./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/min_max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/heap-data/min_max.i -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 6f3dc8ca7e9d6160ebf6e1f17d4641cf9f9e9c7a0130658f0fd8bbb7edc9643d --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:50:35,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:50:35,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:50:35,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:50:35,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:50:35,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:50:35,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:50:35,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:50:35,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:50:35,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:50:35,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:50:35,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:50:35,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:50:35,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:50:35,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:50:35,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:50:35,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:50:35,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:50:35,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:50:35,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:50:35,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:50:35,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:50:35,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:50:35,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:50:35,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:50:35,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:50:35,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:50:35,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:50:35,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:50:35,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:50:35,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:50:35,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:50:35,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:50:35,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:50:35,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:50:35,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:50:35,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:50:35,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:50:35,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:50:35,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:50:35,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:50:35,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:50:35,562 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:50:35,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:50:35,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:50:35,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:50:35,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:50:35,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:50:35,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:50:35,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:50:35,564 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:50:35,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:50:35,564 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:50:35,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:50:35,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:50:35,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:50:35,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:50:35,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:50:35,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:50:35,565 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:50:35,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:50:35,566 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:50:35,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:50:35,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:50:35,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:50:35,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:50:35,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:50:35,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:50:35,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:50:35,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:50:35,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:50:35,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:50:35,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:50:35,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:50:35,567 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:50:35,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:50:35,568 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:50:35,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f3dc8ca7e9d6160ebf6e1f17d4641cf9f9e9c7a0130658f0fd8bbb7edc9643d [2023-02-15 19:50:35,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:50:35,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:50:35,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:50:35,791 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:50:35,791 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:50:35,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/min_max.i [2023-02-15 19:50:36,703 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:50:36,935 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:50:36,935 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/min_max.i [2023-02-15 19:50:36,942 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbfb1105/907c400a01de46a084a6af7617b7c693/FLAGfc901531a [2023-02-15 19:50:36,953 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbfb1105/907c400a01de46a084a6af7617b7c693 [2023-02-15 19:50:36,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:50:36,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:50:36,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:50:36,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:50:36,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:50:36,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:50:36" (1/1) ... [2023-02-15 19:50:36,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e1aace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:36, skipping insertion in model container [2023-02-15 19:50:36,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:50:36" (1/1) ... [2023-02-15 19:50:36,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:50:37,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:50:37,200 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/heap-data/min_max.i[23535,23548] [2023-02-15 19:50:37,210 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/heap-data/min_max.i[23590,23603] [2023-02-15 19:50:37,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:50:37,220 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:50:37,273 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/heap-data/min_max.i[23535,23548] [2023-02-15 19:50:37,275 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/heap-data/min_max.i[23590,23603] [2023-02-15 19:50:37,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:50:37,298 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:50:37,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37 WrapperNode [2023-02-15 19:50:37,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:50:37,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:50:37,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:50:37,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:50:37,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,326 INFO L138 Inliner]: procedures = 121, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2023-02-15 19:50:37,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:50:37,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:50:37,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:50:37,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:50:37,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,351 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:50:37,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:50:37,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:50:37,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:50:37,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (1/1) ... [2023-02-15 19:50:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:50:37,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:37,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 19:50:37,406 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 [2023-02-15 19:50:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 19:50:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 19:50:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 19:50:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:50:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 19:50:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 19:50:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:50:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:50:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:50:37,504 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:50:37,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:50:37,637 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:50:37,642 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:50:37,642 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 19:50:37,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:50:37 BoogieIcfgContainer [2023-02-15 19:50:37,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:50:37,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:50:37,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:50:37,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:50:37,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:50:36" (1/3) ... [2023-02-15 19:50:37,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c85de0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:50:37, skipping insertion in model container [2023-02-15 19:50:37,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:50:37" (2/3) ... [2023-02-15 19:50:37,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c85de0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:50:37, skipping insertion in model container [2023-02-15 19:50:37,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:50:37" (3/3) ... [2023-02-15 19:50:37,653 INFO L112 eAbstractionObserver]: Analyzing ICFG min_max.i [2023-02-15 19:50:37,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:50:37,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-15 19:50:37,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:50:37,725 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;@3f9d3bad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:50:37,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-15 19:50:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 19:50:37,735 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:37,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:37,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:37,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1825905474, now seen corresponding path program 1 times [2023-02-15 19:50:37,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:37,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359938387] [2023-02-15 19:50:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:37,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359938387] [2023-02-15 19:50:37,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359938387] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:50:37,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:50:37,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 19:50:37,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667606604] [2023-02-15 19:50:37,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:50:37,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 19:50:37,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:37,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 19:50:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:50:37,983 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:38,009 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-02-15 19:50:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 19:50:38,012 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 19:50:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:38,018 INFO L225 Difference]: With dead ends: 33 [2023-02-15 19:50:38,018 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 19:50:38,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:50:38,026 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:38,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:50:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 19:50:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 19:50:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-02-15 19:50:38,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2023-02-15 19:50:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:38,052 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-02-15 19:50:38,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-02-15 19:50:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 19:50:38,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:38,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 19:50:38,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash 178093936, now seen corresponding path program 1 times [2023-02-15 19:50:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:38,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852337251] [2023-02-15 19:50:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:38,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:38,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852337251] [2023-02-15 19:50:38,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852337251] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:50:38,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:50:38,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:50:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025549805] [2023-02-15 19:50:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:50:38,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:50:38,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:50:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:50:38,175 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:38,205 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-02-15 19:50:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:50:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 19:50:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:38,206 INFO L225 Difference]: With dead ends: 30 [2023-02-15 19:50:38,206 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 19:50:38,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:50:38,210 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:38,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:50:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 19:50:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 19:50:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-02-15 19:50:38,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2023-02-15 19:50:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:38,225 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-02-15 19:50:38,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-02-15 19:50:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 19:50:38,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:38,226 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:38,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 19:50:38,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1651856839, now seen corresponding path program 1 times [2023-02-15 19:50:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628573605] [2023-02-15 19:50:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:38,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:38,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:38,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628573605] [2023-02-15 19:50:38,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628573605] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:50:38,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:50:38,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:50:38,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519355267] [2023-02-15 19:50:38,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:50:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:50:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:50:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:50:38,578 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:38,669 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-02-15 19:50:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:50:38,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 19:50:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:38,672 INFO L225 Difference]: With dead ends: 28 [2023-02-15 19:50:38,672 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 19:50:38,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:50:38,677 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:38,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:50:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 19:50:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-02-15 19:50:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-02-15 19:50:38,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2023-02-15 19:50:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:38,682 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-02-15 19:50:38,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-02-15 19:50:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 19:50:38,683 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:38,683 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:38,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 19:50:38,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1703602811, now seen corresponding path program 1 times [2023-02-15 19:50:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:38,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170290056] [2023-02-15 19:50:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:38,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:38,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170290056] [2023-02-15 19:50:38,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170290056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:50:38,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:50:38,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:50:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464594526] [2023-02-15 19:50:38,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:50:38,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:50:38,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:50:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:50:38,943 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:39,039 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-02-15 19:50:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:50:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 19:50:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:39,040 INFO L225 Difference]: With dead ends: 40 [2023-02-15 19:50:39,040 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 19:50:39,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:50:39,047 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:39,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 44 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:50:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 19:50:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2023-02-15 19:50:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-02-15 19:50:39,058 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2023-02-15 19:50:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:39,058 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-02-15 19:50:39,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-02-15 19:50:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 19:50:39,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:39,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:39,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 19:50:39,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1911306115, now seen corresponding path program 1 times [2023-02-15 19:50:39,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:39,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875335575] [2023-02-15 19:50:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:39,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:39,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875335575] [2023-02-15 19:50:39,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875335575] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:50:39,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:50:39,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:50:39,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502448388] [2023-02-15 19:50:39,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:50:39,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:50:39,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:50:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:50:39,133 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:39,176 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-02-15 19:50:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:50:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 19:50:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:39,179 INFO L225 Difference]: With dead ends: 55 [2023-02-15 19:50:39,179 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 19:50:39,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:50:39,180 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:39,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:50:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 19:50:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 19:50:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-15 19:50:39,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2023-02-15 19:50:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:39,189 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-15 19:50:39,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-15 19:50:39,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 19:50:39,192 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:39,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:39,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 19:50:39,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1682596603, now seen corresponding path program 1 times [2023-02-15 19:50:39,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:39,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029581127] [2023-02-15 19:50:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:39,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:39,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029581127] [2023-02-15 19:50:39,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029581127] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:50:39,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:50:39,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:50:39,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139436234] [2023-02-15 19:50:39,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:50:39,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:50:39,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:50:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:50:39,386 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:39,495 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-02-15 19:50:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:50:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 19:50:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:39,496 INFO L225 Difference]: With dead ends: 36 [2023-02-15 19:50:39,497 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 19:50:39,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:50:39,498 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:39,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:50:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 19:50:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-15 19:50:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-15 19:50:39,505 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2023-02-15 19:50:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:39,505 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-15 19:50:39,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:39,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-15 19:50:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 19:50:39,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:39,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:39,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 19:50:39,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:39,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:39,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1593313461, now seen corresponding path program 1 times [2023-02-15 19:50:39,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:39,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348658295] [2023-02-15 19:50:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:39,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:39,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348658295] [2023-02-15 19:50:39,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348658295] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522176941] [2023-02-15 19:50:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:39,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:39,628 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) [2023-02-15 19:50:39,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:50:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 19:50:39,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:39,745 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 [2023-02-15 19:50:39,751 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 [2023-02-15 19:50:39,823 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 [2023-02-15 19:50:39,827 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 [2023-02-15 19:50:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:39,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:39,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522176941] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:39,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:39,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-02-15 19:50:39,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615663237] [2023-02-15 19:50:39,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:39,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:50:39,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:39,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:50:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:50:39,924 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:40,062 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2023-02-15 19:50:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:50:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 19:50:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:40,063 INFO L225 Difference]: With dead ends: 46 [2023-02-15 19:50:40,063 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 19:50:40,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:50:40,064 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:40,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 105 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:50:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 19:50:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 19:50:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-02-15 19:50:40,067 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2023-02-15 19:50:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:40,068 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-02-15 19:50:40,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-02-15 19:50:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 19:50:40,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:40,069 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:40,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 19:50:40,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:40,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:40,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1667695916, now seen corresponding path program 2 times [2023-02-15 19:50:40,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:40,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948335972] [2023-02-15 19:50:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:40,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 19:50:40,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948335972] [2023-02-15 19:50:40,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948335972] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443948424] [2023-02-15 19:50:40,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:50:40,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:40,438 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) [2023-02-15 19:50:40,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:50:40,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:50:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:50:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 19:50:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:40,625 INFO L321 Elim1Store]: treesize reduction 48, result has 35.1 percent of original size [2023-02-15 19:50:40,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 49 [2023-02-15 19:50:40,652 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 19 treesize of output 7 [2023-02-15 19:50:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 19:50:40,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:40,715 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 19 treesize of output 7 [2023-02-15 19:50:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 19:50:40,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443948424] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:40,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:40,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2023-02-15 19:50:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436682355] [2023-02-15 19:50:40,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 19:50:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 19:50:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:50:40,721 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:40,946 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2023-02-15 19:50:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:50:40,947 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 19:50:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:40,950 INFO L225 Difference]: With dead ends: 107 [2023-02-15 19:50:40,951 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 19:50:40,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2023-02-15 19:50:40,952 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:40,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 108 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:50:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 19:50:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 37. [2023-02-15 19:50:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-02-15 19:50:40,964 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 23 [2023-02-15 19:50:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:40,964 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-02-15 19:50:40,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-02-15 19:50:40,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 19:50:40,965 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:40,965 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:40,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 19:50:41,171 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,SelfDestructingSolverStorable7 [2023-02-15 19:50:41,171 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1409530478, now seen corresponding path program 1 times [2023-02-15 19:50:41,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:41,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478356624] [2023-02-15 19:50:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:41,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:41,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:41,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478356624] [2023-02-15 19:50:41,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478356624] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:41,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462071679] [2023-02-15 19:50:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:41,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:41,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:41,473 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) [2023-02-15 19:50:41,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 19:50:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 19:50:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:41,546 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 6 treesize of output 5 [2023-02-15 19:50:41,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:50:41,610 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 [2023-02-15 19:50:41,616 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 [2023-02-15 19:50:41,622 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 19:50:41,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2023-02-15 19:50:41,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:50:41,725 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 27 treesize of output 15 [2023-02-15 19:50:41,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2023-02-15 19:50:41,743 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 [2023-02-15 19:50:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:41,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:41,812 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_13| Int) (v_ArrVal_196 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~min~0#1| (+ (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_13| v_ArrVal_196) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) 1)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_13|))))) is different from false [2023-02-15 19:50:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-02-15 19:50:41,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462071679] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:41,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:41,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2023-02-15 19:50:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348395877] [2023-02-15 19:50:41,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:41,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 19:50:41,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:41,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 19:50:41,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2023-02-15 19:50:41,892 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:42,304 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-02-15 19:50:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 19:50:42,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 19:50:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:42,305 INFO L225 Difference]: With dead ends: 47 [2023-02-15 19:50:42,305 INFO L226 Difference]: Without dead ends: 45 [2023-02-15 19:50:42,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=389, Unknown=1, NotChecked=42, Total=552 [2023-02-15 19:50:42,306 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:42,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 86 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2023-02-15 19:50:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-15 19:50:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2023-02-15 19:50:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-15 19:50:42,312 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 23 [2023-02-15 19:50:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:42,312 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-15 19:50:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-15 19:50:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 19:50:42,313 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:42,313 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:42,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 19:50:42,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:42,521 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1643965548, now seen corresponding path program 1 times [2023-02-15 19:50:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:42,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705924086] [2023-02-15 19:50:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:42,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:42,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:42,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705924086] [2023-02-15 19:50:42,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705924086] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:42,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961092161] [2023-02-15 19:50:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:42,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:42,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:42,796 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) [2023-02-15 19:50:42,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 19:50:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 19:50:42,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:42,868 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 6 treesize of output 5 [2023-02-15 19:50:42,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:50:42,901 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 [2023-02-15 19:50:42,906 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 19:50:42,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2023-02-15 19:50:42,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:50:42,917 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 [2023-02-15 19:50:43,009 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 27 treesize of output 15 [2023-02-15 19:50:43,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2023-02-15 19:50:43,028 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 [2023-02-15 19:50:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:43,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:43,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961092161] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:43,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:43,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2023-02-15 19:50:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576176964] [2023-02-15 19:50:43,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:43,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 19:50:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 19:50:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=257, Unknown=1, NotChecked=0, Total=306 [2023-02-15 19:50:43,160 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:43,608 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2023-02-15 19:50:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 19:50:43,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 19:50:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:43,609 INFO L225 Difference]: With dead ends: 93 [2023-02-15 19:50:43,609 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 19:50:43,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=603, Unknown=1, NotChecked=0, Total=756 [2023-02-15 19:50:43,610 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 138 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:43,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 136 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:50:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 19:50:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2023-02-15 19:50:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2023-02-15 19:50:43,616 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 25 [2023-02-15 19:50:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:43,616 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2023-02-15 19:50:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2023-02-15 19:50:43,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 19:50:43,617 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:43,617 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:43,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 19:50:43,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:43,817 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:43,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1055550124, now seen corresponding path program 1 times [2023-02-15 19:50:43,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:43,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74220751] [2023-02-15 19:50:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:43,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:44,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:44,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74220751] [2023-02-15 19:50:44,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74220751] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:44,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100919475] [2023-02-15 19:50:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:44,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:44,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:44,269 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) [2023-02-15 19:50:44,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 19:50:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 19:50:44,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:44,343 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 6 treesize of output 5 [2023-02-15 19:50:44,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:50:44,383 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 [2023-02-15 19:50:44,391 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 [2023-02-15 19:50:44,403 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 19:50:44,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-15 19:50:44,416 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 5 treesize of output 3 [2023-02-15 19:50:44,426 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 19:50:44,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2023-02-15 19:50:44,587 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 [2023-02-15 19:50:44,591 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 25 treesize of output 17 [2023-02-15 19:50:44,631 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 19:50:44,632 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 28 treesize of output 16 [2023-02-15 19:50:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:44,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:44,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100919475] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:44,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:44,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2023-02-15 19:50:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736206420] [2023-02-15 19:50:44,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:44,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 19:50:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 19:50:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-02-15 19:50:44,864 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:45,829 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2023-02-15 19:50:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 19:50:45,829 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 19:50:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:45,830 INFO L225 Difference]: With dead ends: 115 [2023-02-15 19:50:45,830 INFO L226 Difference]: Without dead ends: 113 [2023-02-15 19:50:45,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=366, Invalid=1526, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 19:50:45,831 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 267 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:45,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 179 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:50:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-15 19:50:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2023-02-15 19:50:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.25) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2023-02-15 19:50:45,838 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 25 [2023-02-15 19:50:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:45,838 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2023-02-15 19:50:45,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2023-02-15 19:50:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 19:50:45,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:45,839 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:45,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 19:50:46,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 19:50:46,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1550473430, now seen corresponding path program 1 times [2023-02-15 19:50:46,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:46,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024345119] [2023-02-15 19:50:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:46,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024345119] [2023-02-15 19:50:46,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024345119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771058455] [2023-02-15 19:50:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:46,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:46,385 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) [2023-02-15 19:50:46,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 19:50:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 19:50:46,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:46,454 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 6 treesize of output 5 [2023-02-15 19:50:46,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:50:46,514 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 [2023-02-15 19:50:46,522 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 [2023-02-15 19:50:46,528 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 19:50:46,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2023-02-15 19:50:46,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:50:46,756 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 31 treesize of output 19 [2023-02-15 19:50:46,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2023-02-15 19:50:46,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-02-15 19:50:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:46,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:47,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771058455] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:47,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:47,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2023-02-15 19:50:47,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146074808] [2023-02-15 19:50:47,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:47,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 19:50:47,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 19:50:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=731, Unknown=1, NotChecked=0, Total=812 [2023-02-15 19:50:47,147 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:49,801 INFO L93 Difference]: Finished difference Result 260 states and 297 transitions. [2023-02-15 19:50:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 19:50:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 19:50:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:49,802 INFO L225 Difference]: With dead ends: 260 [2023-02-15 19:50:49,802 INFO L226 Difference]: Without dead ends: 258 [2023-02-15 19:50:49,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=967, Invalid=4732, Unknown=1, NotChecked=0, Total=5700 [2023-02-15 19:50:49,804 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 418 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:49,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 312 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 19:50:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-15 19:50:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 42. [2023-02-15 19:50:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-02-15 19:50:49,815 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 25 [2023-02-15 19:50:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:49,815 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-02-15 19:50:49,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-02-15 19:50:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 19:50:49,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:49,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:49,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 19:50:50,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:50,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash 138316690, now seen corresponding path program 2 times [2023-02-15 19:50:50,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:50,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99307504] [2023-02-15 19:50:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:50,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:50,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99307504] [2023-02-15 19:50:50,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99307504] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:50,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389223579] [2023-02-15 19:50:50,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:50:50,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:50,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:50,265 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) [2023-02-15 19:50:50,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 19:50:50,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:50:50,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:50:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 19:50:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:50,348 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 [2023-02-15 19:50:50,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:50:50,355 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 [2023-02-15 19:50:50,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:50:50,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:50:50,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:50,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 19:50:50,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:50,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 19:50:50,435 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 19:50:50,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2023-02-15 19:50:50,610 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-15 19:50:50,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2023-02-15 19:50:50,617 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 19:50:50,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 19:50:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:50,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:50,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:50,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 19:50:50,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:50,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-02-15 19:50:50,706 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 6 treesize of output 4 [2023-02-15 19:50:50,717 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 6 treesize of output 4 [2023-02-15 19:50:50,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:50,806 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-02-15 19:50:50,815 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 12 treesize of output 10 [2023-02-15 19:50:50,817 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:50,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-02-15 19:50:50,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:50,823 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-02-15 19:50:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:50,826 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 16 treesize of output 8 [2023-02-15 19:50:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:50,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389223579] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:50,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:50,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2023-02-15 19:50:50,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879672431] [2023-02-15 19:50:50,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:50,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 19:50:50,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:50,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 19:50:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:50:50,833 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:51,054 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-15 19:50:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:50:51,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 19:50:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:51,061 INFO L225 Difference]: With dead ends: 73 [2023-02-15 19:50:51,061 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 19:50:51,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-02-15 19:50:51,062 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:51,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 123 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:50:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 19:50:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-15 19:50:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-15 19:50:51,067 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 28 [2023-02-15 19:50:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:51,067 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-15 19:50:51,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-15 19:50:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 19:50:51,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:51,068 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:51,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 19:50:51,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:51,273 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash -334041831, now seen corresponding path program 3 times [2023-02-15 19:50:51,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752414340] [2023-02-15 19:50:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:51,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:51,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752414340] [2023-02-15 19:50:51,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752414340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:51,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9022578] [2023-02-15 19:50:51,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 19:50:51,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:51,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:51,795 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) [2023-02-15 19:50:51,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 19:50:51,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 19:50:51,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:50:51,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 19:50:51,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:51,888 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 6 treesize of output 5 [2023-02-15 19:50:51,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:50:51,941 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 [2023-02-15 19:50:51,954 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 19:50:51,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 19:50:51,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:50:51,968 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 [2023-02-15 19:50:52,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:50:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:52,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-15 19:50:52,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:50:52,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:52,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:50:52,065 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-15 19:50:52,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2023-02-15 19:50:52,071 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 5 treesize of output 3 [2023-02-15 19:50:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:52,079 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-15 19:50:52,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-15 19:50:52,354 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-15 19:50:52,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 47 [2023-02-15 19:50:52,366 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 19:50:52,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 19:50:52,383 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 [2023-02-15 19:50:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:52,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:52,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:52,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-02-15 19:50:52,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:52,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2023-02-15 19:50:52,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:52,593 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2023-02-15 19:50:52,595 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:52,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2023-02-15 19:50:52,599 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 62 treesize of output 50 [2023-02-15 19:50:52,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:52,603 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-02-15 19:50:52,606 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:52,607 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2023-02-15 19:50:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:52,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9022578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:52,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:52,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2023-02-15 19:50:52,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432739168] [2023-02-15 19:50:52,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:52,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 19:50:52,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 19:50:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=529, Unknown=1, NotChecked=0, Total=600 [2023-02-15 19:50:52,705 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:53,847 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2023-02-15 19:50:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 19:50:53,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 19:50:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:53,848 INFO L225 Difference]: With dead ends: 127 [2023-02-15 19:50:53,848 INFO L226 Difference]: Without dead ends: 125 [2023-02-15 19:50:53,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=1288, Unknown=1, NotChecked=0, Total=1640 [2023-02-15 19:50:53,849 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 220 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:53,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 224 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:50:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-15 19:50:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2023-02-15 19:50:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2023-02-15 19:50:53,862 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 33 [2023-02-15 19:50:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:53,862 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2023-02-15 19:50:53,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2023-02-15 19:50:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 19:50:53,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:53,863 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:53,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 19:50:54,068 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,SelfDestructingSolverStorable13 [2023-02-15 19:50:54,069 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1354901911, now seen corresponding path program 1 times [2023-02-15 19:50:54,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532687439] [2023-02-15 19:50:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:54,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:54,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532687439] [2023-02-15 19:50:54,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532687439] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:54,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680711669] [2023-02-15 19:50:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:54,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:54,641 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) [2023-02-15 19:50:54,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 19:50:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:54,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 19:50:54,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:54,739 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 6 treesize of output 5 [2023-02-15 19:50:54,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:50:54,787 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 [2023-02-15 19:50:54,798 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 19:50:54,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 19:50:54,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:50:54,811 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 [2023-02-15 19:50:54,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:50:54,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:50:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:54,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-15 19:50:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:54,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:50:54,909 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-15 19:50:54,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2023-02-15 19:50:54,916 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 5 treesize of output 3 [2023-02-15 19:50:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:54,925 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-15 19:50:54,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-15 19:50:55,189 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-15 19:50:55,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 49 [2023-02-15 19:50:55,196 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 19:50:55,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 19:50:55,230 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 19:50:55,231 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 28 treesize of output 16 [2023-02-15 19:50:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:55,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:55,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:55,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-02-15 19:50:55,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:55,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-02-15 19:50:55,393 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_15 (Array Int Int)) (v_arrayElimArr_16 (Array Int Int)) (v_ArrVal_619 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_36| Int)) (let ((.cse0 (select v_ArrVal_619 4))) (or (< |c_ULTIMATE.start_main_~min~0#1| (+ .cse0 1)) (< .cse0 (+ (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_36| v_ArrVal_619) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_36| v_arrayElimArr_15) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_36| v_arrayElimArr_16) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 4)) 1)) (not (= (select v_arrayElimArr_15 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_36|))) (not (= (select v_arrayElimArr_16 0) |c_ULTIMATE.start_main_~l~0#1.offset|))))) is different from false [2023-02-15 19:50:55,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:55,448 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 66 [2023-02-15 19:50:55,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:55,453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2023-02-15 19:50:55,455 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 64 treesize of output 52 [2023-02-15 19:50:55,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:55,460 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-02-15 19:50:55,463 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:55,466 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2023-02-15 19:50:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2023-02-15 19:50:55,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680711669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:55,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:55,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2023-02-15 19:50:55,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129910747] [2023-02-15 19:50:55,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:55,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 19:50:55,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:55,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 19:50:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=729, Unknown=2, NotChecked=54, Total=870 [2023-02-15 19:50:55,581 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:50:57,616 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2023-02-15 19:50:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 19:50:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 19:50:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:50:57,617 INFO L225 Difference]: With dead ends: 185 [2023-02-15 19:50:57,617 INFO L226 Difference]: Without dead ends: 183 [2023-02-15 19:50:57,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=494, Invalid=2160, Unknown=2, NotChecked=100, Total=2756 [2023-02-15 19:50:57,618 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 279 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:50:57,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 318 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 572 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2023-02-15 19:50:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-15 19:50:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 91. [2023-02-15 19:50:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2023-02-15 19:50:57,629 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 33 [2023-02-15 19:50:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:50:57,629 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2023-02-15 19:50:57,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:50:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2023-02-15 19:50:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 19:50:57,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:50:57,630 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:50:57,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 19:50:57,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 19:50:57,835 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:50:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:50:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash -200028325, now seen corresponding path program 2 times [2023-02-15 19:50:57,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:50:57,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109502429] [2023-02-15 19:50:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:50:57,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:50:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:50:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:58,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:50:58,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109502429] [2023-02-15 19:50:58,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109502429] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:50:58,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832121106] [2023-02-15 19:50:58,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:50:58,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:50:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:50:58,403 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) [2023-02-15 19:50:58,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 19:50:58,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:50:58,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:50:58,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 19:50:58,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:50:58,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:50:58,524 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 6 treesize of output 5 [2023-02-15 19:50:58,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:58,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2023-02-15 19:50:58,586 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 [2023-02-15 19:50:58,599 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 19:50:58,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 19:50:58,613 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 [2023-02-15 19:50:58,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:50:58,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:50:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:58,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-15 19:50:58,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:58,748 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-15 19:50:58,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-15 19:50:58,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:58,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:50:58,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:50:58,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 43 [2023-02-15 19:50:59,087 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-15 19:50:59,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 61 [2023-02-15 19:50:59,096 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 19:50:59,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 19:50:59,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-02-15 19:50:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:59,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:50:59,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:59,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-02-15 19:50:59,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:59,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-02-15 19:50:59,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:59,422 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 74 [2023-02-15 19:50:59,425 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:59,434 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2023-02-15 19:50:59,437 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 72 treesize of output 58 [2023-02-15 19:50:59,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:50:59,441 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2023-02-15 19:50:59,443 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:59,444 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2023-02-15 19:50:59,573 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:59,574 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:50:59,577 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 11 treesize of output 7 [2023-02-15 19:50:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:50:59,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832121106] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:50:59,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:50:59,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 32 [2023-02-15 19:50:59,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890901187] [2023-02-15 19:50:59,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:50:59,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 19:50:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:50:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 19:50:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=902, Unknown=3, NotChecked=0, Total=992 [2023-02-15 19:50:59,591 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:51:10,025 INFO L93 Difference]: Finished difference Result 414 states and 458 transitions. [2023-02-15 19:51:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-15 19:51:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 19:51:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:51:10,038 INFO L225 Difference]: With dead ends: 414 [2023-02-15 19:51:10,039 INFO L226 Difference]: Without dead ends: 412 [2023-02-15 19:51:10,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3186 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1868, Invalid=9441, Unknown=33, NotChecked=0, Total=11342 [2023-02-15 19:51:10,041 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1204 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 36 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:51:10,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 471 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 915 Invalid, 25 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 19:51:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-15 19:51:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 55. [2023-02-15 19:51:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-02-15 19:51:10,062 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2023-02-15 19:51:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:51:10,063 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-02-15 19:51:10,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-02-15 19:51:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 19:51:10,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:51:10,064 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:51:10,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 19:51:10,268 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,SelfDestructingSolverStorable15 [2023-02-15 19:51:10,269 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:51:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:51:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1108473179, now seen corresponding path program 2 times [2023-02-15 19:51:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:51:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444585757] [2023-02-15 19:51:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:51:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:51:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:51:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:10,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:51:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444585757] [2023-02-15 19:51:10,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444585757] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:51:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768373646] [2023-02-15 19:51:10,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:51:10,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:51:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:51:10,744 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) [2023-02-15 19:51:10,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 19:51:10,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:51:10,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:51:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 19:51:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:51:10,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:51:10,848 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 6 treesize of output 5 [2023-02-15 19:51:10,878 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 [2023-02-15 19:51:10,886 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 19:51:10,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-15 19:51:10,890 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 5 treesize of output 3 [2023-02-15 19:51:10,904 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 19:51:10,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 19:51:10,913 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 [2023-02-15 19:51:10,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:10,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:10,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:10,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-02-15 19:51:10,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:10,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:51:11,015 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-15 19:51:11,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2023-02-15 19:51:11,021 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 5 treesize of output 3 [2023-02-15 19:51:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:11,032 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-15 19:51:11,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-15 19:51:11,261 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-15 19:51:11,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 47 [2023-02-15 19:51:11,268 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 19:51:11,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 19:51:11,290 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 [2023-02-15 19:51:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:11,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:51:11,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:11,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2023-02-15 19:51:11,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:11,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-02-15 19:51:11,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:11,487 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 58 [2023-02-15 19:51:11,489 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:11,490 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 55 treesize of output 43 [2023-02-15 19:51:11,493 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 58 treesize of output 46 [2023-02-15 19:51:11,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:11,497 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-02-15 19:51:11,499 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:11,500 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 28 treesize of output 20 [2023-02-15 19:51:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:11,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768373646] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:51:11,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:51:11,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2023-02-15 19:51:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117814975] [2023-02-15 19:51:11,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:51:11,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 19:51:11,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:51:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 19:51:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=484, Unknown=2, NotChecked=0, Total=552 [2023-02-15 19:51:11,592 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:51:12,437 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2023-02-15 19:51:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 19:51:12,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 19:51:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:51:12,438 INFO L225 Difference]: With dead ends: 152 [2023-02-15 19:51:12,438 INFO L226 Difference]: Without dead ends: 150 [2023-02-15 19:51:12,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=1252, Unknown=2, NotChecked=0, Total=1482 [2023-02-15 19:51:12,439 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 247 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:51:12,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 230 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:51:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-15 19:51:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 96. [2023-02-15 19:51:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 95 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2023-02-15 19:51:12,457 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 35 [2023-02-15 19:51:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:51:12,457 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2023-02-15 19:51:12,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 24 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2023-02-15 19:51:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 19:51:12,458 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:51:12,458 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:51:12,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 19:51:12,662 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,SelfDestructingSolverStorable16 [2023-02-15 19:51:12,663 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:51:12,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:51:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2065136743, now seen corresponding path program 2 times [2023-02-15 19:51:12,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:51:12,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615181379] [2023-02-15 19:51:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:51:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:51:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:51:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:13,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:51:13,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615181379] [2023-02-15 19:51:13,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615181379] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:51:13,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437738581] [2023-02-15 19:51:13,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:51:13,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:51:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:51:13,193 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) [2023-02-15 19:51:13,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 19:51:13,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:51:13,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:51:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 19:51:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:51:13,300 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 6 treesize of output 5 [2023-02-15 19:51:13,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:51:13,335 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 [2023-02-15 19:51:13,340 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 [2023-02-15 19:51:13,351 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 19:51:13,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 19:51:13,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:51:13,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:13,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:13,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-02-15 19:51:13,514 INFO L321 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2023-02-15 19:51:13,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2023-02-15 19:51:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:13,522 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-02-15 19:51:13,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2023-02-15 19:51:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:13,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:51:13,858 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-15 19:51:13,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 54 [2023-02-15 19:51:13,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:13,865 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 19:51:13,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 19:51:13,928 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-15 19:51:13,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2023-02-15 19:51:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:13,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:51:14,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:14,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-02-15 19:51:14,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:14,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-02-15 19:51:14,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:14,360 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 62 [2023-02-15 19:51:14,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:14,366 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 59 treesize of output 47 [2023-02-15 19:51:14,370 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 62 treesize of output 50 [2023-02-15 19:51:14,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:14,379 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-02-15 19:51:14,382 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:14,383 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 32 treesize of output 24 [2023-02-15 19:51:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:14,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437738581] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:51:14,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:51:14,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 38 [2023-02-15 19:51:14,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046657466] [2023-02-15 19:51:14,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:51:14,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 19:51:14,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:51:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 19:51:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 19:51:14,554 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:51:17,506 INFO L93 Difference]: Finished difference Result 262 states and 291 transitions. [2023-02-15 19:51:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 19:51:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 19:51:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:51:17,507 INFO L225 Difference]: With dead ends: 262 [2023-02-15 19:51:17,507 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 19:51:17,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=991, Invalid=5171, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 19:51:17,509 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 574 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 19:51:17,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 396 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 19:51:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 19:51:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 109. [2023-02-15 19:51:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 108 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2023-02-15 19:51:17,531 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 35 [2023-02-15 19:51:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:51:17,531 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2023-02-15 19:51:17,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2023-02-15 19:51:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 19:51:17,532 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:51:17,532 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:51:17,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 19:51:17,732 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,SelfDestructingSolverStorable17 [2023-02-15 19:51:17,732 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:51:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:51:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash -678933349, now seen corresponding path program 2 times [2023-02-15 19:51:17,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:51:17,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136331570] [2023-02-15 19:51:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:51:17,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:51:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:51:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:18,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:51:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136331570] [2023-02-15 19:51:18,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136331570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:51:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462259513] [2023-02-15 19:51:18,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:51:18,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:51:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:51:18,329 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) [2023-02-15 19:51:18,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 19:51:18,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:51:18,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:51:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 19:51:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:51:18,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:51:18,452 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 6 treesize of output 5 [2023-02-15 19:51:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:18,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2023-02-15 19:51:18,547 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 [2023-02-15 19:51:18,561 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 19:51:18,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 19:51:18,570 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 [2023-02-15 19:51:18,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:18,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:18,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-02-15 19:51:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:18,725 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-15 19:51:18,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 59 [2023-02-15 19:51:18,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:18,740 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-15 19:51:18,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-15 19:51:18,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:18,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:51:19,212 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-15 19:51:19,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 67 [2023-02-15 19:51:19,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:19,220 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 19:51:19,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-02-15 19:51:19,297 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 19:51:19,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2023-02-15 19:51:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:19,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:51:19,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:19,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-02-15 19:51:19,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:19,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-02-15 19:51:19,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:19,773 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 72 [2023-02-15 19:51:19,776 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:19,777 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 69 treesize of output 57 [2023-02-15 19:51:19,780 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 72 treesize of output 58 [2023-02-15 19:51:19,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:19,786 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2023-02-15 19:51:19,788 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:19,790 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 40 treesize of output 32 [2023-02-15 19:51:20,047 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:20,048 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:20,050 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 15 treesize of output 11 [2023-02-15 19:51:20,052 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 15 treesize of output 11 [2023-02-15 19:51:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:20,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462259513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:51:20,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:51:20,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 43 [2023-02-15 19:51:20,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013029585] [2023-02-15 19:51:20,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:51:20,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 19:51:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:51:20,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 19:51:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1674, Unknown=1, NotChecked=0, Total=1806 [2023-02-15 19:51:20,069 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:51:31,896 INFO L93 Difference]: Finished difference Result 348 states and 390 transitions. [2023-02-15 19:51:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-02-15 19:51:31,896 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 19:51:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:51:31,897 INFO L225 Difference]: With dead ends: 348 [2023-02-15 19:51:31,897 INFO L226 Difference]: Without dead ends: 346 [2023-02-15 19:51:31,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3515 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2272, Invalid=13729, Unknown=1, NotChecked=0, Total=16002 [2023-02-15 19:51:31,900 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 730 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 18 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-15 19:51:31,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 919 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2292 Invalid, 5 Unknown, 0 Unchecked, 1.9s Time] [2023-02-15 19:51:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-02-15 19:51:31,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 57. [2023-02-15 19:51:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-02-15 19:51:31,915 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 35 [2023-02-15 19:51:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:51:31,915 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-02-15 19:51:31,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-02-15 19:51:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 19:51:31,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:51:31,916 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:51:31,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 19:51:32,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:51:32,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:51:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:51:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1475182485, now seen corresponding path program 4 times [2023-02-15 19:51:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:51:32,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768808866] [2023-02-15 19:51:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:51:32,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:51:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:51:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:32,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:51:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768808866] [2023-02-15 19:51:32,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768808866] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:51:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32615502] [2023-02-15 19:51:32,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 19:51:32,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:51:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:51:32,622 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) [2023-02-15 19:51:32,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 19:51:32,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 19:51:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:51:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-15 19:51:32,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:51:32,734 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 [2023-02-15 19:51:32,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:51:32,741 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 [2023-02-15 19:51:32,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:32,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:32,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:32,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 19:51:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:32,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 19:51:32,803 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 19:51:32,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 19:51:32,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:32,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:32,883 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-15 19:51:32,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2023-02-15 19:51:32,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:32,895 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-15 19:51:32,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 50 [2023-02-15 19:51:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:32,908 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-15 19:51:32,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-02-15 19:51:33,217 INFO L321 Elim1Store]: treesize reduction 85, result has 11.5 percent of original size [2023-02-15 19:51:33,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 74 [2023-02-15 19:51:33,228 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-02-15 19:51:33,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2023-02-15 19:51:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:33,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:51:33,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:33,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2023-02-15 19:51:33,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:33,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2023-02-15 19:51:33,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:33,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 127 [2023-02-15 19:51:33,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:33,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 118 [2023-02-15 19:51:33,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:33,790 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-02-15 19:51:33,791 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:33,796 INFO L321 Elim1Store]: treesize reduction 32, result has 11.1 percent of original size [2023-02-15 19:51:33,796 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 256 treesize of output 222 [2023-02-15 19:51:33,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:33,804 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 152 [2023-02-15 19:51:33,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:33,807 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 80 treesize of output 74 [2023-02-15 19:51:33,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2023-02-15 19:51:33,813 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:33,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:33,817 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-15 19:51:33,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 14 [2023-02-15 19:51:33,821 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 40 treesize of output 32 [2023-02-15 19:51:33,822 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 37 treesize of output 31 [2023-02-15 19:51:33,826 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 19:51:33,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2023-02-15 19:51:33,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:33,832 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 78 [2023-02-15 19:51:33,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:33,836 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 54 [2023-02-15 19:51:33,838 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:33,839 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 42 treesize of output 36 [2023-02-15 19:51:33,842 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:33,843 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 166 [2023-02-15 19:51:33,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 155 [2023-02-15 19:51:33,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 115 [2023-02-15 19:51:33,854 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 19:51:33,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 18 [2023-02-15 19:51:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:33,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32615502] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:51:33,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:51:33,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2023-02-15 19:51:33,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857316710] [2023-02-15 19:51:33,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:51:33,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 19:51:33,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:51:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 19:51:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2023-02-15 19:51:33,862 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:51:34,323 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2023-02-15 19:51:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 19:51:34,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-15 19:51:34,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:51:34,324 INFO L225 Difference]: With dead ends: 93 [2023-02-15 19:51:34,324 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 19:51:34,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-15 19:51:34,324 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:51:34,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 268 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:51:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 19:51:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-02-15 19:51:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2023-02-15 19:51:34,338 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 38 [2023-02-15 19:51:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:51:34,338 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2023-02-15 19:51:34,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:51:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2023-02-15 19:51:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 19:51:34,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:51:34,339 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:51:34,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 19:51:34,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:51:34,539 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:51:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:51:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash -901782222, now seen corresponding path program 5 times [2023-02-15 19:51:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:51:34,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063976289] [2023-02-15 19:51:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:51:34,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:51:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:51:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:35,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:51:35,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063976289] [2023-02-15 19:51:35,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063976289] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:51:35,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370634237] [2023-02-15 19:51:35,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 19:51:35,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:51:35,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:51:35,322 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) [2023-02-15 19:51:35,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 19:51:35,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 19:51:35,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:51:35,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-15 19:51:35,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:51:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:35,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-15 19:51:35,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 19:51:35,805 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 [2023-02-15 19:51:35,816 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-15 19:51:35,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-15 19:51:35,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:51:35,830 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 [2023-02-15 19:51:36,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:36,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2023-02-15 19:51:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-02-15 19:51:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,039 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-02-15 19:51:36,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-02-15 19:51:36,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:51:36,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:36,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2023-02-15 19:51:36,178 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2023-02-15 19:51:36,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 92 [2023-02-15 19:51:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,193 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-15 19:51:36,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 40 [2023-02-15 19:51:36,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2023-02-15 19:51:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:51:36,216 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2023-02-15 19:51:36,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2023-02-15 19:51:36,222 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 74 treesize of output 58 [2023-02-15 19:51:37,554 INFO L321 Elim1Store]: treesize reduction 160, result has 54.2 percent of original size [2023-02-15 19:51:37,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 287 treesize of output 340 [2023-02-15 19:51:37,752 INFO L321 Elim1Store]: treesize reduction 212, result has 41.9 percent of original size [2023-02-15 19:51:37,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 255 treesize of output 345 [2023-02-15 19:51:41,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 33 treesize of output 13 [2023-02-15 19:51:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:51:41,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:51:41,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:41,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 72 [2023-02-15 19:51:41,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:41,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 63 [2023-02-15 19:51:41,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:41,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 115 [2023-02-15 19:51:41,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:41,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 106 [2023-02-15 19:51:42,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:42,263 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 357 treesize of output 295 [2023-02-15 19:51:42,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:51:42,269 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 223 [2023-02-15 19:51:42,298 INFO L321 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2023-02-15 19:51:42,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 3149 treesize of output 2987 [2023-02-15 19:51:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:51:42,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5385 treesize of output 5123 [2023-02-15 19:51:42,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4792 treesize of output 4354 [2023-02-15 19:51:42,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4348 treesize of output 3584 [2023-02-15 19:51:42,419 INFO L321 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2023-02-15 19:51:42,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 3569 treesize of output 3431 [2023-02-15 19:51:42,461 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 19:51:42,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 3377 treesize of output 3239