59,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962526389] [2022-07-21 08:28:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:59,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:59,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:59,126 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:59,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 08:28:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:28:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:28:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 08:28:59,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:28:59,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:28:59,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962526389] [2022-07-21 08:28:59,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962526389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:28:59,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:28:59,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:28:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802812724] [2022-07-21 08:28:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:28:59,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:28:59,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:28:59,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:28:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:28:59,356 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 08:28:59,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:28:59,657 INFO L93 Difference]: Finished difference Result 219 states and 270 transitions. [2022-07-21 08:28:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:28:59,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2022-07-21 08:28:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:28:59,658 INFO L225 Difference]: With dead ends: 219 [2022-07-21 08:28:59,659 INFO L226 Difference]: Without dead ends: 217 [2022-07-21 08:28:59,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 08:28:59,659 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 34 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 08:28:59,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 500 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 08:28:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-21 08:28:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 202. [2022-07-21 08:28:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 169 states have (on average 1.2011834319526626) internal successors, (203), 177 states have internal predecessors, (203), 24 states have call successors, (24), 7 states have call predecessors, (24), 8 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-21 08:28:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 249 transitions. [2022-07-21 08:28:59,682 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 249 transitions. Word has length 61 [2022-07-21 08:28:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:28:59,682 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 249 transitions. [2022-07-21 08:28:59,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 08:28:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 249 transitions. [2022-07-21 08:28:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 08:28:59,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:28:59,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:28:59,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 08:28:59,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:28:59,894 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:28:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:28:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash -943451417, now seen corresponding path program 1 times [2022-07-21 08:28:59,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:28:59,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959481178] [2022-07-21 08:28:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:28:59,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:28:59,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:28:59,896 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:28:59,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 08:28:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:28:59,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 08:28:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:29:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 08:29:03,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:29:03,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:29:03,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959481178] [2022-07-21 08:29:03,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959481178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:29:03,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:29:03,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 08:29:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113350599] [2022-07-21 08:29:03,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:29:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:29:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:29:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:29:03,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:29:03,175 INFO L87 Difference]: Start difference. First operand 202 states and 249 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 08:29:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:29:03,944 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2022-07-21 08:29:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 08:29:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-07-21 08:29:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:29:03,947 INFO L225 Difference]: With dead ends: 364 [2022-07-21 08:29:03,947 INFO L226 Difference]: Without dead ends: 344 [2022-07-21 08:29:03,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-21 08:29:03,948 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 66 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:29:03,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1287 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 525 Unchecked, 0.3s Time] [2022-07-21 08:29:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-21 08:29:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2022-07-21 08:29:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 176 states have (on average 1.2045454545454546) internal successors, (212), 184 states have internal predecessors, (212), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-21 08:29:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 260 transitions. [2022-07-21 08:29:03,976 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 260 transitions. Word has length 66 [2022-07-21 08:29:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:29:03,976 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 260 transitions. [2022-07-21 08:29:03,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 08:29:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 260 transitions. [2022-07-21 08:29:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 08:29:03,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:29:03,978 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:29:03,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 08:29:04,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:29:04,189 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:29:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:29:04,189 INFO L85 PathProgramCache]: Analyzing trace with hash 979776617, now seen corresponding path program 1 times [2022-07-21 08:29:04,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:29:04,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735547967] [2022-07-21 08:29:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:29:04,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:29:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:29:04,191 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:29:04,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-21 08:29:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:29:04,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 08:29:04,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:29:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 08:29:07,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:29:07,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:29:07,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735547967] [2022-07-21 08:29:07,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735547967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:29:07,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:29:07,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 08:29:07,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29112091] [2022-07-21 08:29:07,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:29:07,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:29:07,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:29:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:29:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2022-07-21 08:29:07,773 INFO L87 Difference]: Start difference. First operand 210 states and 260 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 08:29:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:29:08,205 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-07-21 08:29:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:29:08,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-07-21 08:29:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:29:08,207 INFO L225 Difference]: With dead ends: 263 [2022-07-21 08:29:08,207 INFO L226 Difference]: Without dead ends: 243 [2022-07-21 08:29:08,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2022-07-21 08:29:08,208 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 7 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 08:29:08,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 581 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2022-07-21 08:29:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-21 08:29:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2022-07-21 08:29:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 175 states have (on average 1.2) internal successors, (210), 183 states have internal predecessors, (210), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-21 08:29:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2022-07-21 08:29:08,235 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 66 [2022-07-21 08:29:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:29:08,236 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2022-07-21 08:29:08,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 08:29:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2022-07-21 08:29:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 08:29:08,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:29:08,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:29:08,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-21 08:29:08,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 08:29:08,447 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:29:08,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:29:08,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1210749100, now seen corresponding path program 1 times [2022-07-21 08:29:08,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:29:08,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180589390] [2022-07-21 08:29:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:29:08,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:29:08,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:29:08,449 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:29:08,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 08:29:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:29:08,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 08:29:08,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:29:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:29:11,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:29:12,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:29:12,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180589390] [2022-07-21 08:29:12,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180589390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:29:12,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [498530800] [2022-07-21 08:29:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:29:12,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 08:29:12,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 08:29:12,091 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 08:29:12,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-21 08:29:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:29:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 08:29:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:29:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 08:29:13,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:29:13,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [498530800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:29:13,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:29:13,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 13 [2022-07-21 08:29:13,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286245221] [2022-07-21 08:29:13,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:29:13,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 08:29:13,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:29:13,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 08:29:13,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:29:13,046 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 08:29:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 08:29:14,128 INFO L93 Difference]: Finished difference Result 346 states and 433 transitions. [2022-07-21 08:29:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 08:29:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2022-07-21 08:29:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 08:29:14,131 INFO L225 Difference]: With dead ends: 346 [2022-07-21 08:29:14,131 INFO L226 Difference]: Without dead ends: 326 [2022-07-21 08:29:14,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-07-21 08:29:14,132 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 62 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 08:29:14,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1028 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 280 Unchecked, 0.3s Time] [2022-07-21 08:29:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-21 08:29:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 211. [2022-07-21 08:29:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 177 states have (on average 1.2090395480225988) internal successors, (214), 185 states have internal predecessors, (214), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-21 08:29:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 262 transitions. [2022-07-21 08:29:14,164 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 262 transitions. Word has length 67 [2022-07-21 08:29:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 08:29:14,164 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 262 transitions. [2022-07-21 08:29:14,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 08:29:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 262 transitions. [2022-07-21 08:29:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 08:29:14,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 08:29:14,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:29:14,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 08:29:14,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-07-21 08:29:14,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 08:29:14,577 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:29:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:29:14,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1980026946, now seen corresponding path program 1 times [2022-07-21 08:29:14,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 08:29:14,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765571499] [2022-07-21 08:29:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:29:14,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 08:29:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 08:29:14,579 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 08:29:14,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 08:29:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:29:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 08:29:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:29:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 08:29:16,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:29:16,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 08:29:16,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765571499] [2022-07-21 08:29:16,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765571499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:29:16,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:29:16,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 08:29:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372610363] [2022-07-21 08:29:16,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:29:16,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 08:29:16,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 08:29:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 08:29:16,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-21 08:29:16,376 INFO L87 Difference]: Start difference. First operand 211 states and 262 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)