./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/array-cav19/array_min_and_copy_shift_sum_add.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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 22:43:22,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 22:43:22,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 22:43:22,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 22:43:22,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 22:43:22,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 22:43:22,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 22:43:22,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 22:43:22,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 22:43:22,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 22:43:22,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 22:43:22,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 22:43:22,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 22:43:22,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 22:43:22,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 22:43:22,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 22:43:22,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 22:43:22,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 22:43:22,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 22:43:22,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 22:43:22,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 22:43:22,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 22:43:22,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 22:43:22,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 22:43:22,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 22:43:22,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 22:43:22,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 22:43:22,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 22:43:22,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 22:43:22,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 22:43:22,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 22:43:22,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 22:43:22,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 22:43:22,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 22:43:22,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 22:43:22,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 22:43:22,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 22:43:22,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 22:43:22,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 22:43:22,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 22:43:22,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 22:43:22,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 22:43:22,391 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 22:43:22,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 22:43:22,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 22:43:22,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 22:43:22,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 22:43:22,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 22:43:22,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 22:43:22,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 22:43:22,393 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 22:43:22,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 22:43:22,394 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 22:43:22,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 22:43:22,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 22:43:22,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 22:43:22,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 22:43:22,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 22:43:22,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 22:43:22,395 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 22:43:22,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 22:43:22,395 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 22:43:22,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 22:43:22,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 22:43:22,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 22:43:22,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 22:43:22,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:43:22,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 22:43:22,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 22:43:22,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 22:43:22,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 22:43:22,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 22:43:22,397 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 22:43:22,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 22:43:22,398 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 22:43:22,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 22:43:22,398 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 22:43:22,398 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2023-02-13 22:43:22,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 22:43:22,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 22:43:22,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 22:43:22,604 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 22:43:22,605 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 22:43:22,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-13 22:43:23,609 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 22:43:23,771 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 22:43:23,771 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-13 22:43:23,777 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b729b60b0/de5f6559fac74b7b9654065cd7b64b32/FLAG46ba3a61d [2023-02-13 22:43:23,787 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b729b60b0/de5f6559fac74b7b9654065cd7b64b32 [2023-02-13 22:43:23,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 22:43:23,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 22:43:23,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 22:43:23,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 22:43:23,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 22:43:23,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:23,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64e2561e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23, skipping insertion in model container [2023-02-13 22:43:23,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:23,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 22:43:23,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 22:43:23,904 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-02-13 22:43:23,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:43:23,924 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 22:43:23,933 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-02-13 22:43:23,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:43:23,953 INFO L208 MainTranslator]: Completed translation [2023-02-13 22:43:23,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23 WrapperNode [2023-02-13 22:43:23,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 22:43:23,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 22:43:23,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 22:43:23,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 22:43:23,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:23,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:23,977 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-02-13 22:43:23,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 22:43:23,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 22:43:23,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 22:43:23,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 22:43:23,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:23,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:23,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:23,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:24,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:24,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:24,005 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:24,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:24,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 22:43:24,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 22:43:24,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 22:43:24,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 22:43:24,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (1/1) ... [2023-02-13 22:43:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:43:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:24,032 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) [2023-02-13 22:43:24,034 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 [2023-02-13 22:43:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 22:43:24,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-13 22:43:24,061 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-13 22:43:24,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 22:43:24,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 22:43:24,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 22:43:24,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 22:43:24,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 22:43:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 22:43:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 22:43:24,111 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 22:43:24,113 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 22:43:24,300 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 22:43:24,305 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 22:43:24,306 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-13 22:43:24,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:43:24 BoogieIcfgContainer [2023-02-13 22:43:24,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 22:43:24,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 22:43:24,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 22:43:24,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 22:43:24,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 10:43:23" (1/3) ... [2023-02-13 22:43:24,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea507e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:43:24, skipping insertion in model container [2023-02-13 22:43:24,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:43:23" (2/3) ... [2023-02-13 22:43:24,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea507e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:43:24, skipping insertion in model container [2023-02-13 22:43:24,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:43:24" (3/3) ... [2023-02-13 22:43:24,323 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2023-02-13 22:43:24,334 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 22:43:24,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 22:43:24,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 22:43:24,372 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@370de88f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 22:43:24,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 22:43:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:43:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-13 22:43:24,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:24,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:24,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:24,385 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2023-02-13 22:43:24,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:24,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901758348] [2023-02-13 22:43:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:24,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:24,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 22:43:24,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901758348] [2023-02-13 22:43:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901758348] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:43:24,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:43:24,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 22:43:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275867913] [2023-02-13 22:43:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:43:24,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 22:43:24,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 22:43:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:43:24,767 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:43:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:24,804 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2023-02-13 22:43:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-13 22:43:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-13 22:43:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:24,810 INFO L225 Difference]: With dead ends: 64 [2023-02-13 22:43:24,810 INFO L226 Difference]: Without dead ends: 27 [2023-02-13 22:43:24,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 22:43:24,815 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:24,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:43:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-13 22:43:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-13 22:43:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:43:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-13 22:43:24,855 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2023-02-13 22:43:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:24,856 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-13 22:43:24,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:43:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-13 22:43:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-13 22:43:24,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:24,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:24,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 22:43:24,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2023-02-13 22:43:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:24,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731797216] [2023-02-13 22:43:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:24,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:24,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 22:43:24,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:24,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731797216] [2023-02-13 22:43:24,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731797216] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:43:24,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:43:24,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 22:43:24,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394107972] [2023-02-13 22:43:24,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:43:24,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 22:43:24,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:24,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 22:43:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 22:43:24,978 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 22:43:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:25,041 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-02-13 22:43:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 22:43:25,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-13 22:43:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:25,042 INFO L225 Difference]: With dead ends: 50 [2023-02-13 22:43:25,042 INFO L226 Difference]: Without dead ends: 36 [2023-02-13 22:43:25,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 22:43:25,046 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:25,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-13 22:43:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-02-13 22:43:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 22:43:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-13 22:43:25,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2023-02-13 22:43:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:25,054 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-13 22:43:25,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 22:43:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-13 22:43:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-13 22:43:25,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:25,057 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-13 22:43:25,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 22:43:25,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:25,061 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2023-02-13 22:43:25,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:25,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633008260] [2023-02-13 22:43:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:25,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:25,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:25,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:25,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:43:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 22:43:25,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633008260] [2023-02-13 22:43:25,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633008260] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99050838] [2023-02-13 22:43:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:25,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:25,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:43:25,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 22:43:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:25,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-13 22:43:25,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:25,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-13 22:43:25,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-13 22:43:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 22:43:25,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:28,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:28,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-02-13 22:43:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 22:43:28,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99050838] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:28,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:28,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-02-13 22:43:28,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733988039] [2023-02-13 22:43:28,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:28,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-13 22:43:28,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-13 22:43:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=330, Unknown=1, NotChecked=0, Total=420 [2023-02-13 22:43:28,059 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 22:43:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:28,244 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-13 22:43:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-13 22:43:28,245 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-13 22:43:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:28,246 INFO L225 Difference]: With dead ends: 54 [2023-02-13 22:43:28,246 INFO L226 Difference]: Without dead ends: 50 [2023-02-13 22:43:28,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2023-02-13 22:43:28,261 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:28,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 159 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-13 22:43:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-13 22:43:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-13 22:43:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-13 22:43:28,267 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-13 22:43:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:28,267 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-13 22:43:28,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 22:43:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-13 22:43:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-13 22:43:28,268 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:28,269 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-13 22:43:28,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:28,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:28,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:28,474 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2023-02-13 22:43:28,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:28,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73112954] [2023-02-13 22:43:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:28,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:28,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:28,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:43:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 22:43:28,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73112954] [2023-02-13 22:43:28,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73112954] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969181297] [2023-02-13 22:43:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:28,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:28,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:28,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:43:28,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 22:43:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-13 22:43:28,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:29,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-13 22:43:29,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-13 22:43:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 22:43:29,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:29,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:29,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-02-13 22:43:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 22:43:29,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969181297] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:29,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:29,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2023-02-13 22:43:29,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177028672] [2023-02-13 22:43:29,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:29,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-13 22:43:29,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:29,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-13 22:43:29,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-02-13 22:43:29,159 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 22:43:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:29,349 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-02-13 22:43:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-13 22:43:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-13 22:43:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:29,351 INFO L225 Difference]: With dead ends: 68 [2023-02-13 22:43:29,351 INFO L226 Difference]: Without dead ends: 64 [2023-02-13 22:43:29,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-02-13 22:43:29,352 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:29,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-13 22:43:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2023-02-13 22:43:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-13 22:43:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-13 22:43:29,358 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-13 22:43:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:29,358 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-13 22:43:29,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 22:43:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-13 22:43:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-13 22:43:29,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:29,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:29,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:29,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-13 22:43:29,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2023-02-13 22:43:29,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:29,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554707938] [2023-02-13 22:43:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:29,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:29,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:29,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:29,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:43:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 22:43:29,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:29,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554707938] [2023-02-13 22:43:29,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554707938] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716182575] [2023-02-13 22:43:29,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:43:29,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:29,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:29,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:43:29,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 22:43:29,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:43:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 22:43:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 22:43:29,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 22:43:29,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716182575] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:29,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:29,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-13 22:43:29,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567529862] [2023-02-13 22:43:29,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:29,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-13 22:43:29,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:29,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-13 22:43:29,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-13 22:43:29,809 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-13 22:43:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:29,897 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2023-02-13 22:43:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 22:43:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2023-02-13 22:43:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:29,902 INFO L225 Difference]: With dead ends: 88 [2023-02-13 22:43:29,903 INFO L226 Difference]: Without dead ends: 69 [2023-02-13 22:43:29,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-13 22:43:29,904 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:29,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 83 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-13 22:43:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2023-02-13 22:43:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-13 22:43:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-13 22:43:29,920 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2023-02-13 22:43:29,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:29,921 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-13 22:43:29,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-13 22:43:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-13 22:43:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-13 22:43:29,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:29,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-02-13 22:43:29,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-13 22:43:30,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:30,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2023-02-13 22:43:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:30,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962996837] [2023-02-13 22:43:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:30,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:30,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:43:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:30,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:43:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 22:43:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962996837] [2023-02-13 22:43:30,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962996837] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768888843] [2023-02-13 22:43:30,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:43:30,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:30,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:43:30,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 22:43:30,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-13 22:43:30,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:30,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 22:43:30,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 22:43:30,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 22:43:30,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768888843] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:30,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:30,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-13 22:43:30,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2434726] [2023-02-13 22:43:30,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:30,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-13 22:43:30,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-13 22:43:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-13 22:43:30,382 INFO L87 Difference]: Start difference. First operand 51 states and 65 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, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-13 22:43:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:30,498 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-02-13 22:43:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 22:43:30,498 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, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2023-02-13 22:43:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:30,499 INFO L225 Difference]: With dead ends: 59 [2023-02-13 22:43:30,499 INFO L226 Difference]: Without dead ends: 51 [2023-02-13 22:43:30,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-13 22:43:30,500 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:30,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-13 22:43:30,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-02-13 22:43:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-13 22:43:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-02-13 22:43:30,504 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2023-02-13 22:43:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:30,504 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-02-13 22:43:30,504 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, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-13 22:43:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-02-13 22:43:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-13 22:43:30,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:30,505 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:30,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-13 22:43:30,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:30,710 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2023-02-13 22:43:30,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:30,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355360867] [2023-02-13 22:43:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:30,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:31,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:31,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:31,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:43:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:31,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:43:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 22:43:31,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:31,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355360867] [2023-02-13 22:43:31,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355360867] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:31,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132431711] [2023-02-13 22:43:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:43:31,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:31,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:31,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:43:31,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 22:43:31,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:43:31,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-13 22:43:31,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:31,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:43:32,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:32,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:43:32,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2023-02-13 22:43:32,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:32,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-02-13 22:43:32,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2023-02-13 22:43:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 22:43:32,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:32,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132431711] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:32,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:43:32,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-02-13 22:43:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996768620] [2023-02-13 22:43:32,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:32,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-13 22:43:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-13 22:43:32,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2023-02-13 22:43:32,942 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:43:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:35,352 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2023-02-13 22:43:35,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-13 22:43:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-13 22:43:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:35,353 INFO L225 Difference]: With dead ends: 96 [2023-02-13 22:43:35,353 INFO L226 Difference]: Without dead ends: 92 [2023-02-13 22:43:35,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=841, Invalid=5479, Unknown=0, NotChecked=0, Total=6320 [2023-02-13 22:43:35,355 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:35,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 335 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-13 22:43:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-13 22:43:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2023-02-13 22:43:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 22:43:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2023-02-13 22:43:35,362 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 50 [2023-02-13 22:43:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:35,362 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2023-02-13 22:43:35,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:43:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2023-02-13 22:43:35,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-13 22:43:35,363 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:35,363 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:35,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:35,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:35,571 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:35,571 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2023-02-13 22:43:35,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:35,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325742864] [2023-02-13 22:43:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:35,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:36,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:36,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:43:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:36,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:43:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 22:43:36,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325742864] [2023-02-13 22:43:36,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325742864] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058505057] [2023-02-13 22:43:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:36,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:36,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:36,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:43:36,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 22:43:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:36,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-13 22:43:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:36,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:43:36,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:36,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:36,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:43:36,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2023-02-13 22:43:37,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:37,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-02-13 22:43:37,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-02-13 22:43:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 22:43:37,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:38,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058505057] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:38,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:43:38,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2023-02-13 22:43:38,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452451617] [2023-02-13 22:43:38,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:38,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-13 22:43:38,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:38,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-13 22:43:38,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2023-02-13 22:43:38,264 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:43:41,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:43:41,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:41,637 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2023-02-13 22:43:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-13 22:43:41,638 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-13 22:43:41,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:41,638 INFO L225 Difference]: With dead ends: 100 [2023-02-13 22:43:41,638 INFO L226 Difference]: Without dead ends: 94 [2023-02-13 22:43:41,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2023-02-13 22:43:41,640 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:41,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 290 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 896 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-02-13 22:43:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-13 22:43:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2023-02-13 22:43:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:43:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2023-02-13 22:43:41,647 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 50 [2023-02-13 22:43:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:41,647 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2023-02-13 22:43:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:43:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2023-02-13 22:43:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-13 22:43:41,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:41,648 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:41,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-13 22:43:41,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:41,853 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2023-02-13 22:43:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:41,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925067058] [2023-02-13 22:43:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:41,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:42,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:42,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:42,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:43:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:42,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:43:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 22:43:42,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:42,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925067058] [2023-02-13 22:43:42,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925067058] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:42,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60564452] [2023-02-13 22:43:42,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:43:42,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:42,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:42,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:43:42,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 22:43:42,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:43:42,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-13 22:43:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:42,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:43:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:43,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:43:43,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2023-02-13 22:43:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:43,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-02-13 22:43:43,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2023-02-13 22:43:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 22:43:43,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60564452] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:49,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:43:49,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2023-02-13 22:43:49,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831060822] [2023-02-13 22:43:49,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:49,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-13 22:43:49,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:49,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-13 22:43:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2696, Unknown=2, NotChecked=0, Total=2970 [2023-02-13 22:43:49,586 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:43:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:51,902 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2023-02-13 22:43:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-13 22:43:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-13 22:43:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:51,904 INFO L225 Difference]: With dead ends: 135 [2023-02-13 22:43:51,904 INFO L226 Difference]: Without dead ends: 131 [2023-02-13 22:43:51,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=813, Invalid=5827, Unknown=2, NotChecked=0, Total=6642 [2023-02-13 22:43:51,906 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:51,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 200 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-13 22:43:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-13 22:43:51,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2023-02-13 22:43:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-13 22:43:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2023-02-13 22:43:51,924 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 50 [2023-02-13 22:43:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:51,924 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2023-02-13 22:43:51,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:43:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2023-02-13 22:43:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-13 22:43:51,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:51,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:51,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:52,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:52,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2023-02-13 22:43:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:52,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137297117] [2023-02-13 22:43:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:52,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:43:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:52,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:43:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:52,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:43:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:52,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:43:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 22:43:52,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:52,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137297117] [2023-02-13 22:43:52,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137297117] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:52,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82141737] [2023-02-13 22:43:52,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:43:52,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:52,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:52,983 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:43:52,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 22:43:53,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:43:53,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-13 22:43:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:53,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:43:53,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:53,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:53,383 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:43:53,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2023-02-13 22:43:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:53,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-02-13 22:43:53,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-02-13 22:43:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 22:43:53,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:54,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82141737] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:54,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:43:54,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2023-02-13 22:43:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520822944] [2023-02-13 22:43:54,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:54,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-13 22:43:54,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-13 22:43:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2023-02-13 22:43:54,272 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:43:57,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:44:00,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:44:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:44:00,704 INFO L93 Difference]: Finished difference Result 163 states and 209 transitions. [2023-02-13 22:44:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-13 22:44:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-13 22:44:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:44:00,708 INFO L225 Difference]: With dead ends: 163 [2023-02-13 22:44:00,708 INFO L226 Difference]: Without dead ends: 157 [2023-02-13 22:44:00,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=794, Invalid=5526, Unknown=0, NotChecked=0, Total=6320 [2023-02-13 22:44:00,711 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 79 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 115 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:44:00,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 337 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1232 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2023-02-13 22:44:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-13 22:44:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 90. [2023-02-13 22:44:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:44:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2023-02-13 22:44:00,742 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 50 [2023-02-13 22:44:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:44:00,743 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2023-02-13 22:44:00,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 22:44:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2023-02-13 22:44:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-13 22:44:00,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:44:00,744 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:44:00,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-13 22:44:00,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-13 22:44:00,949 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:44:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:44:00,957 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2023-02-13 22:44:00,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:44:00,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637182644] [2023-02-13 22:44:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:44:00,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:44:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:44:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:44:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:44:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:44:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:44:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:44:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637182644] [2023-02-13 22:44:01,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637182644] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327390727] [2023-02-13 22:44:01,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:44:01,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:44:01,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:44:01,050 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:44:01,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 22:44:01,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-13 22:44:01,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:44:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:44:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:44:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:44:01,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:44:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:44:01,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327390727] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:44:01,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:44:01,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-13 22:44:01,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30378130] [2023-02-13 22:44:01,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:44:01,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 22:44:01,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:44:01,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 22:44:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-13 22:44:01,237 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-13 22:44:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:44:01,366 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2023-02-13 22:44:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-13 22:44:01,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2023-02-13 22:44:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:44:01,368 INFO L225 Difference]: With dead ends: 176 [2023-02-13 22:44:01,368 INFO L226 Difference]: Without dead ends: 138 [2023-02-13 22:44:01,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-13 22:44:01,369 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:44:01,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 87 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:44:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-13 22:44:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 106. [2023-02-13 22:44:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:44:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 136 transitions. [2023-02-13 22:44:01,387 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 136 transitions. Word has length 52 [2023-02-13 22:44:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:44:01,387 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 136 transitions. [2023-02-13 22:44:01,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-13 22:44:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 136 transitions. [2023-02-13 22:44:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-13 22:44:01,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:44:01,389 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:44:01,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-13 22:44:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:44:01,594 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:44:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:44:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2023-02-13 22:44:01,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:44:01,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090457578] [2023-02-13 22:44:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:44:01,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:44:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:44:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:44:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:44:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:44:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:44:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-13 22:44:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:44:01,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090457578] [2023-02-13 22:44:01,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090457578] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:01,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379144656] [2023-02-13 22:44:01,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:44:01,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:44:01,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:44:01,696 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:44:01,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 22:44:01,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-13 22:44:01,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:44:01,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:44:01,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:44:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-13 22:44:01,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:44:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-13 22:44:01,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379144656] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:44:01,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:44:01,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-13 22:44:01,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530695713] [2023-02-13 22:44:01,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:44:01,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 22:44:01,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:44:01,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 22:44:01,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-13 22:44:01,919 INFO L87 Difference]: Start difference. First operand 106 states and 136 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-13 22:44:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:44:02,073 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2023-02-13 22:44:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 22:44:02,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2023-02-13 22:44:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:44:02,074 INFO L225 Difference]: With dead ends: 118 [2023-02-13 22:44:02,074 INFO L226 Difference]: Without dead ends: 108 [2023-02-13 22:44:02,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-13 22:44:02,075 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:44:02,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 127 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:44:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-13 22:44:02,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 49. [2023-02-13 22:44:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-13 22:44:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-13 22:44:02,084 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2023-02-13 22:44:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:44:02,084 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-13 22:44:02,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-13 22:44:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-13 22:44:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:44:02,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:44:02,085 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:44:02,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-13 22:44:02,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-13 22:44:02,290 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:44:02,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:44:02,290 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2023-02-13 22:44:02,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:44:02,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837615722] [2023-02-13 22:44:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:44:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:44:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:03,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:44:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:44:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:03,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:44:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:03,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:44:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:03,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:44:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:44:03,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:44:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837615722] [2023-02-13 22:44:03,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837615722] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980936018] [2023-02-13 22:44:03,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:44:03,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:44:03,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:44:03,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:44:03,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-13 22:44:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:03,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-13 22:44:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:44:03,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:44:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:04,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:04,639 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:44:04,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-13 22:44:04,784 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:44:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:04,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 79 [2023-02-13 22:44:04,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:04,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-13 22:44:05,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-13 22:44:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 22:44:05,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:44:11,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980936018] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:11,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:44:11,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2023-02-13 22:44:11,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545231574] [2023-02-13 22:44:11,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:44:11,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-13 22:44:11,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:44:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-13 22:44:11,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3971, Unknown=1, NotChecked=0, Total=4290 [2023-02-13 22:44:11,475 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:44:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:44:17,642 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2023-02-13 22:44:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-13 22:44:17,642 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-13 22:44:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:44:17,643 INFO L225 Difference]: With dead ends: 164 [2023-02-13 22:44:17,643 INFO L226 Difference]: Without dead ends: 158 [2023-02-13 22:44:17,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4822 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1557, Invalid=14954, Unknown=1, NotChecked=0, Total=16512 [2023-02-13 22:44:17,646 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 205 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:44:17,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 485 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-13 22:44:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-13 22:44:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 114. [2023-02-13 22:44:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 99 states have (on average 1.303030303030303) internal successors, (129), 99 states have internal predecessors, (129), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-13 22:44:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2023-02-13 22:44:17,668 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 64 [2023-02-13 22:44:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:44:17,668 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2023-02-13 22:44:17,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:44:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2023-02-13 22:44:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:44:17,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:44:17,669 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:44:17,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-13 22:44:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-13 22:44:17,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:44:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:44:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2023-02-13 22:44:17,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:44:17,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039321835] [2023-02-13 22:44:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:44:17,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:44:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:44:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:19,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:44:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:44:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:19,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:44:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:19,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:44:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:44:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:44:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039321835] [2023-02-13 22:44:19,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039321835] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225650008] [2023-02-13 22:44:19,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:44:19,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:44:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:44:19,264 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:44:19,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-13 22:44:19,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-13 22:44:19,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:44:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-13 22:44:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:44:19,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:44:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,134 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:44:20,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 59 [2023-02-13 22:44:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2023-02-13 22:44:20,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:20,494 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2023-02-13 22:44:20,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 105 [2023-02-13 22:44:21,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:21,695 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:44:21,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:44:21,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 72 [2023-02-13 22:44:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 22:44:21,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:44:33,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225650008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:33,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:44:33,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2023-02-13 22:44:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881573861] [2023-02-13 22:44:33,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:44:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-13 22:44:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:44:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-13 22:44:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4948, Unknown=4, NotChecked=0, Total=5402 [2023-02-13 22:44:33,276 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:44:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:44:40,884 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2023-02-13 22:44:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-13 22:44:40,884 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-13 22:44:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:44:40,885 INFO L225 Difference]: With dead ends: 182 [2023-02-13 22:44:40,885 INFO L226 Difference]: Without dead ends: 156 [2023-02-13 22:44:40,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4492 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1936, Invalid=14572, Unknown=4, NotChecked=0, Total=16512 [2023-02-13 22:44:40,888 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 183 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:44:40,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 512 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-13 22:44:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-13 22:44:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2023-02-13 22:44:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 101 states have (on average 1.297029702970297) internal successors, (131), 101 states have internal predecessors, (131), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-13 22:44:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2023-02-13 22:44:40,919 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 64 [2023-02-13 22:44:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:44:40,919 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2023-02-13 22:44:40,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:44:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2023-02-13 22:44:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:44:40,921 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:44:40,921 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:44:40,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-13 22:44:41,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-13 22:44:41,127 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:44:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:44:41,127 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2023-02-13 22:44:41,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:44:41,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132886892] [2023-02-13 22:44:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:44:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:44:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:42,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:44:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:42,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:44:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:44:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:42,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:44:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:42,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:44:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:44:42,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:44:42,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132886892] [2023-02-13 22:44:42,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132886892] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:42,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465730008] [2023-02-13 22:44:42,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:44:42,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:44:42,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:44:42,428 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:44:42,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-13 22:44:42,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:44:42,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:44:42,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-13 22:44:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:44:42,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:44:43,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,170 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:44:43,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-13 22:44:43,280 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:44:43,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2023-02-13 22:44:43,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:43,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-13 22:44:43,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-13 22:44:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:44:43,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:44:45,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465730008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:45,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:44:45,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2023-02-13 22:44:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2640347] [2023-02-13 22:44:45,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:44:45,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-13 22:44:45,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:44:45,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-13 22:44:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=4109, Unknown=0, NotChecked=0, Total=4556 [2023-02-13 22:44:45,337 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:44:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:44:49,579 INFO L93 Difference]: Finished difference Result 175 states and 227 transitions. [2023-02-13 22:44:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-13 22:44:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-13 22:44:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:44:49,581 INFO L225 Difference]: With dead ends: 175 [2023-02-13 22:44:49,581 INFO L226 Difference]: Without dead ends: 148 [2023-02-13 22:44:49,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1230, Invalid=9482, Unknown=0, NotChecked=0, Total=10712 [2023-02-13 22:44:49,582 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:44:49,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-13 22:44:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-13 22:44:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 131. [2023-02-13 22:44:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 115 states have internal predecessors, (148), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-13 22:44:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 174 transitions. [2023-02-13 22:44:49,613 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 174 transitions. Word has length 64 [2023-02-13 22:44:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:44:49,614 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 174 transitions. [2023-02-13 22:44:49,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:44:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 174 transitions. [2023-02-13 22:44:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:44:49,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:44:49,615 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:44:49,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-13 22:44:49,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-13 22:44:49,820 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:44:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:44:49,821 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2023-02-13 22:44:49,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:44:49,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387487813] [2023-02-13 22:44:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:44:49,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:44:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:51,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:44:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:51,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:44:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:51,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:44:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:51,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:44:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:51,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:44:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:44:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:44:51,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:44:51,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387487813] [2023-02-13 22:44:51,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387487813] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:51,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454452037] [2023-02-13 22:44:51,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:44:51,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:44:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:44:51,066 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:44:51,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-13 22:44:51,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-13 22:44:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:44:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-13 22:44:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:44:51,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-02-13 22:44:51,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:51,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:51,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:51,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:51,781 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:44:51,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2023-02-13 22:44:51,965 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:44:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:51,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2023-02-13 22:44:52,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:44:52,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2023-02-13 22:44:52,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2023-02-13 22:44:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:44:52,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:44:57,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454452037] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:44:57,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:44:57,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2023-02-13 22:44:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501436508] [2023-02-13 22:44:57,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:44:57,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-13 22:44:57,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:44:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-13 22:44:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3744, Unknown=1, NotChecked=0, Total=4032 [2023-02-13 22:44:57,937 INFO L87 Difference]: Start difference. First operand 131 states and 174 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:45:02,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:06,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:06,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:45:06,784 INFO L93 Difference]: Finished difference Result 196 states and 253 transitions. [2023-02-13 22:45:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-13 22:45:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-13 22:45:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:45:06,785 INFO L225 Difference]: With dead ends: 196 [2023-02-13 22:45:06,785 INFO L226 Difference]: Without dead ends: 160 [2023-02-13 22:45:06,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1129, Invalid=10000, Unknown=1, NotChecked=0, Total=11130 [2023-02-13 22:45:06,787 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 117 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:45:06,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 438 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2185 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2023-02-13 22:45:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-02-13 22:45:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2023-02-13 22:45:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 123 states have (on average 1.2926829268292683) internal successors, (159), 123 states have internal predecessors, (159), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-13 22:45:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2023-02-13 22:45:06,823 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 64 [2023-02-13 22:45:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:45:06,827 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2023-02-13 22:45:06,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:45:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2023-02-13 22:45:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:45:06,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:45:06,828 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:45:06,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-13 22:45:07,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:45:07,034 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:45:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:45:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2023-02-13 22:45:07,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:45:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039545713] [2023-02-13 22:45:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:45:07,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:45:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:45:08,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:45:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:45:08,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:45:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:45:08,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:45:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:45:08,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:45:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:45:08,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:45:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:45:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:45:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:45:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039545713] [2023-02-13 22:45:08,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039545713] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:45:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403074396] [2023-02-13 22:45:08,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:45:08,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:45:08,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:45:08,461 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:45:08,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-13 22:45:08,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-13 22:45:08,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:45:08,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-13 22:45:08,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:45:08,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:45:16,477 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:45:16,481 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2023-02-13 22:45:16,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 64 [2023-02-13 22:45:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,681 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2023-02-13 22:45:16,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 83 [2023-02-13 22:45:16,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:16,905 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-02-13 22:45:16,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 96 [2023-02-13 22:45:17,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:17,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:17,770 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:45:17,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:45:17,771 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:45:17,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:45:17,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 85 [2023-02-13 22:45:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 22:45:18,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:45:22,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403074396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:45:22,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:45:22,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34] total 60 [2023-02-13 22:45:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464272787] [2023-02-13 22:45:22,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:45:22,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-13 22:45:22,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:45:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-13 22:45:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=5618, Unknown=5, NotChecked=0, Total=6320 [2023-02-13 22:45:22,609 INFO L87 Difference]: Start difference. First operand 140 states and 187 transitions. Second operand has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:45:24,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:26,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:28,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:30,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:34,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:36,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:46,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:45:48,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:46:09,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:46:11,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:46:13,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:46:20,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:46:34,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 22:46:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:46:43,651 INFO L93 Difference]: Finished difference Result 414 states and 547 transitions. [2023-02-13 22:46:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-02-13 22:46:43,652 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-13 22:46:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:46:43,653 INFO L225 Difference]: With dead ends: 414 [2023-02-13 22:46:43,653 INFO L226 Difference]: Without dead ends: 408 [2023-02-13 22:46:43,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7147 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=2807, Invalid=21663, Unknown=22, NotChecked=0, Total=24492 [2023-02-13 22:46:43,656 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 182 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 156 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:46:43,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 645 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2267 Invalid, 13 Unknown, 0 Unchecked, 25.7s Time] [2023-02-13 22:46:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-13 22:46:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 184. [2023-02-13 22:46:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.34375) internal successors, (215), 160 states have internal predecessors, (215), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-13 22:46:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 255 transitions. [2023-02-13 22:46:43,712 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 255 transitions. Word has length 64 [2023-02-13 22:46:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:46:43,712 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 255 transitions. [2023-02-13 22:46:43,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:46:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 255 transitions. [2023-02-13 22:46:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:46:43,713 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:46:43,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:46:43,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-13 22:46:43,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-13 22:46:43,918 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:46:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:46:43,919 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2023-02-13 22:46:43,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:46:43,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269207240] [2023-02-13 22:46:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:46:43,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:46:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:45,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:46:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:45,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:46:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:45,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:46:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:45,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:46:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:46:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:46:45,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:46:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269207240] [2023-02-13 22:46:45,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269207240] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:46:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447290477] [2023-02-13 22:46:45,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:46:45,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:46:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:46:45,232 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:46:45,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-13 22:46:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-13 22:46:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:46:45,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:46:45,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:45,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:45,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:45,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:45,971 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:46:45,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2023-02-13 22:46:46,091 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:46:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:46,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:46,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2023-02-13 22:46:46,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:46,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 75 [2023-02-13 22:46:46,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 39 [2023-02-13 22:46:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 22:46:46,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:46:50,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447290477] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:46:50,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:46:50,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2023-02-13 22:46:50,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180912263] [2023-02-13 22:46:50,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:46:50,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-13 22:46:50,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:46:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-13 22:46:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=4106, Unknown=1, NotChecked=0, Total=4422 [2023-02-13 22:46:50,975 INFO L87 Difference]: Start difference. First operand 184 states and 255 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:46:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:46:55,662 INFO L93 Difference]: Finished difference Result 296 states and 389 transitions. [2023-02-13 22:46:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-13 22:46:55,663 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-13 22:46:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:46:55,664 INFO L225 Difference]: With dead ends: 296 [2023-02-13 22:46:55,664 INFO L226 Difference]: Without dead ends: 264 [2023-02-13 22:46:55,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1287, Invalid=11594, Unknown=1, NotChecked=0, Total=12882 [2023-02-13 22:46:55,665 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 143 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:46:55,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 588 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-13 22:46:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-13 22:46:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 196. [2023-02-13 22:46:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 171 states have (on average 1.345029239766082) internal successors, (230), 171 states have internal predecessors, (230), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-13 22:46:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2023-02-13 22:46:55,739 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 64 [2023-02-13 22:46:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:46:55,739 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2023-02-13 22:46:55,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:46:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2023-02-13 22:46:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:46:55,740 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:46:55,740 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:46:55,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-13 22:46:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-13 22:46:55,944 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:46:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:46:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2023-02-13 22:46:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:46:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474727864] [2023-02-13 22:46:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:46:55,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:46:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:57,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:46:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:57,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:46:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:57,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:46:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:46:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:46:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:46:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:46:57,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:46:57,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474727864] [2023-02-13 22:46:57,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474727864] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:46:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631251932] [2023-02-13 22:46:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:46:57,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:46:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:46:57,215 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:46:57,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-13 22:46:57,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:46:57,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:46:57,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-13 22:46:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:46:57,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:46:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:46:58,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-13 22:46:58,540 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:46:58,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2023-02-13 22:46:58,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:46:58,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-13 22:46:59,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-13 22:46:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-13 22:46:59,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:47:06,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631251932] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:47:06,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:47:06,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 57 [2023-02-13 22:47:06,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356289095] [2023-02-13 22:47:06,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:47:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-13 22:47:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:47:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-13 22:47:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4884, Unknown=2, NotChecked=0, Total=5256 [2023-02-13 22:47:06,619 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:47:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:47:12,937 INFO L93 Difference]: Finished difference Result 294 states and 390 transitions. [2023-02-13 22:47:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-13 22:47:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-13 22:47:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:47:12,942 INFO L225 Difference]: With dead ends: 294 [2023-02-13 22:47:12,942 INFO L226 Difference]: Without dead ends: 288 [2023-02-13 22:47:12,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4841 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1665, Invalid=16693, Unknown=2, NotChecked=0, Total=18360 [2023-02-13 22:47:12,943 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 174 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:47:12,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 431 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-13 22:47:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-13 22:47:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 214. [2023-02-13 22:47:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 186 states have (on average 1.3602150537634408) internal successors, (253), 186 states have internal predecessors, (253), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-13 22:47:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 301 transitions. [2023-02-13 22:47:13,014 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 301 transitions. Word has length 64 [2023-02-13 22:47:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:47:13,014 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 301 transitions. [2023-02-13 22:47:13,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:47:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 301 transitions. [2023-02-13 22:47:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:47:13,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:47:13,015 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:47:13,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-13 22:47:13,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:47:13,220 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:47:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:47:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2023-02-13 22:47:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:47:13,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975148333] [2023-02-13 22:47:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:47:13,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:47:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:14,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:47:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:14,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:47:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:14,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:47:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:14,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:47:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:14,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:47:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:47:14,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:47:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975148333] [2023-02-13 22:47:14,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975148333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:47:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331845366] [2023-02-13 22:47:14,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:47:14,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:47:14,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:47:14,304 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:47:14,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-13 22:47:14,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-13 22:47:14,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:47:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-13 22:47:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:47:14,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-13 22:47:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:14,990 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:47:14,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2023-02-13 22:47:15,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:15,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:15,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:15,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:15,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2023-02-13 22:47:15,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:15,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:15,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:15,254 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2023-02-13 22:47:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 113 [2023-02-13 22:47:16,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:16,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:47:16,224 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:47:16,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:47:16,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 80 [2023-02-13 22:47:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 22:47:16,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:47:23,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331845366] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:47:23,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:47:23,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2023-02-13 22:47:23,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835143049] [2023-02-13 22:47:23,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:47:23,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-13 22:47:23,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:47:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-13 22:47:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=4796, Unknown=2, NotChecked=0, Total=5256 [2023-02-13 22:47:23,964 INFO L87 Difference]: Start difference. First operand 214 states and 301 transitions. Second operand has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:47:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:47:31,319 INFO L93 Difference]: Finished difference Result 276 states and 373 transitions. [2023-02-13 22:47:31,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-13 22:47:31,319 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-13 22:47:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:47:31,320 INFO L225 Difference]: With dead ends: 276 [2023-02-13 22:47:31,320 INFO L226 Difference]: Without dead ends: 253 [2023-02-13 22:47:31,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1726, Invalid=12792, Unknown=2, NotChecked=0, Total=14520 [2023-02-13 22:47:31,325 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 128 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:47:31,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 341 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-13 22:47:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-13 22:47:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2023-02-13 22:47:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 183 states have (on average 1.349726775956284) internal successors, (247), 183 states have internal predecessors, (247), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-13 22:47:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 293 transitions. [2023-02-13 22:47:31,405 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 293 transitions. Word has length 64 [2023-02-13 22:47:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:47:31,406 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 293 transitions. [2023-02-13 22:47:31,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-13 22:47:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 293 transitions. [2023-02-13 22:47:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-13 22:47:31,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:47:31,407 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:47:31,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-13 22:47:31,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:47:31,612 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:47:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:47:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -584834725, now seen corresponding path program 8 times [2023-02-13 22:47:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:47:31,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847275872] [2023-02-13 22:47:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:47:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:47:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:31,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:47:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:31,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:47:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:31,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:47:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:31,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:47:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:31,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:47:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-13 22:47:31,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:47:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847275872] [2023-02-13 22:47:31,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847275872] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:47:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168118058] [2023-02-13 22:47:31,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:47:31,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:47:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:47:31,695 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:47:31,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-13 22:47:31,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:47:31,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:47:31,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-13 22:47:31,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:47:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-13 22:47:31,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:47:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-13 22:47:31,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168118058] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:47:31,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:47:31,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-13 22:47:31,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050131808] [2023-02-13 22:47:31,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:47:31,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-13 22:47:31,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:47:31,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-13 22:47:31,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-13 22:47:31,922 INFO L87 Difference]: Start difference. First operand 210 states and 293 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-13 22:47:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:47:32,194 INFO L93 Difference]: Finished difference Result 348 states and 458 transitions. [2023-02-13 22:47:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 22:47:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2023-02-13 22:47:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:47:32,199 INFO L225 Difference]: With dead ends: 348 [2023-02-13 22:47:32,199 INFO L226 Difference]: Without dead ends: 282 [2023-02-13 22:47:32,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-02-13 22:47:32,202 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:47:32,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 131 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:47:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-13 22:47:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 196. [2023-02-13 22:47:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 171 states have (on average 1.3333333333333333) internal successors, (228), 171 states have internal predecessors, (228), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-13 22:47:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2023-02-13 22:47:32,276 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 66 [2023-02-13 22:47:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:47:32,276 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2023-02-13 22:47:32,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-13 22:47:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2023-02-13 22:47:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-13 22:47:32,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:47:32,277 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:47:32,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-13 22:47:32,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:47:32,482 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:47:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:47:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1051375952, now seen corresponding path program 9 times [2023-02-13 22:47:32,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:47:32,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963989543] [2023-02-13 22:47:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:47:32,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:47:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:32,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:47:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:47:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:47:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:32,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:47:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:32,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:47:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:32,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-13 22:47:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-13 22:47:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:47:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963989543] [2023-02-13 22:47:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963989543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:47:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283090874] [2023-02-13 22:47:32,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:47:32,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:47:32,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:47:32,572 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:47:32,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-13 22:47:32,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-13 22:47:32,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:47:32,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-13 22:47:32,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:47:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-13 22:47:32,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:47:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-13 22:47:32,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283090874] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:47:32,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:47:32,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-13 22:47:32,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039360442] [2023-02-13 22:47:32,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:47:32,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-13 22:47:32,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:47:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-13 22:47:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-13 22:47:32,839 INFO L87 Difference]: Start difference. First operand 196 states and 270 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-13 22:47:33,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:47:33,127 INFO L93 Difference]: Finished difference Result 210 states and 284 transitions. [2023-02-13 22:47:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 22:47:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 74 [2023-02-13 22:47:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:47:33,128 INFO L225 Difference]: With dead ends: 210 [2023-02-13 22:47:33,128 INFO L226 Difference]: Without dead ends: 198 [2023-02-13 22:47:33,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-02-13 22:47:33,129 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:47:33,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 194 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:47:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-02-13 22:47:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 77. [2023-02-13 22:47:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 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) [2023-02-13 22:47:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2023-02-13 22:47:33,168 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 74 [2023-02-13 22:47:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:47:33,168 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2023-02-13 22:47:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-13 22:47:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2023-02-13 22:47:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-13 22:47:33,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:47:33,169 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:47:33,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-13 22:47:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-13 22:47:33,374 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:47:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:47:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash -517304264, now seen corresponding path program 9 times [2023-02-13 22:47:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:47:33,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517661058] [2023-02-13 22:47:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:47:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:47:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:35,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 22:47:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:35,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-13 22:47:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:35,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-13 22:47:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:35,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 22:47:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:35,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 22:47:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:35,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-13 22:47:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:47:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-13 22:47:35,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:47:35,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517661058] [2023-02-13 22:47:35,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517661058] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:47:35,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002448125] [2023-02-13 22:47:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:47:35,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:47:35,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:47:35,584 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:47:35,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-13 22:47:35,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-13 22:47:35,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:47:35,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-13 22:47:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:47:35,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8